diff options
| author | Mauro Carvalho Chehab | 2020-10-30 08:40:39 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2020-10-30 13:07:01 +0100 |
| commit | 34433332841de2787f903fcf7de8dc3e06780f4a (patch) | |
| tree | 77f3ceec7fbb1a5d8def1fc501233ee0bbd9b950 /Documentation | |
| parent | 98913408c5465ac477f80da7affe347b413edaa4 (diff) | |
docs: ABI: testing: make the files compatible with ReST output
Some files over there won't parse well by Sphinx.
Fix them.
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for IIO
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/58cf3c2d611e0197fb215652719ebd82ca2658db.1604042072.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
74 files changed, 1336 insertions, 879 deletions
diff --git a/Documentation/ABI/testing/configfs-spear-pcie-gadget b/Documentation/ABI/testing/configfs-spear-pcie-gadget index 840c324ef34d..cf877bd341df 100644 --- a/Documentation/ABI/testing/configfs-spear-pcie-gadget +++ b/Documentation/ABI/testing/configfs-spear-pcie-gadget @@ -10,22 +10,24 @@ Description: This interfaces can be used to show spear's PCIe device capability. Nodes are only visible when configfs is mounted. To mount configfs - in /config directory use: - # mount -t configfs none /config/ + in /config directory use:: - For nth PCIe Device Controller - /config/pcie-gadget.n/ - link ... used to enable ltssm and read its status. - int_type ...used to configure and read type of supported - interrupt - no_of_msi ... used to configure number of MSI vector needed and + # mount -t configfs none /config/ + + For nth PCIe Device Controller /config/pcie-gadget.n/: + + =============== ====================================================== + link used to enable ltssm and read its status. + int_type used to configure and read type of supported interrupt + no_of_msi used to configure number of MSI vector needed and to read no of MSI granted. - inta ... write 1 to assert INTA and 0 to de-assert. - send_msi ... write MSI vector to be sent. - vendor_id ... used to write and read vendor id (hex) - device_id ... used to write and read device id (hex) - bar0_size ... used to write and read bar0_size - bar0_address ... used to write and read bar0 mapped area in hex. - bar0_rw_offset ... used to write and read offset of bar0 where - bar0_data will be written or read. - bar0_data ... used to write and read data at bar0_rw_offset. + inta write 1 to assert INTA and 0 to de-assert. + send_msi write MSI vector to be sent. + vendor_id used to write and read vendor id (hex) + device_id used to write and read device id (hex) + bar0_size used to write and read bar0_size + bar0_address used to write and read bar0 mapped area in hex. + bar0_rw_offset used to write and read offset of bar0 where bar0_data + will be written or read. + bar0_data used to write and read data at bar0_rw_offset. + =============== ====================================================== diff --git a/Documentation/ABI/testing/configfs-usb-gadget b/Documentation/ABI/testing/configfs-usb-gadget index 4594cc2435e8..dc351e9af80a 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget +++ b/Documentation/ABI/testing/configfs-usb-gadget @@ -12,22 +12,24 @@ Description: The attributes of a gadget: - UDC - bind a gadget to UDC/unbind a gadget; - write UDC's name found in /sys/class/udc/* - to bind a gadget, empty string "" to unbind. - - max_speed - maximum speed the driver supports. Valid - names are super-speed-plus, super-speed, - high-speed, full-speed, and low-speed. - - bDeviceClass - USB device class code - bDeviceSubClass - USB device subclass code - bDeviceProtocol - USB device protocol code - bMaxPacketSize0 - maximum endpoint 0 packet size - bcdDevice - bcd device release number - bcdUSB - bcd USB specification version number - idProduct - product ID - idVendor - vendor ID + ================ ============================================ + UDC bind a gadget to UDC/unbind a gadget; + write UDC's name found in /sys/class/udc/* + to bind a gadget, empty string "" to unbind. + + max_speed maximum speed the driver supports. Valid + names are super-speed-plus, super-speed, + high-speed, full-speed, and low-speed. + + bDeviceClass USB device class code + bDeviceSubClass USB device subclass code + bDeviceProtocol USB device protocol code + bMaxPacketSize0 maximum endpoint 0 packet size + bcdDevice bcd device release number + bcdUSB bcd USB specification version number + idProduct product ID + idVendor vendor ID + ================ ============================================ What: /config/usb-gadget/gadget/configs Date: Jun 2013 @@ -41,8 +43,10 @@ KernelVersion: 3.11 Description: The attributes of a configuration: - bmAttributes - configuration characteristics - MaxPower - maximum power consumption from the bus + ================ ====================================== + bmAttributes configuration characteristics + MaxPower maximum power consumption from the bus + ================ ====================================== What: /config/usb-gadget/gadget/configs/config/strings Date: Jun 2013 @@ -57,7 +61,9 @@ KernelVersion: 3.11 Description: The attributes: - configuration - configuration description + ================ ========================= + configuration configuration description + ================ ========================= What: /config/usb-gadget/gadget/functions @@ -76,8 +82,10 @@ Description: The attributes: - compatible_id - 8-byte string for "Compatible ID" - sub_compatible_id - 8-byte string for "Sub Compatible ID" + ================= ===================================== + compatible_id 8-byte string for "Compatible ID" + sub_compatible_id 8-byte string for "Sub Compatible ID" + ================= ===================================== What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>/<property> Date: May 2014 @@ -89,16 +97,19 @@ Description: The attributes: - type - value 1..7 for interpreting the data - 1: unicode string - 2: unicode string with environment variable - 3: binary - 4: little-endian 32-bit - 5: big-endian 32-bit - 6: unicode string with a symbolic link - 7: multiple unicode strings - data - blob of data to be interpreted depending on + ===== =============================================== + type value 1..7 for interpreting the data + + - 1: unicode string + - 2: unicode string with environment variable + - 3: binary + - 4: little-endian 32-bit + - 5: big-endian 32-bit + - 6: unicode string with a symbolic link + - 7: multiple unicode strings + data blob of data to be interpreted depending on type + ===== =============================================== What: /config/usb-gadget/gadget/strings Date: Jun 2013 @@ -113,9 +124,11 @@ KernelVersion: 3.11 Description: The attributes: - serialnumber - gadget's serial number (string) - product - gadget's product description - manufacturer - gadget's manufacturer description + ============ ================================= + serialnumber gadget's serial number (string) + product gadget's product description + manufacturer gadget's manufacturer description + ============ ================================= What: /config/usb-gadget/gadget/os_desc Date: May 2014 @@ -123,8 +136,10 @@ KernelVersion: 3.16 Description: This group contains "OS String" extension handling attributes. - use - flag turning "OS Desctiptors" support on/off - b_vendor_code - one-byte value used for custom per-device and + ============= =============================================== + use flag turning "OS Desctiptors" support on/off + b_vendor_code one-byte value used for custom per-device and per-interface requests - qw_sign - an identifier to be reported as "OS String" + qw_sign an identifier to be reported as "OS String" proper + ============= =============================================== diff --git a/Documentation/ABI/testing/configfs-usb-gadget-hid b/Documentation/ABI/testing/configfs-usb-gadget-hid index f12e00e6baa3..748705c4cb58 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-hid +++ b/Documentation/ABI/testing/configfs-usb-gadget-hid @@ -4,8 +4,10 @@ KernelVersion: 3.19 Description: The attributes: - protocol - HID protocol to use - report_desc - blob corresponding to HID report descriptors + ============= ============================================ + protocol HID protocol to use + report_desc blob corresponding to HID report descriptors except the data passed through /dev/hidg<N> - report_length - HID report length - subclass - HID device subclass to use + report_length HID report length + subclass HID device subclass to use + ============= ============================================ diff --git a/Documentation/ABI/testing/configfs-usb-gadget-rndis b/Documentation/ABI/testing/configfs-usb-gadget-rndis index 137399095d74..9416eda7fe93 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-rndis +++ b/Documentation/ABI/testing/configfs-usb-gadget-rndis @@ -4,14 +4,16 @@ KernelVersion: 3.11 Description: The attributes: - ifname - network device interface name associated with + ========= ============================================= + ifname network device interface name associated with this function instance - qmult - queue length multiplier for high and + qmult queue length multiplier for high and super speed - host_addr - MAC address of host's end of this + host_addr MAC address of host's end of this Ethernet over USB link - dev_addr - MAC address of device's end of this + dev_addr MAC address of device's end of this Ethernet over USB link - class - USB interface class, default is 02 (hex) - subclass - USB interface subclass, default is 06 (hex) - protocol - USB interface protocol, default is 00 (hex) + class USB interface class, default is 02 (hex) + subclass USB interface subclass, default is 06 (hex) + protocol USB interface protocol, default is 00 (hex) + ========= ============================================= diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uac1 b/Documentation/ABI/testing/configfs-usb-gadget-uac1 index abfe447c848f..dc23fd776943 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uac1 +++ b/Documentation/ABI/testing/configfs-usb-gadget-uac1 @@ -4,11 +4,13 @@ KernelVersion: 4.14 Description: The attributes: - c_chmask - capture channel mask - c_srate - capture sampling rate - c_ssize - capture sample size (bytes) - p_chmask - playback channel mask - p_srate - playback sampling rate - p_ssize - playback sample size (bytes) - req_number - the number of pre-allocated request - for both capture and playback + ========== =================================== + c_chmask capture channel mask + c_srate capture sampling rate + c_ssize capture sample size (bytes) + p_chmask playback channel mask + p_srate playback sampling rate + p_ssize playback sample size (bytes) + req_number the number of pre-allocated request + for both capture and playback + ========== =================================== diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uvc b/Documentation/ABI/testing/configfs-usb-gadget-uvc index 809765bd9573..cee81b0347bb 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uvc +++ b/Documentation/ABI/testing/configfs-usb-gadget-uvc @@ -3,9 +3,11 @@ Date: Dec 2014 KernelVersion: 4.0 Description: UVC function directory - streaming_maxburst - 0..15 (ss only) - streaming_maxpacket - 1..1023 (fs), 1..3072 (hs/ss) - streaming_interval - 1..16 + =================== ============================= + streaming_maxburst 0..15 (ss only) + streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss) + streaming_interval 1..16 + =================== ============================= What: /config/usb-gadget/gadget/functions/uvc.name/control Date: Dec 2014 @@ -13,8 +15,11 @@ KernelVersion: 4.0 Description: Control descriptors All attributes read only: - bInterfaceNumber - USB interface number for this - streaming interface + + ================ ============================= + bInterfaceNumber USB interface number for this + streaming interface + ================ ============================= What: /config/usb-gadget/gadget/functions/uvc.name/control/class Date: Dec 2014 @@ -47,13 +52,16 @@ KernelVersion: 4.0 Description: Default output terminal descriptors All attributes read only: - iTerminal - index of string descriptor - bSourceID - id of the terminal to which this terminal + + ============== ============================================= + iTerminal index of string descriptor + bSourceID id of the terminal to which this terminal is connected - bAssocTerminal - id of the input terminal to which this output + bAssocTerminal id of the input terminal to which this output terminal is associated - wTerminalType - terminal type - bTerminalID - a non-zero id of this terminal + wTerminalType terminal type + bTerminalID a non-zero id of this terminal + ============== ============================================= What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera Date: Dec 2014 @@ -66,16 +74,19 @@ KernelVersion: 4.0 Description: Default camera terminal descriptors All attributes read only: - bmControls - bitmap specifying which controls are - supported for the video stream - wOcularFocalLength - the value of Locular - wObjectiveFocalLengthMax- the value of Lmin - wObjectiveFocalLengthMin- the value of Lmax - iTerminal - index of string descriptor - bAssocTerminal - id of the output terminal to which - this terminal is connected - wTerminalType - terminal type - bTerminalID - a non-zero id of this terminal + + ======================== ==================================== + bmControls bitmap specifying which controls are + supported for the video stream + wOcularFocalLength the value of Locular + wObjectiveFocalLengthMax the value of Lmin + wObjectiveFocalLengthMin the value of Lmax + iTerminal index of string descriptor + bAssocTerminal id of the output terminal to which + this terminal is connected + wTerminalType terminal type + bTerminalID a non-zero id of this terminal + ======================== ==================================== What: /config/usb-gadget/gadget/functions/uvc.name/control/processing Date: Dec 2014 @@ -88,13 +99,16 @@ KernelVersion: 4.0 Description: Default processing unit descriptors All attributes read only: - iProcessing - index of string descriptor - bmControls - bitmap specifying which controls are + + =============== ======================================== + iProcessing index of string descriptor + bmControls bitmap specifying which controls are supported for the video stream - wMaxMultiplier - maximum digital magnification x100 - bSourceID - id of the terminal to which this unit is + wMaxMultiplier maximum digital magnification x100 + bSourceID id of the terminal to which this unit is connected - bUnitID - a non-zero id of this unit + bUnitID a non-zero id of this unit + =============== ======================================== What: /config/usb-gadget/gadget/functions/uvc.name/control/header Date: Dec 2014 @@ -114,8 +128,11 @@ KernelVersion: 4.0 Description: Streaming descriptors All attributes read only: - bInterfaceNumber - USB interface number for this - streaming interface + + ================ ============================= + bInterfaceNumber USB interface number for this + streaming interface + ================ ============================= What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class Date: Dec 2014 @@ -148,13 +165,16 @@ KernelVersion: 4.0 Description: Default color matching descriptors All attributes read only: - bMatrixCoefficients - matrix used to compute luma and - chroma values from the color primaries - bTransferCharacteristics- optoelectronic transfer - characteristic of the source picutre, - also called the gamma function - bColorPrimaries - color primaries and the reference - white + + ======================== ====================================== + bMatrixCoefficients matrix used to compute luma and + chroma values from the color primaries + bTransferCharacteristics optoelectronic transfer + characteristic of the source picutre, + also called the gamma function + bColorPrimaries color primaries and the reference + white + ======================== ====================================== What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg Date: Dec 2014 @@ -168,47 +188,52 @@ Description: Specific MJPEG format descriptors All attributes read only, except bmaControls and bDefaultFrameIndex: - bFormatIndex - unique id for this format descriptor; + + =================== ===================================== + bFormatIndex unique id for this format descriptor; only defined after parent header is linked into the streaming class; read-only - bmaControls - this format's data for bmaControls in + bmaControls this format's data for bmaControls in the streaming header - bmInterfaceFlags - specifies interlace information, + bmInterfaceFlags specifies interlace information, read-only - bAspectRatioY - the X dimension of the picture aspect + bAspectRatioY the X dimension of the picture aspect ratio, read-only - bAspectRatioX - the Y dimension of the picture aspect + bAspectRatioX the Y dimension of the picture aspect ratio, read-only - bmFlags - characteristics of this format, + bmFlags characteristics of this format, read-only - bDefaultFrameIndex - optimum frame index for this stream + bDefaultFrameIndex optimum frame index for this stream + =================== ===================================== What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name Date: Dec 2014 KernelVersion: 4.0 Description: Specific MJPEG frame descriptors - bFrameIndex - unique id for this framedescriptor; - only defined after parent format is - linked into the streaming header; - read-only - dwFrameInterval - indicates how frame interval can be - programmed; a number of values - separated by newline can be specified - dwDefaultFrameInterval - the frame interval the device would - like to use as default - dwMaxVideoFrameBufferSize- the maximum number of bytes the - compressor will produce for a video - frame or still image - dwMaxBitRate - the maximum bit rate at the shortest - frame interval in bps - dwMinBitRate - the minimum bit rate at the longest - frame interval in bps - wHeight - height of decoded bitmap frame in px - wWidth - width of decoded bitmam frame in px - bmCapabilities - still image support, fixed frame-rate - support + ========================= ===================================== + bFrameIndex unique id for this framedescriptor; + only defined after parent format is + linked into the streaming header; + read-only + dwFrameInterval indicates how frame interval can be + programmed; a number of values + separated by newline can be specified + dwDefaultFrameInterval the frame interval the device would + like to use as default + dwMaxVideoFrameBufferSize the maximum number of bytes the + compressor will produce for a video + frame or still image + dwMaxBitRate the maximum bit rate at the shortest + frame interval in bps + dwMinBitRate the minimum bit rate at the longest + frame interval in bps + wHeight height of decoded bitmap frame in px + wWidth width of decoded bitmam frame in px + bmCapabilities still image support, fixed frame-rate + support + ========================= ===================================== What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed Date: Dec 2014 @@ -220,50 +245,54 @@ Date: Dec 2014 KernelVersion: 4.0 Description: Specific uncompressed format descriptors - bFormatIndex - unique id for this format descriptor; + ================== ======================================= + bFormatIndex unique id for this format descriptor; only defined after parent header is linked into the streaming class; read-only - bmaControls - this format's data for bmaControls in + bmaControls this format's data for bmaControls in the streaming header - bmInterfaceFlags - specifies interlace information, + bmInterfaceFlags specifies interlace information, read-only - bAspectRatioY - the X dimension of the picture aspect + bAspectRatioY the X dimension of the picture aspect ratio, read-only - bAspectRatioX - the Y dimension of the picture aspect + bAspectRatioX the Y dimension of the picture aspect ratio, read-only - bDefaultFrameIndex - optimum frame index for this stream - bBitsPerPixel - number of bits per pixel used to + bDefaultFrameIndex optimum frame index for this stream + bBitsPerPixel number of bits per pixel used to specify color in the decoded video frame - guidFormat - globally unique id used to identify + guidFormat globally unique id used to identify stream-encoding format + ================== ======================================= What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name Date: Dec 2014 KernelVersion: 4.0 Description: Specific uncompressed frame descriptors - bFrameIndex - unique id for this framedescriptor; - only defined after parent format is - linked into the streaming header; - read-only - dwFrameInterval - indicates how frame interval can be - programmed; a number of values - separated by newline can be specified - dwDefaultFrameInterval - the frame interval the device would - like to use as default - dwMaxVideoFrameBufferSize- the maximum number of bytes the - compressor will produce for a video - frame or still image - dwMaxBitRate - the maximum bit rate at the shortest - frame interval in bps - dwMinBitRate - the minimum bit rate at the longest - frame interval in bps - wHeight - height of decoded bitmap frame in px - wWidth - width of decoded bitmam frame in px - bmCapabilities - still image support, fixed frame-rate - support + ========================= ===================================== + bFrameIndex unique id for this framedescriptor; + only defined after parent format is + linked into the streaming header; + read-only + dwFrameInterval indicates how frame interval can be + programmed; a number of values + separated by newline can be specified + dwDefaultFrameInterval the frame interval the device would + like to use as default + dwMaxVideoFrameBufferSize the maximum number of bytes the + compressor will produce for a video + frame or still image + dwMaxBitRate the maximum bit rate at the shortest + frame interval in bps + dwMinBitRate the minimum bit rate at the longest + frame interval in bps + wHeight height of decoded bitmap frame in px + wWidth width of decoded bitmam frame in px + bmCapabilities still image support, fixed frame-rate + support + ========================= ===================================== What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header Date: Dec 2014 @@ -276,17 +305,20 @@ KernelVersion: 4.0 Description: Specific streaming header descriptors All attributes read only: - bTriggerUsage - how the host software will respond to + + ==================== ===================================== + bTriggerUsage how the host software will respond to a hardware trigger interrupt event - bTriggerSupport - flag specifying if hardware + bTriggerSupport flag specifying if hardware triggering is supported - bStillCaptureMethod - method of still image caputre + bStillCaptureMethod method of still image caputre supported - bTerminalLink - id of the output terminal to which + bTerminalLink id of the output terminal to which the video endpoint of this interface is connected - bmInfo - capabilities of this video streaming + bmInfo capabilities of this video streaming interface + ==================== ===================================== What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name Date: May 2018 diff --git a/Documentation/ABI/testing/debugfs-ec b/Documentation/ABI/testing/debugfs-ec index 6546115a94da..ab6099daa8f5 100644 --- a/Documentation/ABI/testing/debugfs-ec +++ b/Documentation/ABI/testing/debugfs-ec @@ -6,7 +6,7 @@ Description: General information like which GPE is assigned to the EC and whether the global lock should get used. Knowing the EC GPE one can watch the amount of HW events related to -the EC here (XY -> GPE number from /sys/kernel/debug/ec/*/gpe): +the EC here (XY -> GPE number from `/sys/kernel/debug/ec/*/gpe`): /sys/firmware/acpi/interrupts/gpeXY The io file is binary and a userspace tool located here: @@ -14,7 +14,8 @@ ftp://ftp.suse.com/pub/people/trenn/sources/ec/ should get used to read out the 256 Embedded Controller registers or writing to them. -CAUTION: Do not write to the Embedded Controller if you don't know -what you are doing! Rebooting afterwards also is a good idea. -This can influence the way your machine is cooled and fans may -not get switched on again after you did a wrong write. +CAUTION: + Do not write to the Embedded Controller if you don't know + what you are doing! Rebooting afterwards also is a good idea. + This can influence the way your machine is cooled and fans may + not get switched on again after you did a wrong write. diff --git a/Documentation/ABI/testing/debugfs-pktcdvd b/Documentation/ABI/testing/debugfs-pktcdvd index cf11736acb76..787907d70462 100644 --- a/Documentation/ABI/testing/debugfs-pktcdvd +++ b/Documentation/ABI/testing/debugfs-pktcdvd @@ -4,16 +4,15 @@ KernelVersion: 2.6.20 Contact: Thomas Maier <balagi@justmail.de> Description: -debugfs interface ------------------ - The pktcdvd module (packet writing driver) creates these files in debugfs: /sys/kernel/debug/pktcdvd/pktcdvd[0-7]/ + + ==== ====== ==================================== info (0444) Lots of driver statistics and infos. + ==== ====== ==================================== -Example: -------- +Example:: -cat /sys/kernel/debug/pktcdvd/pktcdvd0/info + cat /sys/kernel/debug/pktcdvd/pktcdvd0/info diff --git a/Documentation/ABI/testing/dev-kmsg b/Documentation/ABI/testing/dev-kmsg index 3c0bb76e3417..a377b6c093c9 100644 --- a/Documentation/ABI/testing/dev-kmsg +++ b/Documentation/ABI/testing/dev-kmsg @@ -6,6 +6,7 @@ Description: The /dev/kmsg character device node provides userspace access to the kernel's printk buffer. Injecting messages: + Every write() to the opened device node places a log entry in the kernel's printk buffer. @@ -21,6 +22,7 @@ Description: The /dev/kmsg character device node provides userspace access the messages can always be reliably determined. Accessing the buffer: + Every read() from the opened device node receives one record of the kernel's printk buffer. @@ -48,6 +50,7 @@ Description: The /dev/kmsg character device node provides userspace access if needed, without limiting the interface to a single reader. The device supports seek with the following parameters: + SEEK_SET, 0 seek to the first entry in the buffer SEEK_END, 0 @@ -87,18 +90,22 @@ Description: The /dev/kmsg character device node provides userspace access readable context of the message, for reliable processing in userspace. - Example: - 7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored) - SUBSYSTEM=acpi - DEVICE=+acpi:PNP0A03:00 - 6,339,5140900,-;NET: Registered protocol family 10 - 30,340,5690716,-;udevd[80]: starting version 181 + Example:: + + 7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored) + SUBSYSTEM=acpi + DEVICE=+acpi:PNP0A03:00 + 6,339,5140900,-;NET: Registered protocol family 10 + 30,340,5690716,-;udevd[80]: starting version 181 The DEVICE= key uniquely identifies devices the following way: - b12:8 - block dev_t - c127:3 - char dev_t - n8 - netdev ifindex - +sound:card0 - subsystem:devname + + ============ ================= + b12:8 block dev_t + c127:3 char dev_t + n8 netdev ifindex + +sound:card0 subsystem:devname + ============ ================= The flags field carries '-' by default. A 'c' indicates a fragment of a line. Note, that these hints about continuation diff --git a/Documentation/ABI/testing/evm b/Documentation/ABI/testing/evm index 201d10319fa1..3c477ba48a31 100644 --- a/Documentation/ABI/testing/evm +++ b/Documentation/ABI/testing/evm @@ -17,26 +17,33 @@ Description: echoing a value to <securityfs>/evm made up of the following bits: + === ================================================== Bit Effect + === ================================================== 0 Enable HMAC validation and creation 1 Enable digital signature validation 2 Permit modification of EVM-protected metadata at runtime. Not supported if HMAC validation and creation is enabled. 31 Disable further runtime modification of EVM policy + === ================================================== - For example: + For example:: - echo 1 ><securityfs>/evm + echo 1 ><securityfs>/evm will enable HMAC validation and creation - echo 0x80000003 ><securityfs>/evm + :: + + echo 0x80000003 ><securityfs>/evm will enable HMAC and digital signature validation and HMAC creation and disable all further modification of policy. - echo 0x80000006 ><securityfs>/evm + :: + + echo 0x80000006 ><securityfs>/evm will enable digital signature validation, permit modification of EVM-protected metadata and @@ -65,7 +72,7 @@ Description: Shows the set of extended attributes used to calculate or validate the EVM signature, and allows additional attributes to be added at runtime. Any signatures generated after - additional attributes are added (and on files posessing those + additional attributes are added (and on files possessing those additional attributes) will only be valid if the same additional attributes are configured on system boot. Writing a single period (.) will lock the xattr list from any further diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy index cd572912c593..e35263f97fc1 100644 --- a/Documentation/ABI/testing/ima_policy +++ b/Documentation/ABI/testing/ima_policy @@ -15,19 +15,22 @@ Description: IMA appraisal, if configured, uses these file measurements for local measurement appraisal. - rule format: action [condition ...] + :: - action: measure | dont_measure | appraise | dont_appraise | - audit | hash | dont_hash - condition:= base | lsm [option] + rule format: action [condition ...] + + action: measure | dont_measure | appraise | dont_appraise | + audit | hash | dont_hash + condition:= base | lsm [option] base: [[func=] [mask=] [fsmagic=] [fsuuid=] [uid=] [euid=] [fowner=] [fsname=]] lsm: [[subj_user=] [subj_role=] [subj_type=] [obj_user=] [obj_role=] [obj_type=]] option: [[appraise_type=]] [template=] [permit_directio] [appraise_flag=] [keyrings=] - base: func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK][MODULE_CHECK] - [FIRMWARE_CHECK] + base: + func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK]MODULE_CHECK] + [FIRMWARE_CHECK] [KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK] [KEXEC_CMDLINE] [KEY_CHECK] mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND] @@ -37,8 +40,9 @@ Description: uid:= decimal value euid:= decimal value fowner:= decimal value - lsm: are LSM specific - option: appraise_type:= [imasig] [imasig|modsig] + lsm: are LSM specific + option: + appraise_type:= [imasig] [imasig|modsig] appraise_flag:= [check_blacklist] Currently, blacklist check is only for files signed with appended signature. @@ -49,7 +53,7 @@ Description: (eg, ima-ng). Only valid when action is "measure". pcr:= decimal value - default policy: + default policy: # PROC_SUPER_MAGIC dont_measure fsmagic=0x9fa0 dont_appraise fsmagic=0x9fa0 @@ -97,7 +101,8 @@ Description: Examples of LSM specific definitions: - SELinux: + SELinux:: + dont_measure obj_type=var_log_t dont_appraise obj_type=var_log_t dont_measure obj_type=auditd_log_t @@ -105,10 +110,11 @@ Description: measure subj_user=system_u func=FILE_CHECK mask=MAY_READ measure subj_role=system_r func=FILE_CHECK mask=MAY_READ - Smack: + Smack:: + measure subj_user=_ func=FILE_CHECK mask=MAY_READ - Example of measure rules using alternate PCRs: + Example of measure rules using alternate PCRs:: measure func=KEXEC_KERNEL_CHECK pcr=4 measure func=KEXEC_INITRAMFS_CHECK pcr=5 diff --git a/Documentation/ABI/testing/procfs-diskstats b/Documentation/ABI/testing/procfs-diskstats index 70dcaf2481f4..df5a3a8c1edf 100644 --- a/Documentation/ABI/testing/procfs-diskstats +++ b/Documentation/ABI/testing/procfs-diskstats @@ -6,28 +6,32 @@ Description: of block devices. Each line contains the following 14 fields: - 1 - major number - 2 - minor mumber - 3 - device name - 4 - reads completed successfully - 5 - reads merged - 6 - sectors read - 7 - time spent reading (ms) - 8 - writes completed - 9 - writes merged - 10 - sectors written - 11 - time spent writing (ms) - 12 - I/Os currently in progress - 13 - time spent doing I/Os (ms) - 14 - weighted time spent doing I/Os (ms) + == =================================== + 1 major number + 2 minor mumber + 3 device name + 4 reads completed successfully + 5 reads merged + 6 sectors read + 7 time spent reading (ms) + 8 writes completed + 9 writes merged + 10 sectors written + 11 time spent writing (ms) + 12 I/Os currently in progress + 13 time spent doing I/Os (ms) + 14 weighted time spent doing I/Os (ms) + == =================================== Kernel 4.18+ appends four more fields for discard tracking putting the total at 18: - 15 - discards completed successfully - 16 - discards merged - 17 - sectors discarded - 18 - time spent discarding + == =================================== + 15 discards completed successfully + 16 discards merged + 17 sectors discarded + 18 time spent discarding + == =================================== Kernel 5.5+ appends two more fields for flush requests: diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index 2322eb748b38..e34cdeeeb9d4 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -4,23 +4,27 @@ Contact: Jerome Marchand <jmarchan@redhat.com> Description: The /sys/block/<disk>/stat files displays the I/O statistics of disk <disk>. They contain 11 fields: - 1 - reads completed successfully - 2 - reads merged - 3 - sectors read - 4 - time spent reading (ms) - 5 - writes completed - 6 - writes merged - 7 - sectors written - 8 - time spent writing (ms) - 9 - I/Os currently in progress - 10 - time spent doing I/Os (ms) - 11 - weighted time spent doing I/Os (ms) - 12 - discards completed - 13 - discards merged - 14 - sectors discarded - 15 - time spent discarding (ms) - 16 - flush requests completed - 17 - time spent flushing (ms) + + == ============================================== + 1 reads completed successfully + 2 reads merged + 3 sectors read + 4 time spent reading (ms) + 5 writes completed + 6 writes merged + 7 sectors written + 8 time spent writing (ms) + 9 I/Os currently in progress + 10 time spent doing I/Os (ms) + 11 weighted time spent doing I/Os (ms) + 12 discards completed + 13 discards merged + 14 sectors discarded + 15 time spent discarding (ms) + 16 flush requests completed + 17 time spent flushing (ms) + == ============================================== + For more details refer Documentation/admin-guide/iostats.rst diff --git a/Documentation/ABI/testing/sysfs-block-device b/Documentation/ABI/testing/sysfs-block-device index 17f2bc7dd261..aa0fb500e3c9 100644 --- a/Documentation/ABI/testing/sysfs-block-device +++ b/Documentation/ABI/testing/sysfs-block-device @@ -8,11 +8,13 @@ Description: It has the following valid values: + == ======================================================== 0 OFF - the LED is not activated on activity 1 BLINK_ON - the LED blinks on every 10ms when activity is detected. 2 BLINK_OFF - the LED is on when idle, and blinks off every 10ms when activity is detected. + == ======================================================== Note that the user must turn sw_activity OFF it they wish to control the activity LED via the em_message file. diff --git a/Documentation/ABI/testing/sysfs-bus-acpi b/Documentation/ABI/testing/sysfs-bus-acpi index e7898cfe5fb1..c78603497b97 100644 --- a/Documentation/ABI/testing/sysfs-bus-acpi +++ b/Documentation/ABI/testing/sysfs-bus-acpi @@ -67,14 +67,16 @@ Description: The return value is a decimal integer representing the device's status bitmap: - Bit [0] – Set if the device is present. - Bit [1] – Set if the device is enabled and decoding its - resources. - Bit [2] – Set if the device should be shown in the UI. - Bit [3] – Set if the device is functioning properly (cleared if - device failed its diagnostics). - Bit [4] – Set if the battery is present. - Bits [31:5] – Reserved (must be cleared) + =========== ================================================== + Bit [0] Set if the device is present. + Bit [1] Set if the device is enabled and decoding its + resources. + Bit [2] Set if the device should be shown in the UI. + Bit [3] Set if the device is functioning properly (cleared + if device failed its diagnostics). + Bit [4] Set if the battery is present. + Bits [31:5] Reserved (must be cleared) + =========== ================================================== If bit [0] is clear, then bit 1 must also be clear (a device that is not present cannot be enabled). diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-format b/Documentation/ABI/testing/sysfs-bus-event_source-devices-format index 5bb793ec926c..df7ccc1b2fba 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-format +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-format @@ -10,7 +10,8 @@ Description: name/value pairs. Userspace must be prepared for the possibility that attributes - define overlapping bit ranges. For example: + define overlapping bit ranges. For example:: + attr1 = 'config:0-23' attr2 = 'config:0-7' attr3 = 'config:12-35' diff --git a/Documentation/ABI/testing/sysfs-bus-i2c-devices-pca954x b/Documentation/ABI/testing/sysfs-bus-i2c-devices-pca954x index 0b0de8cd0d13..b6c69eb80ca4 100644 --- a/Documentation/ABI/testing/sysfs-bus-i2c-devices-pca954x +++ b/Documentation/ABI/testing/sysfs-bus-i2c-devices-pca954x @@ -6,15 +6,18 @@ Description: Value that exists only for mux devices that can be written to control the behaviour of the multiplexer on idle. Possible values: - -2 - disconnect on idle, i.e. deselect the last used - channel, which is useful when there is a device - with an address that conflicts with another - device on another mux on the same parent bus. - -1 - leave the mux as-is, which is the most optimal - setting in terms of I2C operations and is the - default mode. - 0..<nchans> - set the mux to a predetermined channel, - which is useful if there is one channel that is - used almost always, and you want to reduce the - latency for normal operations after rare - transactions on other channels + + =========== =============================================== + -2 disconnect on idle, i.e. deselect the last used + channel, which is useful when there is a device + with an address that conflicts with another + device on another mux on the same parent bus. + -1 leave the mux as-is, which is the most optimal + setting in terms of I2C operations and is the + default mode. + 0..<nchans> set the mux to a predetermined channel, + which is useful if there is one channel that is + used almost always, and you want to reduce the + latency for normal operations after rare + transactions on other channels + =========== =============================================== diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index a9d51810a3ba..e3df71987eff 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -65,6 +65,7 @@ Contact: linux-iio@vger.kernel.org Description: When the internal sampling clock can only take a specific set of frequencies, we can specify the available values with: + - a small discrete set of values like "0 2 4 6 8" - a range with minimum, step and maximum frequencies like "[min step max]" @@ -1627,17 +1628,21 @@ Description: Mounting matrix for IIO sensors. This is a rotation matrix which informs userspace about sensor chip's placement relative to the main hardware it is mounted on. + Main hardware placement is defined according to the local reference frame related to the physical quantity the sensor measures. + Given that the rotation matrix is defined in a board specific way (platform data and / or device-tree), the main hardware reference frame definition is left to the implementor's choice (see below for a magnetometer example). + Applications should apply this rotation matrix to samples so that when main hardware reference frame is aligned onto local reference frame, then sensor chip reference frame is also perfectly aligned with it. + Matrix is a 3x3 unitary matrix and typically looks like [0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix [1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware @@ -1646,8 +1651,10 @@ Description: For example, a mounting matrix for a magnetometer sensor informs userspace about sensor chip's ORIENTATION relative to the main hardware. + More specifically, main hardware orientation is defined with respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where : + * Y is in the ground plane and positive towards magnetic North ; * X is in the ground plane, perpendicular to the North axis and positive towards the East ; @@ -1656,13 +1663,16 @@ Description: An implementor might consider that for a hand-held device, a 'natural' orientation would be 'front facing camera at the top'. The main hardware reference frame could then be described as : + * Y is in the plane of the screen and is positive towards the top of the screen ; * X is in the plane of the screen, perpendicular to Y axis, and positive towards the right hand side of the screen ; * Z is perpendicular to the screen plane and positive out of the screen. + Another example for a quadrotor UAV might be : + * Y is in the plane of the propellers and positive towards the front-view camera; * X is in the plane of the propellers, perpendicular to Y axis, @@ -1704,6 +1714,7 @@ Description: This interface is deprecated; please use the Counter subsystem. A list of possible counting directions which are: + - "up" : counter device is increasing. - "down": counter device is decreasing. diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector b/Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector index 2071f9bcfaa5..1c2a07f7a75e 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector @@ -5,7 +5,8 @@ Contact: Peter Rosin <peda@axentia.se> Description: The DAC is used to find the peak level of an alternating voltage input signal by a binary search using the output - of a comparator wired to an interrupt pin. Like so: + of a comparator wired to an interrupt pin. Like so:: + _ | \ input +------>-------|+ \ @@ -19,10 +20,12 @@ Description: | irq|------<-------' | | '-------' + The boolean invert attribute (0/1) should be set when the input signal is centered around the maximum value of the dac instead of zero. The envelope detector will search from below in this case and will also invert the result. + The edge/level of the interrupt is also switched to its opposite value. diff --git a/Documentation/ABI/testing/sysfs-bus-iio-cros-ec b/Documentation/ABI/testing/sysfs-bus-iio-cros-ec index 6158f831c761..adf24c40126f 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-cros-ec +++ b/Documentation/ABI/testing/sysfs-bus-iio-cros-ec @@ -4,7 +4,7 @@ KernelVersion: 4.7 Contact: linux-iio@vger.kernel.org Description: Writing '1' will perform a FOC (Fast Online Calibration). The - corresponding calibration offsets can be read from *_calibbias + corresponding calibration offsets can be read from `*_calibbias` entries. What: /sys/bus/iio/devices/iio:deviceX/location diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32 index 0e66ae9b0071..91439d6d60b5 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32 +++ b/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32 @@ -3,14 +3,20 @@ KernelVersion: 4.14 Contact: arnaud.pouliquen@st.com Description: For audio purpose only. + Used by audio driver to set/get the spi input frequency. + This is mandatory if DFSDM is slave on SPI bus, to provide information on the SPI clock frequency during runtime Notice that the SPI frequency should be a multiple of sample frequency to ensure the precision. - if DFSDM input is SPI master + + if DFSDM input is SPI master: + Reading SPI clkout frequency, error on writing + If DFSDM input is SPI Slave: + Reading returns value previously set. Writing value before starting conversions. diff --git a/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 index ad2cc63e4bf8..73498ff666bd 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 +++ b/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 @@ -17,9 +17,11 @@ KernelVersion: 4.13 Contact: fabrice.gasnier@st.com Description: Configure the device counter quadrature modes: + - non-quadrature: Encoder IN1 input servers as the count input (up direction). + - quadrature: Encoder IN1 and IN2 inputs are mixed to get direction and count. @@ -35,23 +37,26 @@ KernelVersion: 4.13 Contact: fabrice.gasnier@st.com Description: Configure the device encoder/counter active edge: + - rising-edge - falling-edge - both-edges In non-quadrature mode, device counts up on active edge. + In quadrature mode, encoder counting scenarios are as follows: - ---------------------------------------------------------------- + + +---------+----------+--------------------+--------------------+ | Active | Level on | IN1 signal | IN2 signal | - | edge | opposite |------------------------------------------ + | edge | opposite +----------+---------+----------+---------+ | | signal | Rising | Falling | Rising | Falling | - ---------------------------------------------------------------- - | Rising | High -> | Down | - | Up | - | - | edge | Low -> | Up | - | Down | - | - ---------------------------------------------------------------- - | Falling | High -> | - | Up | - | Down | - | edge | Low -> | - | Down | - | Up | - ---------------------------------------------------------------- - | Both | High -> | Down | Up | Up | Down | - | edges | Low -> | Up | Down | Down | Up | - ---------------------------------------------------------------- + +---------+----------+----------+---------+----------+---------+ + | Rising | High -> | Down | - | Up | - | + | edge | Low -> | Up | - | Down | - | + +---------+----------+----------+---------+----------+---------+ + | Falling | High -> | - | Up | - | Down | + | edge | Low -> | - | Down | - | Up | + +---------+----------+----------+---------+----------+---------+ + | Both | High -> | Down | Up | Up | Down | + | edges | Low -> | Up | Down | Down | Up | + +---------+----------+----------+---------+----------+---------+ diff --git a/Documentation/ABI/testing/sysfs-bus-iio-magnetometer-hmc5843 b/Documentation/ABI/testing/sysfs-bus-iio-magnetometer-hmc5843 index 6275e9f56e6c..13f099ef6a95 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-magnetometer-hmc5843 +++ b/Documentation/ABI/testing/sysfs-bus-iio-magnetometer-hmc5843 @@ -5,11 +5,16 @@ Contact: linux-iio@vger.kernel.org Description: Current configuration and available configurations for the bias current. - normal - Normal measurement configurations (default) - positivebias - Positive bias configuration - negativebias - Negative bias configuration - disabled - Only available on HMC5983. Disables magnetic + + ============ ============================================ + normal Normal measurement configurations (default) + positivebias Positive bias configuration + negativebias Negative bias configuration + disabled Only available on HMC5983. Disables magnetic sensor and enables temperature sensor. - Note: The effect of this configuration may vary - according to the device. For exact documentation - check the device's datasheet. + ============ ============================================ + + Note: + The effect of this configuration may vary + according to the device. For exact documentation + check the device's datasheet. diff --git a/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 b/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 index 3b3509a3ef2f..e5ef6d8e5da1 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 +++ b/Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856 @@ -5,9 +5,12 @@ Description: Open-circuit fault. The detection of open-circuit faults, such as those caused by broken thermocouple wires. Reading returns either '1' or '0'. - '1' = An open circuit such as broken thermocouple wires - has been detected. - '0' = No open circuit or broken thermocouple wires are detected + + === ======================================================= + '1' An open circuit such as broken thermocouple wires + has been detected. + '0' No open circuit or broken thermocouple wires are detected + === ======================================================= What: /sys/bus/iio/devices/iio:deviceX/fault_ovuv KernelVersion: 5.1 @@ -18,7 +21,11 @@ Description: cables by integrated MOSFETs at the T+ and T- inputs, and the BIAS output. These MOSFETs turn off when the input voltage is negative or greater than VDD. + Reading returns either '1' or '0'. - '1' = The input voltage is negative or greater than VDD. - '0' = The input voltage is positive and less than VDD (normal - state). + + === ======================================================= + '1' The input voltage is negative or greater than VDD. + '0' The input voltage is positive and less than VDD (normal + state). + === ======================================================= diff --git a/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 index b7259234ad70..a10a4de3e5fe 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 +++ b/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 @@ -3,67 +3,85 @@ KernelVersion: 4.11 Contact: benjamin.gaignard@st.com Description: Reading returns the list possible master modes which are: - - "reset" : The UG bit from the TIMx_EGR register is + + + - "reset" + The UG bit from the TIMx_EGR register is used as trigger output (TRGO). - - "enable" : The Counter Enable signal CNT_EN is used + - "enable" + The Counter Enable signal CNT_EN is used as trigger output. - - "update" : The update event is selected as trigger output. + - "update" + The update event is selected as trigger output. For instance a master timer can then be used as a prescaler for a slave timer. - - "compare_pulse" : The trigger output send a positive pulse - when the CC1IF flag is to be set. - - "OC1REF" : OC1REF signal is used as trigger output. - - "OC2REF" : OC2REF signal is used as trigger output. - - "OC3REF" : OC3REF signal is used as trigger output. - - "OC4REF" : OC4REF signal is used as trigger output. + - "compare_pulse" + The trigger output send a positive pulse + when the CC1IF flag is to be set. + - "OC1REF" + OC1REF signal is used as trigger output. + - "OC2REF" + OC2REF signal is used as trigger output. + - "OC3REF" + OC3REF signal is used as trigger output. + - "OC4REF" + OC4REF signal is used as trigger output. + Additional modes (on TRGO2 only): - - "OC5REF" : OC5REF signal is used as trigger output. - - "OC6REF" : OC6REF signal is used as trigger output. + + - "OC5REF" + OC5REF signal is used as trigger output. + - "OC6REF" + OC6REF signal is used as trigger output. - "compare_pulse_OC4REF": - OC4REF rising or falling edges generate pulses. + OC4REF rising or falling edges generate pulses. - "compare_pulse_OC6REF": - OC6REF rising or falling edges generate pulses. + OC6REF rising or falling edges generate pulses. - "compare_pulse_OC4REF_r_or_OC6REF_r": - OC4REF or OC6REF rising edges generate pulses. + OC4REF or OC6REF rising edges generate pulses. - "compare_pulse_OC4REF_r_or_OC6REF_f": - OC4REF rising or OC6REF falling edges generate pulses. + OC4REF rising or OC6REF falling edges generate + pulses. - "compare_pulse_OC5REF_r_or_OC6REF_r": - OC5REF or OC6REF rising edges generate pulses. + OC5REF or OC6REF rising edges generate pulses. - "compare_pulse_OC5REF_r_or_OC6REF_f": - OC5REF rising or OC6REF falling edges generate pulses. - - +-----------+ +-------------+ +---------+ - | Prescaler +-> | Counter | +-> | Master | TRGO(2) - +-----------+ +--+--------+-+ |-> | Control +--> - | | || +---------+ - +--v--------+-+ OCxREF || +---------+ - | Chx compare +----------> | Output | ChX - +-----------+-+ | | Control +--> - . | | +---------+ - . | | . - +-----------v-+ OC6REF | . - | Ch6 compare +---------+> - +-------------+ - - Example with: "compare_pulse_OC4REF_r_or_OC6REF_r": - - X - X X - X . . X - X . . X - X . . X - count X . . . . X - . . . . - . . . . - +---------------+ - OC4REF | . . | - +-+ . . +-+ - . +---+ . - OC6REF . | | . - +-------+ +-------+ - +-+ +-+ - TRGO2 | | | | - +-+ +---+ +---------+ + OC5REF rising or OC6REF falling edges generate + pulses. + + :: + + +-----------+ +-------------+ +---------+ + | Prescaler +-> | Counter | +-> | Master | TRGO(2) + +-----------+ +--+--------+-+ |-> | Control +--> + | | || +---------+ + +--v--------+-+ OCxREF || +---------+ + | Chx compare +----------> | Output | ChX + +-----------+-+ | | Control +--> + . | | +---------+ + . | | . + +-----------v-+ OC6REF | . + | Ch6 compare +---------+> + +-------------+ + + Example with: "compare_pulse_OC4REF_r_or_OC6REF_r":: + + X + X X + X . . X + X . . X + X . . X + count X . . . . X + . . . . + . . . . + +---------------+ + OC4REF | . . | + +-+ . . +-+ + . +---+ . + OC6REF . | | . + +-------+ +-------+ + +-+ +-+ + TRGO2 | | | | + +-+ +---+ +---------+ What: /sys/bus/iio/devices/triggerX/master_mode KernelVersion: 4.11 @@ -91,6 +109,30 @@ Description: When counting down the counter start from preset value and fire event when reach 0. +What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available +KernelVersion: 4.12 +Contact: benjamin.gaignard@st.com +Description: + Reading returns the list possible quadrature modes. + +What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode +KernelVersion: 4.12 +Contact: benjamin.gaignard@st.com +Description: + Configure the device counter quadrature modes: + + channel_A: + Encoder A input servers as the count input and B as + the UP/DOWN direction control input. + + channel_B: + Encoder B input serves as the count input and A as + the UP/DOWN direction control input. + + quadrature: + Encoder A and B inputs are mixed to get direction + and count with a scale of 0.25. + What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available KernelVersion: 4.12 Contact: benjamin.gaignard@st.com @@ -104,6 +146,7 @@ Description: Configure the device counter enable modes, in all case counting direction is set by in_count0_count_direction attribute and the counter is clocked by the internal clock. + always: Counter is always ON. diff --git a/Documentation/ABI/testing/sysfs-bus-intel_th-devices-msc b/Documentation/ABI/testing/sysfs-bus-intel_th-devices-msc index 7fd2601c2831..a74252e580a5 100644 --- a/Documentation/ABI/testing/sysfs-bus-intel_th-devices-msc +++ b/Documentation/ABI/testing/sysfs-bus-intel_th-devices-msc @@ -9,11 +9,13 @@ Date: June 2015 KernelVersion: 4.3 Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> Description: (RW) Configure MSC operating mode: + - "single", for contiguous buffer mode (high-order alloc); - "multi", for multiblock mode; - "ExI", for DCI handler mode; - "debug", for debug mode; - any of the currently loaded buffer sinks. + If operating mode changes, existing buffer is deallocated, provided there are no active users and tracing is not enabled, otherwise the write will fail. @@ -23,10 +25,12 @@ Date: June 2015 KernelVersion: 4.3 Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> Description: (RW) Configure MSC buffer size for "single" or "multi" modes. + In single mode, this is a single number of pages, has to be power of 2. In multiblock mode, this is a comma-separated list of numbers of pages for each window to be allocated. Number of windows is not limited. + Writing to this file deallocates existing buffer (provided there are no active users and tracing is not enabled) and then allocates a new one. diff --git a/Documentation/ABI/testing/sysfs-bus-nfit b/Documentation/ABI/testing/sysfs-bus-nfit index e4f76e7eab93..63ef0b9ecce7 100644 --- a/Documentation/ABI/testing/sysfs-bus-nfit +++ b/Documentation/ABI/testing/sysfs-bus-nfit @@ -1,4 +1,4 @@ -For all of the nmem device attributes under nfit/*, see the 'NVDIMM Firmware +For all of the nmem device attributes under ``nfit/*``, see the 'NVDIMM Firmware Interface Table (NFIT)' section in the ACPI specification (http://www.uefi.org/specifications) for more details. diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats index 3c9a8c4a25eb..860db53037a5 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats +++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats @@ -1,6 +1,6 @@ -========================== PCIe Device AER statistics -========================== +-------------------------- + These attributes show up under all the devices that are AER capable. These statistical counters indicate the errors "as seen/reported by the device". Note that this may mean that if an endpoint is causing problems, the AER @@ -17,19 +17,18 @@ Description: List of correctable errors seen and reported by this PCI device using ERR_COR. Note that since multiple errors may be reported using a single ERR_COR message, thus TOTAL_ERR_COR at the end of the file may not match the actual - total of all the errors in the file. Sample output: -------------------------------------------------------------------------- -localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable -Receiver Error 2 -Bad TLP 0 -Bad DLLP 0 -RELAY_NUM Rollover 0 -Replay Timer Timeout 0 -Advisory Non-Fatal 0 -Corrected Internal Error 0 -Header Log Overflow 0 -TOTAL_ERR_COR 2 -------------------------------------------------------------------------- + total of all the errors in the file. Sample output:: + + localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable + Receiver Error 2 + Bad TLP 0 + Bad DLLP 0 + RELAY_NUM Rollover 0 + Replay Timer Timeout 0 + Advisory Non-Fatal 0 + Corrected Internal Error 0 + Header Log Overflow 0 + TOTAL_ERR_COR 2 What: /sys/bus/pci/devices/<dev>/aer_dev_fatal Date: July 2018 @@ -39,28 +38,27 @@ Description: List of uncorrectable fatal errors seen and reported by this PCI device using ERR_FATAL. Note that since multiple errors may be reported using a single ERR_FATAL message, thus TOTAL_ERR_FATAL at the end of the file may not match the actual - total of all the errors in the file. Sample output: -------------------------------------------------------------------------- -localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal -Undefined 0 -Data Link Protocol 0 -Surprise Down Error 0 -Poisoned TLP 0 -Flow Control Protocol 0 -Completion Timeout 0 -Completer Abort 0 -Unexpected Completion 0 -Receiver Overflow 0 -Malformed TLP 0 -ECRC 0 -Unsupported Request 0 -ACS Violation 0 -Uncorrectable Internal Error 0 -MC Blocked TLP 0 -AtomicOp Egress Blocked 0 -TLP Prefix Blocked Error 0 -TOTAL_ERR_FATAL 0 -------------------------------------------------------------------------- + total of all the errors in the file. Sample output:: + + localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal + Undefined 0 + Data Link Protocol 0 + Surprise Down Error 0 + Poisoned TLP 0 + Flow Control Protocol 0 + Completion Timeout 0 + Completer Abort 0 + Unexpected Completion 0 + Receiver Overflow 0 + Malformed TLP 0 + ECRC 0 + Unsupported Request 0 + ACS Violation 0 + Uncorrectable Internal Error 0 + MC Blocked TLP 0 + AtomicOp Egress Blocked 0 + TLP Prefix Blocked Error 0 + TOTAL_ERR_FATAL 0 What: /sys/bus/pci/devices/<dev>/aer_dev_nonfatal Date: July 2018 @@ -70,32 +68,31 @@ Description: List of uncorrectable nonfatal errors seen and reported by this PCI device using ERR_NONFATAL. Note that since multiple errors may be reported using a single ERR_FATAL message, thus TOTAL_ERR_NONFATAL at the end of the file may not match the - actual total of all the errors in the file. Sample output: -------------------------------------------------------------------------- -localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal -Undefined 0 -Data Link Protocol 0 -Surprise Down Error 0 -Poisoned TLP 0 -Flow Control Protocol 0 -Completion Timeout 0 -Completer Abort 0 -Unexpected Completion 0 -Receiver Overflow 0 -Malformed TLP 0 -ECRC 0 -Unsupported Request 0 -ACS Violation 0 -Uncorrectable Internal Error 0 -MC Blocked TLP 0 -AtomicOp Egress Blocked 0 -TLP Prefix Blocked Error 0 -TOTAL_ERR_NONFATAL 0 -------------------------------------------------------------------------- + actual total of all the errors in the file. Sample output:: + + localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal + Undefined 0 + Data Link Protocol 0 + Surprise Down Error 0 + Poisoned TLP 0 + Flow Control Protocol 0 + Completion Timeout 0 + Completer Abort 0 + Unexpected Completion 0 + Receiver Overflow 0 + Malformed TLP 0 + ECRC 0 + Unsupported Request 0 + ACS Violation 0 + Uncorrectable Internal Error 0 + MC Blocked TLP 0 + AtomicOp Egress Blocked 0 + TLP Prefix Blocked Error 0 + TOTAL_ERR_NONFATAL 0 -============================ PCIe Rootport AER statistics -============================ +---------------------------- + These attributes show up under only the rootports (or root complex event collectors) that are AER capable. These indicate the number of error messages as "reported to" the rootport. Please note that the rootports also transmit diff --git a/Documentation/ABI/testing/sysfs-bus-rapidio b/Documentation/ABI/testing/sysfs-bus-rapidio index 13208b27dd87..634ea207a50a 100644 --- a/Documentation/ABI/testing/sysfs-bus-rapidio +++ b/Documentation/ABI/testing/sysfs-bus-rapidio @@ -4,24 +4,27 @@ Description: an individual subdirectory with the following name format of device_name "nn:d:iiii", where: - nn - two-digit hexadecimal ID of RapidIO network where the + ==== ======================================================== + nn two-digit hexadecimal ID of RapidIO network where the device resides - d - device type: 'e' - for endpoint or 's' - for switch - iiii - four-digit device destID for endpoints, or switchID for + d device type: 'e' - for endpoint or 's' - for switch + iiii four-digit device destID for endpoints, or switchID for switches + ==== ======================================================== For example, below is a list of device directories that represents a typical RapidIO network with one switch, one host, and two agent endpoints, as it is seen by the enumerating host - (with destID = 1): + (with destID = 1):: - /sys/bus/rapidio/devices/00:e:0000 - /sys/bus/rapidio/devices/00:e:0002 - /sys/bus/rapidio/devices/00:s:0001 + /sys/bus/rapidio/devices/00:e:0000 + /sys/bus/rapidio/devices/00:e:0002 + /sys/bus/rapidio/devices/00:s:0001 - NOTE: An enumerating or discovering endpoint does not create a - sysfs entry for itself, this is why an endpoint with destID=1 is - not shown in the list. + NOTE: + An enumerating or discovering endpoint does not create a + sysfs entry for itself, this is why an endpoint with destID=1 + is not shown in the list. Attributes Common for All RapidIO Devices ----------------------------------------- diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt index dd565c378b40..171127294674 100644 --- a/Documentation/ABI/testing/sysfs-bus-thunderbolt +++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt @@ -37,16 +37,18 @@ Contact: thunderbolt-software@lists.01.org Description: This attribute holds current Thunderbolt security level set by the system BIOS. Possible values are: - none: All devices are automatically authorized - user: Devices are only authorized based on writing - appropriate value to the authorized attribute - secure: Require devices that support secure connect at - minimum. User needs to authorize each device. - dponly: Automatically tunnel Display port (and USB). No - PCIe tunnels are created. - usbonly: Automatically tunnel USB controller of the + ======= ================================================== + none All devices are automatically authorized + user Devices are only authorized based on writing + appropriate value to the authorized attribute + secure Require devices that support secure connect at + minimum. User needs to authorize each device. + dponly Automatically tunnel Display port (and USB). No + PCIe tunnels are created. + usbonly Automatically tunnel USB controller of the connected Thunderbolt dock (and Display Port). All PCIe links downstream of the dock are removed. + ======= ================================================== What: /sys/bus/thunderbolt/devices/.../authorized Date: Sep 2017 @@ -61,17 +63,23 @@ Description: This attribute is used to authorize Thunderbolt devices yet authorized. Possible values are supported: - 1: The device will be authorized and connected + + == =========================================== + 1 The device will be authorized and connected + == =========================================== When key attribute contains 32 byte hex string the possible values are: - 1: The 32 byte hex string is added to the device NVM and - the device is authorized. - 2: Send a challenge based on the 32 byte hex string. If the - challenge response from device is valid, the device is - authorized. In case of failure errno will be ENOKEY if - the device did not contain a key at all, and - EKEYREJECTED if the challenge response did not match. + + == ======================================================== + 1 The 32 byte hex string is added to the device NVM and + the device is authorized. + 2 Send a challenge based on the 32 byte hex string. If the + challenge response from device is valid, the device is + authorized. In case of failure errno will be ENOKEY if + the device did not contain a key at all, and + EKEYREJECTED if the challenge response did not match. + == ======================================================== What: /sys/bus/thunderbolt/devices/.../boot Date: Jun 2018 diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index 614d216dff1d..e449b8374f6a 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -72,24 +72,27 @@ Description: table at compile time. The format for the device ID is: idVendor idProduct bInterfaceClass RefIdVendor RefIdProduct The vendor ID and device ID fields are required, the - rest is optional. The Ref* tuple can be used to tell the + rest is optional. The `Ref*` tuple can be used to tell the driver to use the same driver_data for the new device as it is used for the reference device. Upon successfully adding an ID, the driver will probe - for the device and attempt to bind to it. For example: - # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id + for the device and attempt to bind to it. For example:: + + # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id Here add a new device (0458:7045) using driver_data from - an already supported device (0458:704c): - # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id + an already supported device (0458:704c):: + + # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id Reading from this file will list all dynamically added device IDs in the same format, with one entry per - line. For example: - # cat /sys/bus/usb/drivers/foo/new_id - 8086 10f5 - dead beef 06 - f00d cafe + line. For example:: + + # cat /sys/bus/usb/drivers/foo/new_id + 8086 10f5 + dead beef 06 + f00d cafe The list will be truncated at PAGE_SIZE bytes due to sysfs restrictions. @@ -209,6 +212,7 @@ Description: advance, and behaves well according to the specification. This attribute is a bit-field that controls the behavior of a specific port: + - Bit 0 of this field selects the "old" enumeration scheme, as it is considerably faster (it only causes one USB reset instead of 2). @@ -233,10 +237,10 @@ Description: poll() for monitoring changes to this value in user space. Any time this value changes the corresponding hub device will send a - udev event with the following attributes: + udev event with the following attributes:: - OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX - OVER_CURRENT_COUNT=[current value of this sysfs attribute] + OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX + OVER_CURRENT_COUNT=[current value of this sysfs attribute] What: /sys/bus/usb/devices/.../(hub interface)/portX/usb3_lpm_permit Date: November 2015 diff --git a/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg index 9ade80f81f96..2f86e4223bfc 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg +++ b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg @@ -12,8 +12,11 @@ KernelVersion: 2.6.26 Contact: Harrison Metzger <harrisonmetz@gmail.com> Description: Controls the devices display mode. For a 6 character display the values are + MSB 0x06; LSB 0x3F, and + for an 8 character display the values are + MSB 0x08; LSB 0xFF. What: /sys/bus/usb/.../textmode @@ -37,7 +40,7 @@ KernelVersion: 2.6.26 Contact: Harrison Metzger <harrisonmetz@gmail.com> Description: Controls the decimal places on the device. To set the nth decimal place, give this field - the value of 10 ** n. Assume this field has + the value of ``10 ** n``. Assume this field has the value k and has 1 or more decimal places set, to set the mth place (where m is not already set), - change this fields value to k + 10 ** m. + change this fields value to ``k + 10 ** m``. diff --git a/Documentation/ABI/testing/sysfs-bus-vfio-mdev b/Documentation/ABI/testing/sysfs-bus-vfio-mdev index 452dbe39270e..59fc804265db 100644 --- a/Documentation/ABI/testing/sysfs-bus-vfio-mdev +++ b/Documentation/ABI/testing/sysfs-bus-vfio-mdev @@ -28,8 +28,9 @@ Description: Writing UUID to this file will create mediated device of type <type-id> for parent device <device>. This is a write-only file. - For example: - # echo "83b8f4f2-509f-382f-3c1e-e6bfe0fa1001" > \ + For example:: + + # echo "83b8f4f2-509f-382f-3c1e-e6bfe0fa1001" > \ /sys/devices/foo/mdev_supported_types/foo-1/create What: /sys/.../mdev_supported_types/<type-id>/devices/ @@ -107,5 +108,6 @@ Description: Writing '1' to this file destroys the mediated device. The vendor driver can fail the remove() callback if that device is active and the vendor driver doesn't support hot unplug. - Example: - # echo 1 > /sys/bus/mdev/devices/<UUID>/remove + Example:: + + # echo 1 > /sys/bus/mdev/devices/<UUID>/remove diff --git a/Documentation/ABI/testing/sysfs-class-cxl b/Documentation/ABI/testing/sysfs-class-cxl index 7970e3713e70..a6f51a104c44 100644 --- a/Documentation/ABI/testing/sysfs-class-cxl +++ b/Documentation/ABI/testing/sysfs-class-cxl @@ -72,11 +72,16 @@ Description: read/write when performing the START_WORK ioctl. Only applicable when running under hashed page table mmu. Possible values: - none: No prefaulting (default) - work_element_descriptor: Treat the work element - descriptor as an effective address and - prefault what it points to. - all: all segments process calling START_WORK maps. + + ======================= ====================================== + none No prefaulting (default) + work_element_descriptor Treat the work element + descriptor as an effective address and + prefault what it points to. + all all segments process calling + START_WORK maps. + ======================= ====================================== + Users: https://github.com/ibm-capi/libcxl What: /sys/class/cxl/<afu>/reset diff --git a/Documentation/ABI/testing/sysfs-class-led b/Documentation/ABI/testing/sysfs-class-led index 5f67f7ab277b..65e040978f73 100644 --- a/Documentation/ABI/testing/sysfs-class-led +++ b/Documentation/ABI/testing/sysfs-class-led @@ -50,7 +50,7 @@ Description: You can change triggers in a similar manner to the way an IO scheduler is chosen. Trigger specific parameters can appear in /sys/class/leds/<led> once a given trigger is selected. For - their documentation see sysfs-class-led-trigger-*. + their documentation see `sysfs-class-led-trigger-*`. What: /sys/class/leds/<led>/inverted Date: January 2011 diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 b/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 index f520ece9b64c..69befe947d7e 100644 --- a/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 +++ b/Documentation/ABI/testing/sysfs-class-led-driver-el15203000 @@ -6,127 +6,132 @@ Description: The LEDs board supports only predefined patterns by firmware for specific LEDs. - Breathing mode for Screen frame light tube: - "0 4000 1 4000" - - ^ - | - Max-| --- - | / \ - | / \ - | / \ / - | / \ / - Min-|- --- - | - 0------4------8--> time (sec) - - Cascade mode for Pipe LED: - "1 800 2 800 4 800 8 800 16 800" - - ^ - | - 0 On -|----+ +----+ +--- - | | | | | - Off-| +-------------------+ +-------------------+ - | - 1 On -| +----+ +----+ - | | | | | - Off |----+ +-------------------+ +------------------ - | - 2 On -| +----+ +----+ - | | | | | - Off-|---------+ +-------------------+ +------------- - | - 3 On -| +----+ +----+ - | | | | | - Off-|--------------+ +-------------------+ +-------- - | - 4 On -| +----+ +----+ - | | | | | - Off-|-------------------+ +-------------------+ +--- - | - 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) - - Inverted cascade mode for Pipe LED: - "30 800 29 800 27 800 23 800 15 800" - - ^ - | - 0 On -| +-------------------+ +-------------------+ - | | | | | - Off-|----+ +----+ +--- - | - 1 On -|----+ +-------------------+ +------------------ - | | | | | - Off | +----+ +----+ - | - 2 On -|---------+ +-------------------+ +------------- - | | | | | - Off-| +----+ +----+ - | - 3 On -|--------------+ +-------------------+ +-------- - | | | | | - Off-| +----+ +----+ - | - 4 On -|-------------------+ +-------------------+ +--- - | | | | | - Off-| +----+ +----+ - | - 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) - - Bounce mode for Pipe LED: - "1 800 2 800 4 800 8 800 16 800 16 800 8 800 4 800 2 800 1 800" - - ^ - | - 0 On -|----+ +-------- - | | | - Off-| +---------------------------------------+ - | - 1 On -| +----+ +----+ - | | | | | - Off |----+ +-----------------------------+ +-------- - | - 2 On -| +----+ +----+ - | | | | | - Off-|---------+ +-------------------+ +------------- - | - 3 On -| +----+ +----+ - | | | | | - Off-|--------------+ +---------+ +------------------ - | - 4 On -| +---------+ - | | | - Off-|-------------------+ +----------------------- - | - 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) - - Inverted bounce mode for Pipe LED: - "30 800 29 800 27 800 23 800 15 800 15 800 23 800 27 800 29 800 30 800" - - ^ - | - 0 On -| +---------------------------------------+ - | | | - Off-|----+ +-------- - | - 1 On -|----+ +-----------------------------+ +-------- - | | | | | - Off | +----+ +----+ - | - 2 On -|---------+ +-------------------+ +------------- - | | | | | - Off-| +----+ +----+ - | - 3 On -|--------------+ +---------+ +------------------ - | | | | | - Off-| +----+ +----+ - | - 4 On -|-------------------+ +----------------------- - | | | - Off-| +---------+ - | - 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) + Breathing mode for Screen frame light tube:: + + "0 4000 1 4000" + + ^ + | + Max-| --- + | / \ + | / \ + | / \ / + | / \ / + Min-|- --- + | + 0------4------8--> time (sec) + + Cascade mode for Pipe LED:: + + "1 800 2 800 4 800 8 800 16 800" + + ^ + | + 0 On -|----+ +----+ +--- + | | | | | + Off-| +-------------------+ +-------------------+ + | + 1 On -| +----+ +----+ + | | | | | + Off |----+ +-------------------+ +------------------ + | + 2 On -| +----+ +----+ + | | | | | + Off-|---------+ +-------------------+ +------------- + | + 3 On -| +----+ +----+ + | | | | | + Off-|--------------+ +-------------------+ +-------- + | + 4 On -| +----+ +----+ + | | | | | + Off-|-------------------+ +-------------------+ +--- + | + 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) + + Inverted cascade mode for Pipe LED:: + + "30 800 29 800 27 800 23 800 15 800" + + ^ + | + 0 On -| +-------------------+ +-------------------+ + | | | | | + Off-|----+ +----+ +--- + | + 1 On -|----+ +-------------------+ +------------------ + | | | | | + Off | +----+ +----+ + | + 2 On -|---------+ +-------------------+ +------------- + | | | | | + Off-| +----+ +----+ + | + 3 On -|--------------+ +-------------------+ +-------- + | | | | | + Off-| +----+ +----+ + | + 4 On -|-------------------+ +-------------------+ +--- + | | | | | + Off-| +----+ +----+ + | + 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) + + Bounce mode for Pipe LED:: + + "1 800 2 800 4 800 8 800 16 800 16 800 8 800 4 800 2 800 1 800" + + ^ + | + 0 On -|----+ +-------- + | | | + Off-| +---------------------------------------+ + | + 1 On -| +----+ +----+ + | | | | | + Off |----+ +-----------------------------+ +-------- + | + 2 On -| +----+ +----+ + | | | | | + Off-|---------+ +-------------------+ +------------- + | + 3 On -| +----+ +----+ + | | | | | + Off-|--------------+ +---------+ +------------------ + | + 4 On -| +---------+ + | | | + Off-|-------------------+ +----------------------- + | + 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) + + Inverted bounce mode for Pipe LED:: + + "30 800 29 800 27 800 23 800 15 800 15 800 23 800 27 800 29 800 30 800" + + ^ + | + 0 On -| +---------------------------------------+ + | | | + Off-|----+ +-------- + | + 1 On -|----+ +-----------------------------+ +-------- + | | | | | + Off | +----+ +----+ + | + 2 On -|---------+ +-------------------+ +------------- + | | | | | + Off-| +----+ +----+ + | + 3 On -|--------------+ +---------+ +------------------ + | | | | | + Off-| +----+ +----+ + | + 4 On -|-------------------+ +----------------------- + | | | + Off-| +---------+ + | + 0---0.8--1.6--2.4--3.2---4---4.8--5.6--6.4--7.2---8--> time (sec) What: /sys/class/leds/<led>/repeat Date: September 2019 diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx b/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx index 45b1e605d355..215482379580 100644 --- a/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx +++ b/Documentation/ABI/testing/sysfs-class-led-driver-sc27xx @@ -12,8 +12,8 @@ Description: format, we should set brightness as 0 for rise stage, fall stage and low stage. - Min stage duration: 125 ms - Max stage duration: 31875 ms + - Min stage duration: 125 ms + - Max stage duration: 31875 ms Since the stage duration step is 125 ms, the duration should be a multiplier of 125, like 125ms, 250ms, 375ms, 500ms ... 31875ms. diff --git a/Documentation/ABI/testing/sysfs-class-mic b/Documentation/ABI/testing/sysfs-class-mic index 6ef682603179..bd0e780c3760 100644 --- a/Documentation/ABI/testing/sysfs-class-mic +++ b/Documentation/ABI/testing/sysfs-class-mic @@ -41,24 +41,33 @@ Description: When read, this entry provides the current state of an Intel MIC device in the context of the card OS. Possible values that will be read are: - "ready" - The MIC device is ready to boot the card OS. On - reading this entry after an OSPM resume, a "boot" has to be - written to this entry if the card was previously shutdown - during OSPM suspend. - "booting" - The MIC device has initiated booting a card OS. - "online" - The MIC device has completed boot and is online - "shutting_down" - The card OS is shutting down. - "resetting" - A reset has been initiated for the MIC device - "reset_failed" - The MIC device has failed to reset. + + + =============== =============================================== + "ready" The MIC device is ready to boot the card OS. + On reading this entry after an OSPM resume, + a "boot" has to be written to this entry if + the card was previously shutdown during OSPM + suspend. + "booting" The MIC device has initiated booting a card OS. + "online" The MIC device has completed boot and is online + "shutting_down" The card OS is shutting down. + "resetting" A reset has been initiated for the MIC device + "reset_failed" The MIC device has failed to reset. + =============== =============================================== When written, this sysfs entry triggers different state change operations depending upon the current state of the card OS. Acceptable values are: - "boot" - Boot the card OS image specified by the combination - of firmware, ramdisk, cmdline and bootmode - sysfs entries. - "reset" - Initiates device reset. - "shutdown" - Initiates card OS shutdown. + + + ========== =================================================== + "boot" Boot the card OS image specified by the combination + of firmware, ramdisk, cmdline and bootmode + sysfs entries. + "reset" Initiates device reset. + "shutdown" Initiates card OS shutdown. + ========== =================================================== What: /sys/class/mic/mic(x)/shutdown_status Date: October 2013 @@ -69,12 +78,15 @@ Description: OS can shutdown because of various reasons. When read, this entry provides the status on why the card OS was shutdown. Possible values are: - "nop" - shutdown status is not applicable, when the card OS is - "online" - "crashed" - Shutdown because of a HW or SW crash. - "halted" - Shutdown because of a halt command. - "poweroff" - Shutdown because of a poweroff command. - "restart" - Shutdown because of a restart command. + + ========== =================================================== + "nop" shutdown status is not applicable, when the card OS + is "online" + "crashed" Shutdown because of a HW or SW crash. + "halted" Shutdown because of a halt command. + "poweroff" Shutdown because of a poweroff command. + "restart" Shutdown because of a restart command. + ========== =================================================== What: /sys/class/mic/mic(x)/cmdline Date: October 2013 diff --git a/Documentation/ABI/testing/sysfs-class-ocxl b/Documentation/ABI/testing/sysfs-class-ocxl index ae1276efa45a..bf33f4fda58f 100644 --- a/Documentation/ABI/testing/sysfs-class-ocxl +++ b/Documentation/ABI/testing/sysfs-class-ocxl @@ -11,8 +11,11 @@ Contact: linuxppc-dev@lists.ozlabs.org Description: read only Number of contexts for the AFU, in the format <n>/<max> where: + + ==== =============================================== n: number of currently active contexts, for debug max: maximum number of contexts supported by the AFU + ==== =============================================== What: /sys/class/ocxl/<afu name>/pp_mmio_size Date: January 2018 diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power index dbccb2fcd7ce..d4319a04c302 100644 --- a/Documentation/ABI/testing/sysfs-class-power +++ b/Documentation/ABI/testing/sysfs-class-power @@ -1,4 +1,4 @@ -===== General Properties ===== +**General Properties** What: /sys/class/power_supply/<supply_name>/manufacturer Date: May 2007 @@ -72,6 +72,7 @@ Description: critically low). Access: Read, Write + Valid values: 0 - 100 (percent) What: /sys/class/power_supply/<supply_name>/capacity_error_margin @@ -96,7 +97,9 @@ Description: Coarse representation of battery capacity. Access: Read - Valid values: "Unknown", "Critical", "Low", "Normal", "High", + + Valid values: + "Unknown", "Critical", "Low", "Normal", "High", "Full" What: /sys/class/power_supply/<supply_name>/current_avg @@ -139,6 +142,7 @@ Description: throttling for thermal cooling or improving battery health. Access: Read, Write + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/charge_control_limit_max @@ -148,6 +152,7 @@ Description: Maximum legal value for the charge_control_limit property. Access: Read + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/charge_control_start_threshold @@ -168,6 +173,7 @@ Description: stop. Access: Read, Write + Valid values: 0 - 100 (percent) What: /sys/class/power_supply/<supply_name>/charge_type @@ -183,7 +189,9 @@ Description: different algorithm. Access: Read, Write - Valid values: "Unknown", "N/A", "Trickle", "Fast", "Standard", + + Valid values: + "Unknown", "N/A", "Trickle", "Fast", "Standard", "Adaptive", "Custom" What: /sys/class/power_supply/<supply_name>/charge_term_current @@ -194,6 +202,7 @@ Description: when the battery is considered full and charging should end. Access: Read + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/health @@ -204,7 +213,9 @@ Description: functionality. Access: Read - Valid values: "Unknown", "Good", "Overheat", "Dead", + + Valid values: + "Unknown", "Good", "Overheat", "Dead", "Over voltage", "Unspecified failure", "Cold", "Watchdog timer expire", "Safety timer expire", "Over current", "Calibration required", "Warm", @@ -218,6 +229,7 @@ Description: for a battery charge cycle. Access: Read + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/present @@ -227,9 +239,13 @@ Description: Reports whether a battery is present or not in the system. Access: Read + Valid values: + + == ======= 0: Absent 1: Present + == ======= What: /sys/class/power_supply/<supply_name>/status Date: May 2007 @@ -240,7 +256,9 @@ Description: used to enable/disable charging to the battery. Access: Read, Write - Valid values: "Unknown", "Charging", "Discharging", + + Valid values: + "Unknown", "Charging", "Discharging", "Not charging", "Full" What: /sys/class/power_supply/<supply_name>/technology @@ -250,7 +268,9 @@ Description: Describes the battery technology supported by the supply. Access: Read - Valid values: "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", + + Valid values: + "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd", "LiMn" What: /sys/class/power_supply/<supply_name>/temp @@ -260,6 +280,7 @@ Description: Reports the current TBAT battery temperature reading. Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_alert_max @@ -274,6 +295,7 @@ Description: critically high, and charging has stopped). Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_alert_min @@ -289,6 +311,7 @@ Description: remedy the situation). Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_max @@ -299,6 +322,7 @@ Description: charging. Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_min @@ -309,6 +333,7 @@ Description: charging. Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/voltage_avg, @@ -320,6 +345,7 @@ Description: which they average readings to smooth out the reported value. Access: Read + Valid values: Represented in microvolts What: /sys/class/power_supply/<supply_name>/voltage_max, @@ -330,6 +356,7 @@ Description: during charging. Access: Read + Valid values: Represented in microvolts What: /sys/class/power_supply/<supply_name>/voltage_min, @@ -340,6 +367,7 @@ Description: during discharging. Access: Read + Valid values: Represented in microvolts What: /sys/class/power_supply/<supply_name>/voltage_now, @@ -350,9 +378,10 @@ Description: This value is not averaged/smoothed. Access: Read + Valid values: Represented in microvolts -===== USB Properties ===== +**USB Properties** What: /sys/class/power_supply/<supply_name>/current_avg Date: May 2007 @@ -363,6 +392,7 @@ Description: average readings to smooth out the reported value. Access: Read + Valid values: Represented in microamps @@ -373,6 +403,7 @@ Description: Reports the maximum IBUS current the supply can support. Access: Read + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/current_now @@ -385,6 +416,7 @@ Description: within the reported min/max range. Access: Read, Write + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/input_current_limit @@ -399,6 +431,7 @@ Description: solved using power limit use input_current_limit. Access: Read, Write + Valid values: Represented in microamps What: /sys/class/power_supply/<supply_name>/input_voltage_limit @@ -441,10 +474,14 @@ Description: USB supply so voltage and current can be controlled). Access: Read, Write + Valid values: + + == ================================================== 0: Offline 1: Online Fixed - Fixed Voltage Supply 2: Online Programmable - Programmable Voltage Supply + == ================================================== What: /sys/class/power_supply/<supply_name>/temp Date: May 2007 @@ -455,6 +492,7 @@ Description: TJUNC temperature of an IC) Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_alert_max @@ -470,6 +508,7 @@ Description: remedy the situation). Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_alert_min @@ -485,6 +524,7 @@ Description: accordingly to remedy the situation). Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_max @@ -494,6 +534,7 @@ Description: Reports the maximum allowed supply temperature for operation. Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/temp_min @@ -503,6 +544,7 @@ Description: Reports the mainimum allowed supply temperature for operation. Access: Read + Valid values: Represented in 1/10 Degrees Celsius What: /sys/class/power_supply/<supply_name>/usb_type @@ -514,7 +556,9 @@ Description: is attached. Access: Read-Only - Valid values: "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD", + + Valid values: + "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD", "PD_DRP", "PD_PPS", "BrickID" What: /sys/class/power_supply/<supply_name>/voltage_max @@ -524,6 +568,7 @@ Description: Reports the maximum VBUS voltage the supply can support. Access: Read + Valid values: Represented in microvolts What: /sys/class/power_supply/<supply_name>/voltage_min @@ -533,6 +578,7 @@ Description: Reports the minimum VBUS voltage the supply can support. Access: Read + Valid values: Represented in microvolts What: /sys/class/power_supply/<supply_name>/voltage_now @@ -545,9 +591,10 @@ Description: within the reported min/max range. Access: Read, Write + Valid values: Represented in microvolts -===== Device Specific Properties ===== +**Device Specific Properties** What: /sys/class/power/ds2760-battery.*/charge_now Date: May 2010 @@ -581,6 +628,7 @@ Description: will drop to 0 A) and will trigger interrupt. Valid values: + - 5, 6 or 7 (hours), - 0: disabled. @@ -595,6 +643,7 @@ Description: will drop to 0 A) and will trigger interrupt. Valid values: + - 4 - 16 (hours), step by 2 (rounded down) - 0: disabled. @@ -609,6 +658,7 @@ Description: interrupt and start top-off charging mode. Valid values: + - 100000 - 200000 (microamps), step by 25000 (rounded down) - 200000 - 350000 (microamps), step by 50000 (rounded down) - 0: disabled. @@ -624,6 +674,7 @@ Description: will drop to 0 A) and will trigger interrupt. Valid values: + - 0 - 70 (minutes), step by 10 (rounded down) What: /sys/class/power_supply/bq24257-charger/ovp_voltage @@ -637,6 +688,7 @@ Description: device datasheet for details. Valid values: + - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000, 10500000 (all uV) @@ -652,6 +704,7 @@ Description: lower than the set value. See device datasheet for details. Valid values: + - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000, 4760000 (all uV) @@ -666,6 +719,7 @@ Description: the charger operates normally. See device datasheet for details. Valid values: + - 1: enabled - 0: disabled @@ -681,6 +735,7 @@ Description: from the system. See device datasheet for details. Valid values: + - 1: enabled - 0: disabled diff --git a/Documentation/ABI/testing/sysfs-class-power-twl4030 b/Documentation/ABI/testing/sysfs-class-power-twl4030 index b4fd32d210c5..7ac36dba87bc 100644 --- a/Documentation/ABI/testing/sysfs-class-power-twl4030 +++ b/Documentation/ABI/testing/sysfs-class-power-twl4030 @@ -4,18 +4,20 @@ Description: Writing to this can disable charging. Possible values are: - "auto" - draw power as appropriate for detected - power source and battery status. - "off" - do not draw any power. - "continuous" - - activate mode described as "linear" in - TWL data sheets. This uses whatever - current is available and doesn't switch off - when voltage drops. - This is useful for unstable power sources - such as bicycle dynamo, but care should - be taken that battery is not over-charged. + ============= =========================================== + "auto" draw power as appropriate for detected + power source and battery status. + "off" do not draw any power. + "continuous" activate mode described as "linear" in + TWL data sheets. This uses whatever + current is available and doesn't switch off + when voltage drops. + + This is useful for unstable power sources + such as bicycle dynamo, but care should + be taken that battery is not over-charged. + ============= =========================================== What: /sys/class/power_supply/twl4030_ac/mode Description: @@ -23,6 +25,9 @@ Description: Writing to this can disable charging. Possible values are: - "auto" - draw power as appropriate for detected - power source and battery status. - "off" - do not draw any power. + + ====== =========================================== + "auto" draw power as appropriate for detected + power source and battery status. + "off" do not draw any power. + ====== =========================================== diff --git a/Documentation/ABI/testing/sysfs-class-rc b/Documentation/ABI/testing/sysfs-class-rc index 6c0d6c8cb911..9c8ff7910858 100644 --- a/Documentation/ABI/testing/sysfs-class-rc +++ b/Documentation/ABI/testing/sysfs-class-rc @@ -21,15 +21,22 @@ KernelVersion: 2.6.36 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Description: Reading this file returns a list of available protocols, - something like: + something like:: + "rc5 [rc6] nec jvc [sony]" + Enabled protocols are shown in [] brackets. + Writing "+proto" will add a protocol to the list of enabled protocols. + Writing "-proto" will remove a protocol from the list of enabled protocols. + Writing "proto" will enable only "proto". + Writing "none" will disable all protocols. + Write fails with EINVAL if an invalid protocol combination or unknown protocol name is used. @@ -39,11 +46,13 @@ KernelVersion: 3.15 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Description: Sets the scancode filter expected value. + Use in combination with /sys/class/rc/rcN/filter_mask to set the expected value of the bits set in the filter mask. If the hardware supports it then scancodes which do not match the filter will be ignored. Otherwise the write will fail with an error. + This value may be reset to 0 if the current protocol is altered. What: /sys/class/rc/rcN/filter_mask @@ -56,9 +65,11 @@ Description: of the scancode which should be compared against the expected value. A value of 0 disables the filter to allow all valid scancodes to be processed. + If the hardware supports it then scancodes which do not match the filter will be ignored. Otherwise the write will fail with an error. + This value may be reset to 0 if the current protocol is altered. What: /sys/class/rc/rcN/wakeup_protocols @@ -67,15 +78,22 @@ KernelVersion: 4.11 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Description: Reading this file returns a list of available protocols to use - for the wakeup filter, something like: + for the wakeup filter, something like:: + "rc-5 nec nec-x rc-6-0 rc-6-6a-24 [rc-6-6a-32] rc-6-mce" + Note that protocol variants are listed, so "nec", "sony", "rc-5", "rc-6" have their different bit length encodings listed if available. + The enabled wakeup protocol is shown in [] brackets. + Only one protocol can be selected at a time. + Writing "proto" will use "proto" for wakeup events. + Writing "none" will disable wakeup. + Write fails with EINVAL if an invalid protocol combination or unknown protocol name is used, or if wakeup is not supported by the hardware. @@ -86,13 +104,17 @@ KernelVersion: 3.15 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Description: Sets the scancode wakeup filter expected value. + Use in combination with /sys/class/rc/rcN/wakeup_filter_mask to set the expected value of the bits set in the wakeup filter mask to trigger a system wake event. + If the hardware supports it and wakeup_filter_mask is not 0 then scancodes which match the filter will wake the system from e.g. suspend to RAM or power off. + Otherwise the write will fail with an error. + This value may be reset to 0 if the wakeup protocol is altered. What: /sys/class/rc/rcN/wakeup_filter_mask @@ -101,11 +123,15 @@ KernelVersion: 3.15 Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Description: Sets the scancode wakeup filter mask of bits to compare. + Use in combination with /sys/class/rc/rcN/wakeup_filter to set the bits of the scancode which should be compared against the expected value to trigger a system wake event. + If the hardware supports it and wakeup_filter_mask is not 0 then scancodes which match the filter will wake the system from e.g. suspend to RAM or power off. + Otherwise the write will fail with an error. + This value may be reset to 0 if the wakeup protocol is altered. diff --git a/Documentation/ABI/testing/sysfs-class-scsi_host b/Documentation/ABI/testing/sysfs-class-scsi_host index bafc59fd7b69..7c98d8f43c45 100644 --- a/Documentation/ABI/testing/sysfs-class-scsi_host +++ b/Documentation/ABI/testing/sysfs-class-scsi_host @@ -56,8 +56,9 @@ Description: management) on top, which makes it match the Windows IRST (Intel Rapid Storage Technology) driver settings. This setting is also close to min_power, except that: + a) It does not use host-initiated slumber mode, but it does - allow device-initiated slumber + allow device-initiated slumber b) It does not enable low power device sleep mode (DevSlp). What: /sys/class/scsi_host/hostX/em_message @@ -70,8 +71,8 @@ Description: protocol, writes and reads correspond to the LED message format as defined in the AHCI spec. - The user must turn sw_activity (under /sys/block/*/device/) OFF - it they wish to control the activity LED via the em_message + The user must turn sw_activity (under `/sys/block/*/device/`) + OFF it they wish to control the activity LED via the em_message file. em_message_type: (RO) Displays the current enclosure management diff --git a/Documentation/ABI/testing/sysfs-class-typec b/Documentation/ABI/testing/sysfs-class-typec index b834671522d6..b7794e02ad20 100644 --- a/Documentation/ABI/testing/sysfs-class-typec +++ b/Documentation/ABI/testing/sysfs-class-typec @@ -40,10 +40,13 @@ Description: attribute will not return until the operation has finished. Valid values: - - source (The port will behave as source only DFP port) - - sink (The port will behave as sink only UFP port) - - dual (The port will behave as dual-role-data and + + ====== ============================================== + source (The port will behave as source only DFP port) + sink (The port will behave as sink only UFP port) + dual (The port will behave as dual-role-data and dual-role-power port) + ====== ============================================== What: /sys/class/typec/<port>/vconn_source Date: April 2017 @@ -59,6 +62,7 @@ Description: generates uevent KOBJ_CHANGE. Valid values: + - "no" when the port is not the VCONN Source - "yes" when the port is the VCONN Source @@ -72,6 +76,7 @@ Description: power operation mode should show "usb_power_delivery". Valid values: + - default - 1.5A - 3.0A @@ -191,6 +196,7 @@ Date: April 2017 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com> Description: Shows type of the plug on the cable: + - type-a - Standard A - type-b - Standard B - type-c diff --git a/Documentation/ABI/testing/sysfs-devices-platform-ACPI-TAD b/Documentation/ABI/testing/sysfs-devices-platform-ACPI-TAD index 7e43cdce9a52..f7b360a61b21 100644 --- a/Documentation/ABI/testing/sysfs-devices-platform-ACPI-TAD +++ b/Documentation/ABI/testing/sysfs-devices-platform-ACPI-TAD @@ -7,6 +7,7 @@ Description: (RO) Hexadecimal bitmask of the TAD attributes are reported by the platform firmware (see ACPI 6.2, section 9.18.2): + ======= ====================================================== BIT(0): AC wakeup implemented if set BIT(1): DC wakeup implemented if set BIT(2): Get/set real time features implemented if set @@ -16,6 +17,7 @@ Description: BIT(6): The AC timer wakes up from S5 if set BIT(7): The DC timer wakes up from S4 if set BIT(8): The DC timer wakes up from S5 if set + ======= ====================================================== The other bits are reserved. @@ -62,9 +64,11 @@ Description: timer status with the following meaning of bits (see ACPI 6.2, Section 9.18.5): + ======= ====================================================== Bit(0): The timer has expired if set. Bit(1): The timer has woken up the system from a sleep state (S3 or S4/S5 if supported) if set. + ======= ====================================================== The other bits are reserved. diff --git a/Documentation/ABI/testing/sysfs-devices-platform-docg3 b/Documentation/ABI/testing/sysfs-devices-platform-docg3 index 8aa36716882f..378c42694bfb 100644 --- a/Documentation/ABI/testing/sysfs-devices-platform-docg3 +++ b/Documentation/ABI/testing/sysfs-devices-platform-docg3 @@ -9,8 +9,10 @@ Description: The protection has information embedded whether it blocks reads, writes or both. The result is: - 0 -> the DPS is not keylocked - 1 -> the DPS is keylocked + + - 0 -> the DPS is not keylocked + - 1 -> the DPS is keylocked + Users: None identified so far. What: /sys/devices/platform/docg3/f[0-3]_dps[01]_protection_key @@ -27,8 +29,12 @@ Description: Entering the correct value toggle the lock, and can be observed through f[0-3]_dps[01]_is_keylocked. Possible values are: + - 8 bytes + Typical values are: + - "00000000" - "12345678" + Users: None identified so far. diff --git a/Documentation/ABI/testing/sysfs-devices-platform-sh_mobile_lcdc_fb b/Documentation/ABI/testing/sysfs-devices-platform-sh_mobile_lcdc_fb index 2107082426da..e45ac2e865d5 100644 --- a/Documentation/ABI/testing/sysfs-devices-platform-sh_mobile_lcdc_fb +++ b/Documentation/ABI/testing/sysfs-devices-platform-sh_mobile_lcdc_fb @@ -17,10 +17,10 @@ Description: to overlay planes. Selects the composition mode for the overlay. Possible values - are + are: - 0 - Alpha Blending - 1 - ROP3 + - 0 - Alpha Blending + - 1 - ROP3 What: /sys/devices/platform/sh_mobile_lcdc_fb.[0-3]/graphics/fb[0-9]/ovl_position Date: May 2012 @@ -30,7 +30,7 @@ Description: to overlay planes. Stores the x,y overlay position on the display in pixels. The - position format is `[0-9]+,[0-9]+'. + position format is `[0-9]+,[0-9]+`. What: /sys/devices/platform/sh_mobile_lcdc_fb.[0-3]/graphics/fb[0-9]/ovl_rop3 Date: May 2012 diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index b555df825447..274c337ec6a9 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -151,23 +151,28 @@ Description: The processor idle states which are available for use have the following attributes: - name: (RO) Name of the idle state (string). + ======== ==== ================================================= + name: (RO) Name of the idle state (string). latency: (RO) The latency to exit out of this idle state (in - microseconds). + microseconds). - power: (RO) The power consumed while in this idle state (in - milliwatts). + power: (RO) The power consumed while in this idle state (in + milliwatts). - time: (RO) The total time spent in this idle state (in microseconds). + time: (RO) The total time spent in this idle state + (in microseconds). - usage: (RO) Number of times this state was entered (a count). + usage: (RO) Number of times this state was entered (a count). - above: (RO) Number of times this state was entered, but the - observed CPU idle duration was too short for it (a count). + above: (RO) Number of times this state was entered, but the + observed CPU idle duration was too short for it + (a count). - below: (RO) Number of times this state was entered, but the - observed CPU idle duration was too long for it (a count). + below: (RO) Number of times this state was entered, but the + observed CPU idle duration was too long for it + (a count). + ======== ==== ================================================= What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/desc Date: February 2008 @@ -290,6 +295,7 @@ Description: Processor frequency boosting control This switch controls the boost setting for the whole system. Boosting allows the CPU and the firmware to run at a frequency beyound it's nominal limit. + More details can be found in Documentation/admin-guide/pm/cpufreq.rst @@ -337,43 +343,57 @@ Contact: Sudeep Holla <sudeep.holla@arm.com> Description: Parameters for the CPU cache attributes allocation_policy: - - WriteAllocate: allocate a memory location to a cache line - on a cache miss because of a write - - ReadAllocate: allocate a memory location to a cache line + - WriteAllocate: + allocate a memory location to a cache line + on a cache miss because of a write + - ReadAllocate: + allocate a memory location to a cache line on a cache miss because of a read - - ReadWriteAllocate: both writeallocate and readallocate + - ReadWriteAllocate: + both writeallocate and readallocate - attributes: LEGACY used only on IA64 and is same as write_policy + attributes: + LEGACY used only on IA64 and is same as write_policy - coherency_line_size: the minimum amount of data in bytes that gets + coherency_line_size: + the minimum amount of data in bytes that gets transferred from memory to cache - level: the cache hierarchy in the multi-level cache configuration + level: + the cache hierarchy in the multi-level cache configuration - number_of_sets: total number of sets in the cache, a set is a + number_of_sets: + total number of sets in the cache, a set is a collection of cache lines with the same cache index - physical_line_partition: number of physical cache line per cache tag + physical_line_partition: + number of physical cache line per cache tag - shared_cpu_list: the list of logical cpus sharing the cache + shared_cpu_list: + the list of logical cpus sharing the cache - shared_cpu_map: logical cpu mask containing the list of cpus sharing + shared_cpu_map: + logical cpu mask containing the list of cpus sharing the cache - size: the total cache size in kB + size: + the total cache size in kB type: - Instruction: cache that only holds instructions - Data: cache that only caches data - Unified: cache that holds both data and instructions - ways_of_associativity: degree of freedom in placing a particular block - of memory in the cache + ways_of_associativity: + degree of freedom in placing a particular block + of memory in the cache write_policy: - - WriteThrough: data is written to both the cache line + - WriteThrough: + data is written to both the cache line and to the block in the lower-level memory - - WriteBack: data is written only to the cache line and + - WriteBack: + data is written only to the cache line and the modified cache line is written to main memory only when it is replaced @@ -414,30 +434,30 @@ Description: POWERNV CPUFreq driver's frequency throttle stats directory and throttle attributes exported in the 'throttle_stats' directory: - turbo_stat : This file gives the total number of times the max - frequency is throttled to lower frequency in turbo (at and above - nominal frequency) range of frequencies. + frequency is throttled to lower frequency in turbo (at and above + nominal frequency) range of frequencies. - sub_turbo_stat : This file gives the total number of times the - max frequency is throttled to lower frequency in sub-turbo(below - nominal frequency) range of frequencies. + max frequency is throttled to lower frequency in sub-turbo(below + nominal frequency) range of frequencies. - unthrottle : This file gives the total number of times the max - frequency is unthrottled after being throttled. + frequency is unthrottled after being throttled. - powercap : This file gives the total number of times the max - frequency is throttled due to 'Power Capping'. + frequency is throttled due to 'Power Capping'. - overtemp : This file gives the total number of times the max - frequency is throttled due to 'CPU Over Temperature'. + frequency is throttled due to 'CPU Over Temperature'. - supply_fault : This file gives the total number of times the - max frequency is throttled due to 'Power Supply Failure'. + max frequency is throttled due to 'Power Supply Failure'. - overcurrent : This file gives the total number of times the - max frequency is throttled due to 'Overcurrent'. + max frequency is throttled due to 'Overcurrent'. - occ_reset : This file gives the total number of times the max - frequency is throttled due to 'OCC Reset'. + frequency is throttled due to 'OCC Reset'. The sysfs attributes representing different throttle reasons like powercap, overtemp, supply_fault, overcurrent and occ_reset map to @@ -469,8 +489,9 @@ What: /sys/devices/system/cpu/cpuX/regs/ Date: June 2016 Contact: Linux ARM Kernel Mailing list <linux-arm-kernel@lists.infradead.org> Description: AArch64 CPU registers + 'identification' directory exposes the CPU ID registers for - identifying model and revision of the CPU. + identifying model and revision of the CPU. What: /sys/devices/system/cpu/cpu#/cpu_capacity Date: December 2016 @@ -497,9 +518,11 @@ Description: Information about CPU vulnerabilities vulnerabilities. The output of those files reflects the state of the CPUs in the system. Possible output values: + ================ ============================================== "Not affected" CPU is not affected by the vulnerability "Vulnerable" CPU is affected and no mitigation in effect "Mitigation: $M" CPU is affected and mitigation $M is in effect + ================ ============================================== See also: Documentation/admin-guide/hw-vuln/index.rst @@ -515,12 +538,14 @@ Description: Control Symetric Multi Threading (SMT) control: Read/write interface to control SMT. Possible values: + ================ ========================================= "on" SMT is enabled "off" SMT is disabled "forceoff" SMT is force disabled. Cannot be changed. "notsupported" SMT is not supported by the CPU "notimplemented" SMT runtime toggling is not implemented for the architecture + ================ ========================================= If control status is "forceoff" or "notsupported" writes are rejected. diff --git a/Documentation/ABI/testing/sysfs-devices-system-ibm-rtl b/Documentation/ABI/testing/sysfs-devices-system-ibm-rtl index 470def06ab0a..1a8ee26e92ae 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-ibm-rtl +++ b/Documentation/ABI/testing/sysfs-devices-system-ibm-rtl @@ -5,8 +5,10 @@ Contact: Vernon Mauery <vernux@us.ibm.com> Description: The state file allows a means by which to change in and out of Premium Real-Time Mode (PRTM), as well as the ability to query the current state. - 0 => PRTM off - 1 => PRTM enabled + + - 0 => PRTM off + - 1 => PRTM enabled + Users: The ibm-prtm userspace daemon uses this interface. diff --git a/Documentation/ABI/testing/sysfs-driver-bd9571mwv-regulator b/Documentation/ABI/testing/sysfs-driver-bd9571mwv-regulator index 4d63a7904b94..42214b4ff14a 100644 --- a/Documentation/ABI/testing/sysfs-driver-bd9571mwv-regulator +++ b/Documentation/ABI/testing/sysfs-driver-bd9571mwv-regulator @@ -6,11 +6,13 @@ Description: Read/write the current state of DDR Backup Mode, which controls if DDR power rails will be kept powered during system suspend. ("on"/"1" = enabled, "off"/"0" = disabled). Two types of power switches (or control signals) can be used: + A. With a momentary power switch (or pulse signal), DDR Backup Mode is enabled by default when available, as the PMIC will be configured only during system suspend. B. With a toggle power switch (or level signal), the following steps must be followed exactly: + 1. Configure PMIC for backup mode, to change the role of the accessory power switch from a power switch to a wake-up switch, @@ -20,8 +22,10 @@ Description: Read/write the current state of DDR Backup Mode, which controls 3. Suspend system, 4. Switch accessory power switch on, to resume the system. + DDR Backup Mode must be explicitly enabled by the user, to invoke step 1. + See also Documentation/devicetree/bindings/mfd/bd9571mwv.txt. Users: User space applications for embedded boards equipped with a BD9571MWV PMIC. diff --git a/Documentation/ABI/testing/sysfs-driver-genwqe b/Documentation/ABI/testing/sysfs-driver-genwqe index 64ac6d567c4b..69d855dc4c47 100644 --- a/Documentation/ABI/testing/sysfs-driver-genwqe +++ b/Documentation/ABI/testing/sysfs-driver-genwqe @@ -29,8 +29,12 @@ What: /sys/class/genwqe/genwqe<n>_card/reload_bitstream Date: May 2014 Contact: klebers@linux.vnet.ibm.com Description: Interface to trigger a PCIe card reset to reload the bitstream. + + :: + sudo sh -c 'echo 1 > \ /sys/class/genwqe/genwqe0_card/reload_bitstream' + If successfully, the card will come back with the bitstream set on 'next_bitstream'. @@ -64,8 +68,11 @@ Description: Base clock frequency of the card. What: /sys/class/genwqe/genwqe<n>_card/device/sriov_numvfs Date: Oct 2013 Contact: haver@linux.vnet.ibm.com -Description: Enable VFs (1..15): +Description: Enable VFs (1..15):: + sudo sh -c 'echo 15 > \ /sys/bus/pci/devices/0000\:1b\:00.0/sriov_numvfs' - Disable VFs: + + Disable VFs:: + Write a 0 into the same sysfs entry. diff --git a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff index 305dffd229a8..de07be314efc 100644 --- a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff +++ b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff @@ -12,7 +12,9 @@ KernelVersion: 4.1 Contact: Michal Malý <madcatxster@devoid-pointer.net> Description: Displays a set of alternate modes supported by a wheel. Each mode is listed as follows: + Tag: Mode Name + Currently active mode is marked with an asterisk. List also contains an abstract item "native" which always denotes the native mode of the wheel. Echoing the mode tag switches the @@ -24,24 +26,30 @@ Description: Displays a set of alternate modes supported by a wheel. Each This entry is not created for devices that have only one mode. Currently supported mode switches: - Driving Force Pro: + + Driving Force Pro:: + DF-EX --> DFP - G25: + G25:: + DF-EX --> DFP --> G25 - G27: + G27:: + DF-EX <*> DFP <-> G25 <-> G27 DF-EX <*--------> G25 <-> G27 DF-EX <*----------------> G27 - G29: + G29:: + DF-EX <*> DFP <-> G25 <-> G27 <-> G29 DF-EX <*--------> G25 <-> G27 <-> G29 DF-EX <*----------------> G27 <-> G29 DF-EX <*------------------------> G29 - DFGT: + DFGT:: + DF-EX <*> DFP <-> DFGT DF-EX <*--------> DFGT diff --git a/Documentation/ABI/testing/sysfs-driver-hid-wiimote b/Documentation/ABI/testing/sysfs-driver-hid-wiimote index 39dfa5cb1cc5..cd7b82a5c27d 100644 --- a/Documentation/ABI/testing/sysfs-driver-hid-wiimote +++ b/Documentation/ABI/testing/sysfs-driver-hid-wiimote @@ -39,9 +39,13 @@ Description: While a device is initialized by the wiimote driver, we perform Other strings for each device-type are available and may be added if new device-specific detections are added. Currently supported are: - gen10: First Wii Remote generation - gen20: Second Wii Remote Plus generation (builtin MP) + + ============= ======================================= + gen10: First Wii Remote generation + gen20: Second Wii Remote Plus generation + (builtin MP) balanceboard: Wii Balance Board + ============= ======================================= What: /sys/bus/hid/drivers/wiimote/<dev>/bboard_calib Date: May 2013 @@ -54,6 +58,7 @@ Description: This attribute is only provided if the device was detected as a First, 0kg values for all 4 sensors are written, followed by the 17kg values for all 4 sensors and last the 34kg values for all 4 sensors. + Calibration data is already applied by the kernel to all input values but may be used by user-space to perform other transformations. @@ -68,9 +73,11 @@ Description: This attribute is only provided if the device was detected as a is prefixed with a +/-. Each value is a signed 16bit number. Data is encoded as decimal numbers and specifies the offsets of the analog sticks of the pro-controller. + Calibration data is already applied by the kernel to all input values but may be used by user-space to perform other transformations. + Calibration data is detected by the kernel during device setup. You can write "scan\n" into this file to re-trigger calibration. You can also write data directly in the form "x1:y1 x2:y2" to diff --git a/Documentation/ABI/testing/sysfs-driver-samsung-laptop b/Documentation/ABI/testing/sysfs-driver-samsung-laptop index 34d3a3359cf4..28c9c040de5d 100644 --- a/Documentation/ABI/testing/sysfs-driver-samsung-laptop +++ b/Documentation/ABI/testing/sysfs-driver-samsung-laptop @@ -9,10 +9,12 @@ Description: Some Samsung laptops have different "performance levels" their fans quiet at all costs. Reading from this file will show the current performance level. Writing to the file can change this value. + Valid options: - "silent" - "normal" - "overclock" + - "silent" + - "normal" + - "overclock" + Note that not all laptops support all of these options. Specifically, not all support the "overclock" option, and it's still unknown if this value even changes @@ -25,8 +27,9 @@ Contact: Corentin Chary <corentin.chary@gmail.com> Description: Max battery charge level can be modified, battery cycle life can be extended by reducing the max battery charge level. - 0 means normal battery mode (100% charge) - 1 means battery life extender mode (80% charge) + + - 0 means normal battery mode (100% charge) + - 1 means battery life extender mode (80% charge) What: /sys/devices/platform/samsung/usb_charge Date: December 1, 2011 diff --git a/Documentation/ABI/testing/sysfs-driver-toshiba_acpi b/Documentation/ABI/testing/sysfs-driver-toshiba_acpi index f34221b52b14..e5a438d84e1f 100644 --- a/Documentation/ABI/testing/sysfs-driver-toshiba_acpi +++ b/Documentation/ABI/testing/sysfs-driver-toshiba_acpi @@ -4,10 +4,12 @@ KernelVersion: 3.15 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the keyboard backlight operation mode, valid values are: + * 0x1 -> FN-Z * 0x2 -> AUTO (also called TIMER) * 0x8 -> ON * 0x10 -> OFF + Note that from kernel 3.16 onwards this file accepts all listed parameters, kernel 3.15 only accepts the first two (FN-Z and AUTO). @@ -41,8 +43,10 @@ KernelVersion: 3.15 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This files controls the status of the touchpad and pointing stick (if available), valid values are: + * 0 -> OFF * 1 -> ON + Users: KToshiba What: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/TOS{1900,620{0,7,8}}:00/available_kbd_modes @@ -51,10 +55,12 @@ KernelVersion: 3.16 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file shows the supported keyboard backlight modes the system supports, which can be: + * 0x1 -> FN-Z * 0x2 -> AUTO (also called TIMER) * 0x8 -> ON * 0x10 -> OFF + Note that not all keyboard types support the listed modes. See the entry named "available_kbd_modes" Users: KToshiba @@ -65,6 +71,7 @@ KernelVersion: 3.16 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file shows the current keyboard backlight type, which can be: + * 1 -> Type 1, supporting modes FN-Z and AUTO * 2 -> Type 2, supporting modes TIMER, ON and OFF Users: KToshiba @@ -75,10 +82,12 @@ KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the USB Sleep & Charge charging mode, which can be: + * 0 -> Disabled (0x00) * 1 -> Alternate (0x09) * 2 -> Auto (0x21) * 3 -> Typical (0x11) + Note that from kernel 4.1 onwards this file accepts all listed values, kernel 4.0 only supports the first three. Note that this feature only works when connected to power, if @@ -93,8 +102,10 @@ Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the USB Sleep Functions under battery, and set the level at which point they will be disabled, accepted values can be: + * 0 -> Disabled * 1-100 -> Battery level to disable sleep functions + Currently it prints two values, the first one indicates if the feature is enabled or disabled, while the second one shows the current battery level set. @@ -107,8 +118,10 @@ Date: January 23, 2015 KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the USB Rapid Charge state, which can be: + * 0 -> Disabled * 1 -> Enabled + Note that toggling this value requires a reboot for changes to take effect. Users: KToshiba @@ -118,8 +131,10 @@ Date: January 23, 2015 KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the Sleep & Music state, which values can be: + * 0 -> Disabled * 1 -> Enabled + Note that this feature only works when connected to power, if you want to use it under battery, see the entry named "sleep_functions_on_battery" @@ -138,6 +153,7 @@ KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the state of the internal fan, valid values are: + * 0 -> OFF * 1 -> ON @@ -147,8 +163,10 @@ KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the Special Functions (hotkeys) operation mode, valid values are: + * 0 -> Normal Operation * 1 -> Special Functions + In the "Normal Operation" mode, the F{1-12} keys are as usual and the hotkeys are accessed via FN-F{1-12}. In the "Special Functions" mode, the F{1-12} keys trigger the @@ -163,8 +181,10 @@ KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls whether the laptop should turn ON whenever the LID is opened, valid values are: + * 0 -> Disabled * 1 -> Enabled + Note that toggling this value requires a reboot for changes to take effect. Users: KToshiba @@ -174,8 +194,10 @@ Date: February 12, 2015 KernelVersion: 4.0 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the USB 3 functionality, valid values are: + * 0 -> Disabled (Acts as a regular USB 2) * 1 -> Enabled (Full USB 3 functionality) + Note that toggling this value requires a reboot for changes to take effect. Users: KToshiba @@ -188,10 +210,14 @@ Description: This file controls the Cooling Method feature. Reading this file prints two values, the first is the actual cooling method and the second is the maximum cooling method supported. When the maximum cooling method is ONE, valid values are: + * 0 -> Maximum Performance * 1 -> Battery Optimized + When the maximum cooling method is TWO, valid values are: + * 0 -> Maximum Performance * 1 -> Performance * 2 -> Battery Optimized + Users: KToshiba diff --git a/Documentation/ABI/testing/sysfs-driver-toshiba_haps b/Documentation/ABI/testing/sysfs-driver-toshiba_haps index a662370b4dbf..c938690ce10d 100644 --- a/Documentation/ABI/testing/sysfs-driver-toshiba_haps +++ b/Documentation/ABI/testing/sysfs-driver-toshiba_haps @@ -4,10 +4,12 @@ KernelVersion: 3.17 Contact: Azael Avalos <coproscefalo@gmail.com> Description: This file controls the built-in accelerometer protection level, valid values are: + * 0 -> Disabled * 1 -> Low * 2 -> Medium * 3 -> High + The default potection value is set to 2 (Medium). Users: KToshiba diff --git a/Documentation/ABI/testing/sysfs-driver-wacom b/Documentation/ABI/testing/sysfs-driver-wacom index afc48fc163b5..16acaa5712ec 100644 --- a/Documentation/ABI/testing/sysfs-driver-wacom +++ b/Documentation/ABI/testing/sysfs-driver-wacom @@ -79,7 +79,9 @@ Description: When the Wacom Intuos 4 is connected over Bluetooth, the image has to contain 256 bytes (64x32 px 1 bit colour). The format is also scrambled, like in the USB mode, and it can - be summarized by converting 76543210 into GECA6420. + be summarized by converting:: + + 76543210 into GECA6420. HGFEDCBA HFDB7531 What: /sys/bus/hid/devices/<bus>:<vid>:<pid>.<n>/wacom_remote/unpair_remote diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi index 613f42a9d5cd..e4afc2538210 100644 --- a/Documentation/ABI/testing/sysfs-firmware-acpi +++ b/Documentation/ABI/testing/sysfs-firmware-acpi @@ -12,11 +12,14 @@ Description: image: The image bitmap. Currently a 32-bit BMP. status: 1 if the image is valid, 0 if firmware invalidated it. type: 0 indicates image is in BMP format. + + ======== =================================================== version: The version of the BGRT. Currently 1. xoffset: The number of pixels between the left of the screen and the left edge of the image. yoffset: The number of pixels between the top of the screen and the top edge of the image. + ======== =================================================== What: /sys/firmware/acpi/hotplug/ Date: February 2013 @@ -33,12 +36,14 @@ Description: The following setting is available to user space for each hotplug profile: + ======== ======================================================= enabled: If set, the ACPI core will handle notifications of - hotplug events associated with the given class of - devices and will allow those devices to be ejected with - the help of the _EJ0 control method. Unsetting it - effectively disables hotplug for the correspoinding - class of devices. + hotplug events associated with the given class of + devices and will allow those devices to be ejected with + the help of the _EJ0 control method. Unsetting it + effectively disables hotplug for the correspoinding + class of devices. + ======== ======================================================= The value of the above attribute is an integer number: 1 (set) or 0 (unset). Attempts to write any other values to it will @@ -71,86 +76,90 @@ Description: To figure out where all the SCI's are coming from, /sys/firmware/acpi/interrupts contains a file listing every possible source, and the count of how many - times it has triggered. - - $ cd /sys/firmware/acpi/interrupts - $ grep . * - error: 0 - ff_gbl_lock: 0 enable - ff_pmtimer: 0 invalid - ff_pwr_btn: 0 enable - ff_rt_clk: 2 disable - ff_slp_btn: 0 invalid - gpe00: 0 invalid - gpe01: 0 enable - gpe02: 108 enable - gpe03: 0 invalid - gpe04: 0 invalid - gpe05: 0 invalid - gpe06: 0 enable - gpe07: 0 enable - gpe08: 0 invalid - gpe09: 0 invalid - gpe0A: 0 invalid - gpe0B: 0 invalid - gpe0C: 0 invalid - gpe0D: 0 invalid - gpe0E: 0 invalid - gpe0F: 0 invalid - gpe10: 0 invalid - gpe11: 0 invalid - gpe12: 0 invalid - gpe13: 0 invalid - gpe14: 0 invalid - gpe15: 0 invalid - gpe16: 0 invalid - gpe17: 1084 enable - gpe18: 0 enable - gpe19: 0 invalid - gpe1A: 0 invalid - gpe1B: 0 invalid - gpe1C: 0 invalid - gpe1D: 0 invalid - gpe1E: 0 invalid - gpe1F: 0 invalid - gpe_all: 1192 - sci: 1194 - sci_not: 0 - - sci - The number of times the ACPI SCI - has been called and claimed an interrupt. - - sci_not - The number of times the ACPI SCI - has been called and NOT claimed an interrupt. - - gpe_all - count of SCI caused by GPEs. - - gpeXX - count for individual GPE source - - ff_gbl_lock - Global Lock - - ff_pmtimer - PM Timer - - ff_pwr_btn - Power Button - - ff_rt_clk - Real Time Clock - - ff_slp_btn - Sleep Button - - error - an interrupt that can't be accounted for above. - - invalid: it's either a GPE or a Fixed Event that - doesn't have an event handler. - - disable: the GPE/Fixed Event is valid but disabled. - - enable: the GPE/Fixed Event is valid and enabled. - - Root has permission to clear any of these counters. Eg. - # echo 0 > gpe11 - - All counters can be cleared by clearing the total "sci": - # echo 0 > sci + times it has triggered:: + + $ cd /sys/firmware/acpi/interrupts + $ grep . * + error: 0 + ff_gbl_lock: 0 enable + ff_pmtimer: 0 invalid + ff_pwr_btn: 0 enable + ff_rt_clk: 2 disable + ff_slp_btn: 0 invalid + gpe00: 0 invalid + gpe01: 0 enable + gpe02: 108 enable + gpe03: 0 invalid + gpe04: 0 invalid + gpe05: 0 invalid + gpe06: 0 enable + gpe07: 0 enable + gpe08: 0 invalid + gpe09: 0 invalid + gpe0A: 0 invalid + gpe0B: 0 invalid + gpe0C: 0 invalid + gpe0D: 0 invalid + gpe0E: 0 invalid + gpe0F: 0 invalid + gpe10: 0 invalid + gpe11: 0 invalid + gpe12: 0 invalid + gpe13: 0 invalid + gpe14: 0 invalid + gpe15: 0 invalid + gpe16: 0 invalid + gpe17: 1084 enable + gpe18: 0 enable + gpe19: 0 invalid + gpe1A: 0 invalid + gpe1B: 0 invalid + gpe1C: 0 invalid + gpe1D: 0 invalid + gpe1E: 0 invalid + gpe1F: 0 invalid + gpe_all: 1192 + sci: 1194 + sci_not: 0 + + =========== ================================================== + sci The number of times the ACPI SCI + has been called and claimed an interrupt. + + sci_not The number of times the ACPI SCI + has been called and NOT claimed an interrupt. + + gpe_all count of SCI caused by GPEs. + + gpeXX count for individual GPE source + + ff_gbl_lock Global Lock + + ff_pmtimer PM Timer + + ff_pwr_btn Power Button + + ff_rt_clk Real Time Clock + + ff_slp_btn Sleep Button + + error an interrupt that can't be accounted for above. + + invalid it's either a GPE or a Fixed Event that + doesn't have an event handler. + + disable the GPE/Fixed Event is valid but disabled. + + enable the GPE/Fixed Event is valid and enabled. + =========== ================================================== + + Root has permission to clear any of these counters. Eg.:: + + # echo 0 > gpe11 + + All counters can be cleared by clearing the total "sci":: + + # echo 0 > sci None of these counters has an effect on the function of the system, they are simply statistics. @@ -165,32 +174,34 @@ Description: Let's take power button fixed event for example, please kill acpid and other user space applications so that the machine won't shutdown - when pressing the power button. - # cat ff_pwr_btn - 0 enabled - # press the power button for 3 times; - # cat ff_pwr_btn - 3 enabled - # echo disable > ff_pwr_btn - # cat ff_pwr_btn - 3 disabled - # press the power button for 3 times; - # cat ff_pwr_btn - 3 disabled - # echo enable > ff_pwr_btn - # cat ff_pwr_btn - 4 enabled - /* - * this is because the status bit is set even if the enable bit is cleared, - * and it triggers an ACPI fixed event when the enable bit is set again - */ - # press the power button for 3 times; - # cat ff_pwr_btn - 7 enabled - # echo disable > ff_pwr_btn - # press the power button for 3 times; - # echo clear > ff_pwr_btn /* clear the status bit */ - # echo disable > ff_pwr_btn - # cat ff_pwr_btn - 7 enabled + when pressing the power button:: + + # cat ff_pwr_btn + 0 enabled + # press the power button for 3 times; + # cat ff_pwr_btn + 3 enabled + # echo disable > ff_pwr_btn + # cat ff_pwr_btn + 3 disabled + # press the power button for 3 times; + # cat ff_pwr_btn + 3 disabled + # echo enable > ff_pwr_btn + # cat ff_pwr_btn + 4 enabled + /* + * this is because the status bit is set even if the enable + * bit is cleared, and it triggers an ACPI fixed event when + * the enable bit is set again + */ + # press the power button for 3 times; + # cat ff_pwr_btn + 7 enabled + # echo disable > ff_pwr_btn + # press the power button for 3 times; + # echo clear > ff_pwr_btn /* clear the status bit */ + # echo disable > ff_pwr_btn + # cat ff_pwr_btn + 7 enabled diff --git a/Documentation/ABI/testing/sysfs-firmware-dmi-entries b/Documentation/ABI/testing/sysfs-firmware-dmi-entries index 210ad44b95a5..fe0289c87768 100644 --- a/Documentation/ABI/testing/sysfs-firmware-dmi-entries +++ b/Documentation/ABI/testing/sysfs-firmware-dmi-entries @@ -33,7 +33,7 @@ Description: doesn't matter), they will be represented in sysfs as entries "T-0" through "T-(N-1)": - Example entry directories: + Example entry directories:: /sys/firmware/dmi/entries/17-0 /sys/firmware/dmi/entries/17-1 @@ -50,61 +50,65 @@ Description: Each DMI entry in sysfs has the common header values exported as attributes: - handle : The 16bit 'handle' that is assigned to this + ======== ================================================= + handle The 16bit 'handle' that is assigned to this entry by the firmware. This handle may be referred to by other entries. - length : The length of the entry, as presented in the + length The length of the entry, as presented in the entry itself. Note that this is _not the total count of bytes associated with the - entry_. This value represents the length of + entry. This value represents the length of the "formatted" portion of the entry. This "formatted" region is sometimes followed by the "unformatted" region composed of nul terminated strings, with termination signalled by a two nul characters in series. - raw : The raw bytes of the entry. This includes the + raw The raw bytes of the entry. This includes the "formatted" portion of the entry, the "unformatted" strings portion of the entry, and the two terminating nul characters. - type : The type of the entry. This value is the same + type The type of the entry. This value is the same as found in the directory name. It indicates how the rest of the entry should be interpreted. - instance: The instance ordinal of the entry for the + instance The instance ordinal of the entry for the given type. This value is the same as found in the parent directory name. - position: The ordinal position (zero-based) of the entry + position The ordinal position (zero-based) of the entry within the entirety of the DMI entry table. + ======== ================================================= - === Entry Specialization === + **Entry Specialization** Some entry types may have other information available in sysfs. Not all types are specialized. - --- Type 15 - System Event Log --- + **Type 15 - System Event Log** This entry allows the firmware to export a log of events the system has taken. This information is typically backed by nvram, but the implementation details are abstracted by this table. This entry's data - is exported in the directory: + is exported in the directory:: - /sys/firmware/dmi/entries/15-0/system_event_log + /sys/firmware/dmi/entries/15-0/system_event_log and has the following attributes (documented in the SMBIOS / DMI specification under "System Event Log (Type 15)": - area_length - header_start_offset - data_start_offset - access_method - status - change_token - access_method_address - header_format - per_log_type_descriptor_length - type_descriptors_supported_count + - area_length + - header_start_offset + - data_start_offset + - access_method + - status + - change_token + - access_method_address + - header_format + - per_log_type_descriptor_length + - type_descriptors_supported_count As well, the kernel exports the binary attribute: - raw_event_log : The raw binary bits of the event log + ============= ==================================== + raw_event_log The raw binary bits of the event log as described by the DMI entry. + ============= ==================================== diff --git a/Documentation/ABI/testing/sysfs-firmware-gsmi b/Documentation/ABI/testing/sysfs-firmware-gsmi index 0faa0aaf4b6a..7a558354c1ee 100644 --- a/Documentation/ABI/testing/sysfs-firmware-gsmi +++ b/Documentation/ABI/testing/sysfs-firmware-gsmi @@ -20,7 +20,7 @@ Description: This directory has the same layout (and underlying implementation as /sys/firmware/efi/vars. - See Documentation/ABI/*/sysfs-firmware-efi-vars + See `Documentation/ABI/*/sysfs-firmware-efi-vars` for more information on how to interact with this structure. diff --git a/Documentation/ABI/testing/sysfs-firmware-memmap b/Documentation/ABI/testing/sysfs-firmware-memmap index eca0d65087dc..1f6f4d3a32c0 100644 --- a/Documentation/ABI/testing/sysfs-firmware-memmap +++ b/Documentation/ABI/testing/sysfs-firmware-memmap @@ -20,7 +20,7 @@ Description: the raw memory map to userspace. The structure is as follows: Under /sys/firmware/memmap there - are subdirectories with the number of the entry as their name: + are subdirectories with the number of the entry as their name:: /sys/firmware/memmap/0 /sys/firmware/memmap/1 @@ -34,14 +34,16 @@ Description: Each directory contains three files: - start : The start address (as hexadecimal number with the + ======== ===================================================== + start The start address (as hexadecimal number with the '0x' prefix). - end : The end address, inclusive (regardless whether the + end The end address, inclusive (regardless whether the firmware provides inclusive or exclusive ranges). - type : Type of the entry as string. See below for a list of + type Type of the entry as string. See below for a list of valid types. + ======== ===================================================== - So, for example: + So, for example:: /sys/firmware/memmap/0/start /sys/firmware/memmap/0/end @@ -57,9 +59,8 @@ Description: - reserved Following shell snippet can be used to display that memory - map in a human-readable format: + map in a human-readable format:: - -------------------- 8< ---------------------------------------- #!/bin/bash cd /sys/firmware/memmap for dir in * ; do @@ -68,4 +69,3 @@ Description: type=$(cat $dir/type) printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type" done - -------------------- >8 ---------------------------------------- diff --git a/Documentation/ABI/testing/sysfs-fs-ext4 b/Documentation/ABI/testing/sysfs-fs-ext4 index 78604db56279..99e3d92f8299 100644 --- a/Documentation/ABI/testing/sysfs-fs-ext4 +++ b/Documentation/ABI/testing/sysfs-fs-ext4 @@ -45,8 +45,8 @@ Description: parameter will have their blocks allocated out of a block group specific preallocation pool, so that small files are packed closely together. Each large file - will have its blocks allocated out of its own unique - preallocation pool. + will have its blocks allocated out of its own unique + preallocation pool. What: /sys/fs/ext4/<disk>/inode_readahead_blks Date: March 2008 diff --git a/Documentation/ABI/testing/sysfs-hypervisor-xen b/Documentation/ABI/testing/sysfs-hypervisor-xen index 53b7b2ea7515..4dbe0c49b393 100644 --- a/Documentation/ABI/testing/sysfs-hypervisor-xen +++ b/Documentation/ABI/testing/sysfs-hypervisor-xen @@ -15,14 +15,17 @@ KernelVersion: 4.3 Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com> Description: If running under Xen: Describes mode that Xen's performance-monitoring unit (PMU) - uses. Accepted values are - "off" -- PMU is disabled - "self" -- The guest can profile itself - "hv" -- The guest can profile itself and, if it is + uses. Accepted values are: + + ====== ============================================ + "off" PMU is disabled + "self" The guest can profile itself + "hv" The guest can profile itself and, if it is privileged (e.g. dom0), the hypervisor - "all" -- The guest can profile itself, the hypervisor + "all" The guest can profile itself, the hypervisor and all other guests. Only available to privileged guests. + ====== ============================================ What: /sys/hypervisor/pmu/pmu_features Date: August 2015 diff --git a/Documentation/ABI/testing/sysfs-kernel-boot_params b/Documentation/ABI/testing/sysfs-kernel-boot_params index eca38ce2852d..7f9bda453c4d 100644 --- a/Documentation/ABI/testing/sysfs-kernel-boot_params +++ b/Documentation/ABI/testing/sysfs-kernel-boot_params @@ -23,16 +23,17 @@ Description: The /sys/kernel/boot_params directory contains two representation of setup_data type. "data" file is the binary representation of setup_data payload. - The whole boot_params directory structure is like below: - /sys/kernel/boot_params - |__ data - |__ setup_data - | |__ 0 - | | |__ data - | | |__ type - | |__ 1 - | |__ data - | |__ type - |__ version + The whole boot_params directory structure is like below:: + + /sys/kernel/boot_params + |__ data + |__ setup_data + | |__ 0 + | | |__ data + | | |__ type + | |__ 1 + | |__ data + | |__ type + |__ version Users: Kexec diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-hugepages b/Documentation/ABI/testing/sysfs-kernel-mm-hugepages index fdaa2162fae1..294387e2c7fb 100644 --- a/Documentation/ABI/testing/sysfs-kernel-mm-hugepages +++ b/Documentation/ABI/testing/sysfs-kernel-mm-hugepages @@ -7,9 +7,11 @@ Description: of the hugepages supported by the kernel/CPU combination. Under these directories are a number of files: - nr_hugepages - nr_overcommit_hugepages - free_hugepages - surplus_hugepages - resv_hugepages + + - nr_hugepages + - nr_overcommit_hugepages + - free_hugepages + - surplus_hugepages + - resv_hugepages + See Documentation/admin-guide/mm/hugetlbpage.rst for details. diff --git a/Documentation/ABI/testing/sysfs-platform-asus-laptop b/Documentation/ABI/testing/sysfs-platform-asus-laptop index 8b0e8205a6a2..c78d358dbdbe 100644 --- a/Documentation/ABI/testing/sysfs-platform-asus-laptop +++ b/Documentation/ABI/testing/sysfs-platform-asus-laptop @@ -4,13 +4,16 @@ KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Description: This file allows display switching. The value - is composed by 4 bits and defined as follow: - 4321 - |||`- LCD - ||`-- CRT - |`--- TV - `---- DVI - Ex: - 0 (0000b) means no display + is composed by 4 bits and defined as follow:: + + 4321 + |||`- LCD + ||`-- CRT + |`--- TV + `---- DVI + + Ex: + - 0 (0000b) means no display - 3 (0011b) CRT+LCD. What: /sys/devices/platform/asus_laptop/gps @@ -28,8 +31,10 @@ Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Some models like the W1N have a LED display that can be used to display several items of information. - To control the LED display, use the following : + To control the LED display, use the following:: + echo 0x0T000DDD > /sys/devices/platform/asus_laptop/ + where T control the 3 letters display, and DDD the 3 digits display. The DDD table can be found in Documentation/admin-guide/laptops/asus-laptop.rst diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi b/Documentation/ABI/testing/sysfs-platform-asus-wmi index 1efac0ddb417..04885738cf15 100644 --- a/Documentation/ABI/testing/sysfs-platform-asus-wmi +++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi @@ -5,6 +5,7 @@ Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Change CPU clock configuration (write-only). There are three available clock configuration: + * 0 -> Super Performance Mode * 1 -> High Performance Mode * 2 -> Power Saving Mode diff --git a/Documentation/ABI/testing/sysfs-platform-at91 b/Documentation/ABI/testing/sysfs-platform-at91 index 4cc6a865ae66..b146be74b8e0 100644 --- a/Documentation/ABI/testing/sysfs-platform-at91 +++ b/Documentation/ABI/testing/sysfs-platform-at91 @@ -18,8 +18,10 @@ Description: In order to use an extended can_id add the CAN_EFF_FLAG (0x80000000U) to the can_id. Example: - - standard id 0x7ff: - echo 0x7ff > /sys/class/net/can0/mb0_id + - standard id 0x7ff:: - - extended id 0x1fffffff: - echo 0x9fffffff > /sys/class/net/can0/mb0_id + echo 0x7ff > /sys/class/net/can0/mb0_id + + - extended id 0x1fffffff:: + + echo 0x9fffffff > /sys/class/net/can0/mb0_id diff --git a/Documentation/ABI/testing/sysfs-platform-eeepc-laptop b/Documentation/ABI/testing/sysfs-platform-eeepc-laptop index 5b026c69587a..70dbe0733cf6 100644 --- a/Documentation/ABI/testing/sysfs-platform-eeepc-laptop +++ b/Documentation/ABI/testing/sysfs-platform-eeepc-laptop @@ -4,9 +4,11 @@ KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Description: This file allows display switching. + - 1 = LCD - 2 = CRT - 3 = LCD+CRT + If you run X11, you should use xrandr instead. What: /sys/devices/platform/eeepc/camera @@ -30,16 +32,20 @@ Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Change CPU clock configuration. On the Eee PC 1000H there are three available clock configuration: + * 0 -> Super Performance Mode * 1 -> High Performance Mode * 2 -> Power Saving Mode + On Eee PC 701 there is only 2 available clock configurations. Available configuration are listed in available_cpufv file. Reading this file will show the raw hexadecimal value which - is defined as follow: - | 8 bit | 8 bit | - | `---- Current mode - `------------ Availables modes + is defined as follow:: + + | 8 bit | 8 bit | + | `---- Current mode + `------------ Availables modes + For example, 0x301 means: mode 1 selected, 3 available modes. What: /sys/devices/platform/eeepc/available_cpufv diff --git a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop index 1b31be3f996a..fd2ac02bc5bd 100644 --- a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop +++ b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop @@ -12,6 +12,7 @@ Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>" Description: Change fan mode There are four available modes: + * 0 -> Super Silent Mode * 1 -> Standard Mode * 2 -> Dust Cleaning @@ -32,9 +33,11 @@ KernelVersion: 4.18 Contact: "Oleg Keri <ezhi99@gmail.com>" Description: Control fn-lock mode. + * 1 -> Switched On * 0 -> Switched Off - For example: - # echo "0" > \ - /sys/bus/pci/devices/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock + For example:: + + # echo "0" > \ + /sys/bus/pci/devices/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock diff --git a/Documentation/ABI/testing/sysfs-platform-intel-wmi-thunderbolt b/Documentation/ABI/testing/sysfs-platform-intel-wmi-thunderbolt index 8af65059d519..e19144fd5d86 100644 --- a/Documentation/ABI/testing/sysfs-platform-intel-wmi-thunderbolt +++ b/Documentation/ABI/testing/sysfs-platform-intel-wmi-thunderbolt @@ -7,5 +7,6 @@ Description: Thunderbolt controllers to turn on or off when no devices are connected (write-only) There are two available states: + * 0 -> Force power disabled * 1 -> Force power enabled diff --git a/Documentation/ABI/testing/sysfs-platform-sst-atom b/Documentation/ABI/testing/sysfs-platform-sst-atom index 0d07c0395660..d5f6e21f0e42 100644 --- a/Documentation/ABI/testing/sysfs-platform-sst-atom +++ b/Documentation/ABI/testing/sysfs-platform-sst-atom @@ -5,13 +5,22 @@ Contact: "Sebastien Guiriec" <sebastien.guiriec@intel.com> Description: LPE Firmware version for SST driver on all atom plaforms (BYT/CHT/Merrifield/BSW). - If the FW has never been loaded it will display: + If the FW has never been loaded it will display:: + "FW not yet loaded" - If FW has been loaded it will display: + + If FW has been loaded it will display:: + "v01.aa.bb.cc" + aa: Major version is reflecting SoC version: + + === ============= 0d: BYT FW 0b: BSW FW 07: Merrifield FW + === ============= + bb: Minor version + cc: Build version diff --git a/Documentation/ABI/testing/sysfs-platform-usbip-vudc b/Documentation/ABI/testing/sysfs-platform-usbip-vudc index 81fcfb454913..53622d3ba27c 100644 --- a/Documentation/ABI/testing/sysfs-platform-usbip-vudc +++ b/Documentation/ABI/testing/sysfs-platform-usbip-vudc @@ -16,10 +16,13 @@ Contact: Krzysztof Opasiak <k.opasiak@samsung.com> Description: Current status of the device. Allowed values: - 1 - Device is available and can be exported - 2 - Device is currently exported - 3 - Fatal error occurred during communication - with peer + + == ========================================== + 1 Device is available and can be exported + 2 Device is currently exported + 3 Fatal error occurred during communication + with peer + == ========================================== What: /sys/devices/platform/usbip-vudc.%d/usbip_sockfd Date: April 2016 diff --git a/Documentation/ABI/testing/sysfs-ptp b/Documentation/ABI/testing/sysfs-ptp index a17f817a9309..2363ad810ddb 100644 --- a/Documentation/ABI/testing/sysfs-ptp +++ b/Documentation/ABI/testing/sysfs-ptp @@ -69,7 +69,7 @@ Description: pin offered by the PTP hardware clock. The file name is the hardware dependent pin name. Reading from this file produces two numbers, the assigned function (see - the PTP_PF_ enumeration values in linux/ptp_clock.h) + the `PTP_PF_` enumeration values in linux/ptp_clock.h) and the channel number. The function and channel assignment may be changed by two writing numbers into the file. |