Merge tag 'iio-for-5.6a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of new device support, features and cleanups for IIO in the 5.6 cycle

New device support

* ad7091r5 ADC
  - New driver with follow up patch adding scale and vref support.
  - DT bindings
* ad7923
  - Support for ad7908, ad7918 and ad7928 added to driver.
* bma180
  - Support the BMA254 accelerometer. Required fairly substantial rework
    to allow for small differences between this an existing parts.
* bma400 accelerometer
  - New driver with follow up patch for regulator support.
  - DT bindings.
* asc dlhl60d
  - New driver support this range of pressure and temperature sensors.
  - DT bindings.
* ltc2496 ADC
  - New driver to support this ADC.
  - Split the existing LTC2497 driver generic component out and reuse.
  - DT bindings.
* parallax ping
  - New driver supporting ultrasonic and laser tof distance sensors.
  - Bindings for these sensors.

New features

* core
  - New char type for read_raw returns, used for thermocouple types.
  - Rename read_first_n callback to read.   The reasons behind the original
    naming are lost to the mists of time.
* ad799x
  - Allow pm_ops to disable device completely allowing regulator power down.
* bma180
  - Enable basic regulator support.
* dmaengine buffer
  - Report platform data alignment requirements via new ABI.
* max31856
  - Add option to set mains filter rejection frequency and document
    new in_temp_filter_notch_center_frequency ABI.
  - Add support for configuring HW averaging (oversampling ratio)
  - Add runtime configuration of thermocouple type and document new ABI.
* maxim-thermocouple
  - Add read only access to thermocouple type using new ABI, includes
    adding more specific compatibles to reflect which variant of the
    chip is being used.
* mpu6050
  - Provide option to support the PMU9150 in package magnetometer directly
    rather than via auxiliary bus.
* stm32_adc
  - Add overrun interrupt checks to detect if this happens.
* st_lsm6dsx
  - Enable the sensor-hub support for lsm6dsm. Includes various reworks to
    allow this.

Cleanups and minor fixes

* Subsystem wide
  - Tidy up indentation in Kconfig and fix alphabetical order of AD7091R5.
  - Drop linux/gpio.h and linux/of_gpio.h from drivers that don't use them.
* ad7266
  - Convert to GPIO descriptors.
* ad7303
  - Avoid a dance with checking if the regulator is supplied by just
    using the optional request interface.
* ad7887
  - Simplify channel specification assignment to enable adding more devices.
* ad7923
  - Drop some unused and largely pointless defines of BOB_N==N variety.
  - Tidy up checkpatch warnings.
  - Add missing of_device_id table.
* adf4350
  - Convert to GPIO descriptors.
* ak8975
  - Convert to GPIO descriptors.
* ADIS library and drivers
  - Expand scope of txrx_lock to cover all state and rename as state_lock
  - Add unlocked read / write to allow grouping of consecutive calls under
    single lock / unlock.
  - Add unlocked check_status, reset to allow grouping under single
    lock / unlock.
  - Remove remaining uses of core mlock for local state protection.
    mlock should never be used directly as it protects tightly defined
    core IIO device management state.
* adis16240
  - Enforce only supported SPI mode on driver load + add DT binding doc.
* atlas-ph-sensor
  - Rename to atlas-sensor given it now covers things beyond ph sensors.
* bma180
  - Use local dev variable to tidy up code.
  - Use c99 style explicity .member assignment to make driver more readable.
* bmp280
  - Drop ACPI support. No evidence this was used and appropriate ID is not
    registered.
  - Allow ACPI to bind device via PRP0001
* dmaengine buffer
  - Use dma_request_chan instead of dma_request_slave_channel_reason as that
    ABI is going away.
  - Add module info to avoid tainting the kernel.
* hts221
  - Avoid magic number defines when only used to fill structure elements
    that are self describing.
* lm3533
  - Drop a stray semicolon.
* max9611
  - Cleanup enum handling to be more resilient to future changes.
* mpu6050
  - Delete MPU9150 from supported SPI devices as doesn't provide SPI.
  - Select I2C_MUX again after kbuild issue fixed elsewhere.
* stm32-timer
  - Drop an unnecessary register update.
* ssp_sensors
  - Convert to GPIO descriptors.
* st_sensors
  - drop !CONFIG_ACPI defines as ACPI_PTR() will stop them being used
    anyway.
  - Make default platform data structures __maybe_unsued.
  - Fill in some missing kernel-doc function parameters.
* st_lsm6dsx
  - white space fixes.
  - Mark some constants that aren't always used as __maybe_unused.
  - Drop of ID table guards as they just pervent use under ACPI.
  - Switch to device properties to allow ACPI usage.
* st_uvis25
  - Drop acpi.h include as no ACPI APIs used.
* ti-ads1015
  - Drop legacy platform data as no one seems to be using it.
  - Use the device property API instead of OF specific.
* ti-ads7950
  - typo fix in error message.

* tag 'iio-for-5.6a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (99 commits)
  iio: accel: bma180: BMA254 support
  iio: pressure: bmp280: Allow device to be enumerated from ACPI
  iio: pressure: bmp280: Drop ACPI support
  dt-bindings: iio: adc: convert sd modulator to json-schema
  iio: buffer: rename 'read_first_n' callback to 'read'
  iio: buffer-dmaengine: Report buffer length requirements
  bindings: iio: pressure: Add documentation for dlh driver
  dt-bindings: Add asc vendor
  iio: pressure: Add driver for DLH pressure sensors
  iio: buffer-dmaengine: Add module information
  iio: accel: bma180: Use explicit member assignment
  iio: accel: bma180: Basic regulator support
  iio: accel: bma180: Add dev helper variable
  iio: imu: st_lsm6dsx: enable sensor-hub support for lsm6dsm
  iio: imu: st_lsm6dsx: rename st_lsm6dsx_shub_read_reg in st_lsm6dsx_shub_read_output
  iio: imu: st_lsm6dsx: check if shub_output reg is located in primary page
  iio: imu: st_lsm6dsx: check if pull_up is located in primary page
  iio: imu: st_lsm6dsx: check if master_enable is located in primary page
  iio: imu: st_lsm6dsx: export max num of slave devices in st_lsm6dsx_shub_settings
  iio: light: remove unneeded semicolon
  ...

10 files changed, 353 insertions, 17 deletions

diff --git a/Documentation/devicetree/bindings/iio/accel/adi,adis16240.yaml b/Documentation/devicetree/bindings/iio/accel/adi,adis16240.yaml
new file mode 100644
index 000000000000..4147f02b5e3c
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/accel/adi,adis16240.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/accel/adi,adis16240.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADIS16240 Programmable Impact Sensor and Recorder driver
+
+maintainers:
+  - Alexandru Ardelean <alexandru.ardelean@analog.com>
+
+description: |
+  ADIS16240 Programmable Impact Sensor and Recorder driver that supports
+  SPI interface.
+    https://www.analog.com/en/products/adis16240.html
+
+properties:
+  compatible:
+    enum:
+      - adi,adis16240
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* Example for a SPI device node */
+        accelerometer@0 {
+            compatible = "adi,adis16240";
+            reg = <0>;
+            spi-max-frequency = <2500000>;
+            interrupt-parent = <&gpio0>;
+            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/iio/accel/bma180.txt b/Documentation/devicetree/bindings/iio/accel/bma180.txt
index 3b25b4c4d446..f53237270b32 100644
--- a/Documentation/devicetree/bindings/iio/accel/bma180.txt
+++ b/Documentation/devicetree/bindings/iio/accel/bma180.txt
@@ -1,11 +1,14 @@
-* Bosch BMA180 / BMA250 triaxial acceleration sensor
+* Bosch BMA180 / BMA25x triaxial acceleration sensor
 
 http://omapworld.com/BMA180_111_1002839.pdf
 http://ae-bst.resource.bosch.com/media/products/dokumente/bma250/bst-bma250-ds002-05.pdf
 
 Required properties:
 
-  - compatible : should be "bosch,bma180" or "bosch,bma250"
+  - compatible : should be one of:
+    "bosch,bma180"
+    "bosch,bma250"
+    "bosch,bma254"
   - reg : the I2C address of the sensor
 
 Optional properties:
diff --git a/Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml b/Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml
new file mode 100644
index 000000000000..c1c6d6f223cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/accel/bosch,bma400.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bosch BMA400 triaxial acceleration sensor
+
+maintainers:
+  - Dan Robertson <dan@dlrobertson.com>
+
+description: |
+  Acceleration and temperature iio sensors with an i2c interface
+
+  Specifications about the sensor can be found at:
+    https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMA400-DS000.pdf
+
+properties:
+  compatible:
+    enum:
+      - bosch,bma400
+
+  reg:
+    maxItems: 1
+
+  vdd-supply:
+    description: phandle to the regulator that provides power to the accelerometer
+
+  vddio-supply:
+    description: phandle to the regulator that provides power to the sensor's IO
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      accelerometer@14 {
+        compatible = "bosch,bma400";
+        reg = <0x14>;
+        vdd-supply = <&vdd>;
+        vddio-supply = <&vddio>;
+        interrupt-parent = <&gpio0>;
+        interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+      };
+    };
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
new file mode 100644
index 000000000000..31ffa275f5fa
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7091r5.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7091R5 4-Channel 12-Bit ADC
+
+maintainers:
+  - Beniamin Bia <beniamin.bia@analog.com>
+
+description: |
+  Analog Devices AD7091R5 4-Channel 12-Bit ADC
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7091r5
+
+  reg:
+    maxItems: 1
+
+  vref-supply:
+    description:
+      Phandle to the vref power supply
+
+  interrupts:
+    maxItems: 1
+
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@2f {
+                compatible = "adi,ad7091r5";
+                reg = <0x2f>;
+
+                interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+                interrupt-parent = <&gpio>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml b/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml
new file mode 100644
index 000000000000..59009997dca0
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/lltc,ltc2496.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/lltc,ltc2496.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Linear Technology / Analog Devices LTC2496 ADC
+
+maintainers:
+ - Lars-Peter Clausen <lars@metafoo.de>
+ - Michael Hennerich <Michael.Hennerich@analog.com>
+ - Stefan Popa <stefan.popa@analog.com>
+
+properties:
+  compatible:
+    enum:
+      - lltc,ltc2496
+
+  vref-supply:
+    description: phandle to an external regulator providing the reference voltage
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/phandle
+
+  reg:
+    description: spi chipselect number according to the usual spi bindings
+
+  spi-max-frequency:
+    description: maximal spi bus frequency supported
+
+required:
+  - compatible
+  - vref-supply
+  - reg
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+            compatible = "lltc,ltc2496";
+            reg = <0>;
+            vref-supply = <&ltc2496_reg>;
+            spi-max-frequency = <2000000>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt
deleted file mode 100644
index 59b92cd32552..000000000000
--- a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-Device-Tree bindings for sigma delta modulator
-
-Required properties:
-- compatible: should be "ads1201", "sd-modulator". "sd-modulator" can be use
-	as a generic SD modulator if modulator not specified in compatible list.
-- #io-channel-cells = <0>: See the IIO bindings section "IIO consumers".
-
-Example node:
-
-	ads1202: adc {
-		compatible = "sd-modulator";
-		#io-channel-cells = <0>;
-	};
diff --git a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
new file mode 100644
index 000000000000..a390343d0c2a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/sigma-delta-modulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Device-Tree bindings for sigma delta modulator
+
+maintainers:
+  - Arnaud Pouliquen <arnaud.pouliquen@st.com>
+
+properties:
+  compatible:
+    description: |
+      "sd-modulator" can be used as a generic SD modulator,
+      if the modulator is not specified in the compatible list.
+    enum:
+      - sd-modulator
+      - ads1201
+
+  '#io-channel-cells':
+    const: 0
+
+required:
+  - compatible
+  - '#io-channel-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    ads1202: adc {
+      compatible = "sd-modulator";
+      #io-channel-cells = <0>;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/iio/pressure/asc,dlhl60d.yaml b/Documentation/devicetree/bindings/iio/pressure/asc,dlhl60d.yaml
new file mode 100644
index 000000000000..9f5ca9c42025
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/pressure/asc,dlhl60d.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/pressure/asc,dlhl60d.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: All Sensors DLH series low voltage digital pressure sensors
+
+maintainers:
+  - Tomislav Denis <tomislav.denis@avl.com>
+
+description: |
+  Bindings for the All Sensors DLH series pressure sensors.
+
+  Specifications about the sensors can be found at:
+    http://www.allsensors.com/cad/DS-0355_Rev_B.PDF
+
+properties:
+  compatible:
+    enum:
+      - asc,dlhl60d
+      - asc,dlhl60g
+
+  reg:
+    description: I2C device address
+    maxItems: 1
+
+  interrupts:
+    description: interrupt mapping for EOC(data ready) pin
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pressure@29 {
+            compatible = "asc,dlhl60d";
+            reg = <0x29>;
+            interrupt-parent = <&gpio0>;
+            interrupts = <10 IRQ_TYPE_EDGE_RISING>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml b/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
new file mode 100644
index 000000000000..a079c9921af6
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/proximity/parallax-ping.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Parallax PING))) and LaserPING range finder
+
+maintainers:
+  - Andreas Klinger <ak@it-klinger.de>
+
+description: |
+  Bit-banging driver using one GPIO:
+  - ping-gpios is raised by the driver to start measurement
+  - direction of ping-gpio is then switched into input with an interrupt
+    for receiving distance value as PWM signal
+
+  Specifications about the devices can be found at:
+  http://parallax.com/sites/default/files/downloads/28041-LaserPING-2m-Rangefinder-Guide.pdf
+  http://parallax.com/sites/default/files/downloads/28015-PING-Documentation-v1.6.pdf
+
+properties:
+  compatible:
+    enum:
+      - parallax,ping
+      - parallax,laserping
+
+  ping-gpios:
+    description:
+      Definition of the GPIO for the triggering and echo (output and input)
+      This GPIO is set for about 5 us by the driver to tell the device it
+      should initiate the measurement cycle. Afterwards the GPIO is switched
+      to input direction with an interrupt. The device sets it and the
+      length of the input signal corresponds to the measured distance.
+      It needs to be an GPIO which is able to deliver an interrupt because
+      the time between two interrupts is measured in the driver.
+      See Documentation/devicetree/bindings/gpio/gpio.txt for information
+      on how to specify a consumer gpio.
+    maxItems: 1
+
+required:
+  - compatible
+  - ping-gpios
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    proximity {
+        compatible = "parallax,laserping";
+        ping-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+    };
diff --git a/Documentation/devicetree/bindings/iio/temperature/maxim_thermocouple.txt b/Documentation/devicetree/bindings/iio/temperature/maxim_thermocouple.txt
index 28bc5c4d965b..bb85cd0e039c 100644
--- a/Documentation/devicetree/bindings/iio/temperature/maxim_thermocouple.txt
+++ b/Documentation/devicetree/bindings/iio/temperature/maxim_thermocouple.txt
@@ -5,7 +5,10 @@ Maxim thermocouple support
 
 Required properties:
 
-	- compatible: must be "maxim,max31855" or "maxim,max6675"
+	- compatible: must be "maxim,max6675" or one of the following:
+	   "maxim,max31855k", "maxim,max31855j", "maxim,max31855n",
+	   "maxim,max31855s", "maxim,max31855t", "maxim,max31855e",
+	   "maxim,max31855r"; the generic "max,max31855" is deprecated.
 	- reg: SPI chip select number for the device
 	- spi-max-frequency: must be 4300000
 	- spi-cpha: must be defined for max6675 to enable SPI mode 1
@@ -15,7 +18,7 @@ Required properties:
 Example:
 
 	max31855@0 {
-		compatible = "maxim,max31855";
+		compatible = "maxim,max31855k";
 		reg = <0>;
 		spi-max-frequency = <4300000>;
 	};