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authorJarkko Sakkinen2015-05-20 16:44:40 +0300
committerPeter Huewe2015-10-19 01:01:20 +0200
commitb8e98dcdc5ad24bbecc763cd0ac87bbde602e5ea (patch)
treeed8c7e868e682461f535c07f147baa53be052a89 /Documentation/ABI/testing/sysfs-driver-ppi
parent9b774d5cf2db4b27324784e8d2c95a06cdf82373 (diff)
tpm: update PPI documentation to address the location change.
Updated Documentation/ABI/testing/sysfs-driver-ppi in order to explain where PPI attributes are located and how backwards compatibility is addressed. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-ppi')
-rw-r--r--Documentation/ABI/testing/sysfs-driver-ppi19
1 files changed, 12 insertions, 7 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-ppi b/Documentation/ABI/testing/sysfs-driver-ppi
index 7d1435bc976c..9921ef285899 100644
--- a/Documentation/ABI/testing/sysfs-driver-ppi
+++ b/Documentation/ABI/testing/sysfs-driver-ppi
@@ -1,4 +1,4 @@
-What: /sys/devices/pnp0/<bus-num>/ppi/
+What: /sys/class/tpm/tpmX/ppi/
Date: August 2012
Kernel Version: 3.6
Contact: xiaoyan.zhang@intel.com
@@ -8,9 +8,14 @@ Description:
folder makes sense. The folder path can be got by command
'find /sys/ -name 'pcrs''. For the detail information of PPI,
please refer to the PPI specification from
+
http://www.trustedcomputinggroup.org/
-What: /sys/devices/pnp0/<bus-num>/ppi/version
+ In Linux 4.2 ppi was moved to the character device directory.
+ A symlink from tpmX/device/ppi to tpmX/ppi to provide backwards
+ compatibility.
+
+What: /sys/class/tpm/tpmX/ppi/version
Date: August 2012
Contact: xiaoyan.zhang@intel.com
Description:
@@ -18,7 +23,7 @@ Description:
platform.
This file is readonly.
-What: /sys/devices/pnp0/<bus-num>/ppi/request
+What: /sys/class/tpm/tpmX/ppi/request
Date: August 2012
Contact: xiaoyan.zhang@intel.com
Description:
@@ -28,7 +33,7 @@ Description:
integer value range from 1 to 160, and 0 means no request.
This file can be read and written.
-What: /sys/devices/pnp0/00:<bus-num>/ppi/response
+What: /sys/class/tpm/tpmX/ppi/response
Date: August 2012
Contact: xiaoyan.zhang@intel.com
Description:
@@ -37,7 +42,7 @@ Description:
: <response description>".
This file is readonly.
-What: /sys/devices/pnp0/<bus-num>/ppi/transition_action
+What: /sys/class/tpm/tpmX/ppi/transition_action
Date: August 2012
Contact: xiaoyan.zhang@intel.com
Description:
@@ -47,7 +52,7 @@ Description:
description>".
This file is readonly.
-What: /sys/devices/pnp0/<bus-num>/ppi/tcg_operations
+What: /sys/class/tpm/tpmX/ppi/tcg_operations
Date: August 2012
Contact: xiaoyan.zhang@intel.com
Description:
@@ -58,7 +63,7 @@ Description:
This attribute is only supported by PPI version 1.2+.
This file is readonly.
-What: /sys/devices/pnp0/<bus-num>/ppi/vs_operations
+What: /sys/class/tpm/tpmX/ppi/vs_operations
Date: August 2012
Contact: xiaoyan.zhang@intel.com
Description: