Commit b8e98dcd authored by Jarkko Sakkinen's avatar Jarkko Sakkinen Committed by Peter Huewe
Browse files

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: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: default avatarPeter Huewe <peterhuewe@gmx.de>
parent 9b774d5c

Documentation/ABI/testing/sysfs-driver-ppi

+12 −7
Original line number Diff line number Diff line 
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:

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