Commit 40e6c395 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Hans de Goede
Browse files

doc: TPMI: Add debugfs documentation 



Describe fields in the TPMI debugfs folder.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230712225950.171326-4-srinivas.pandruvada@linux.intel.com


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent b326c1bb

Documentation/ABI/testing/debugfs-tpmi

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What:		/sys/kernel/debug/tpmi-<n>/pfs_dump

Date:		November 2023

KernelVersion:	6.6

Contact:	srinivas.pandruvada@linux.intel.com

Description:

The PFS (PM Feature Structure) table, shows details of each power

management feature. This includes:

tpmi_id, number of entries, entry size, offset, vsec offset, lock status

and disabled status.

Users:		Debugging, any user space test suite



What:		/sys/kernel/debug/tpmi-<n>/tpmi-id-<n>/mem_dump

Date:		November 2023

KernelVersion:	6.6

Contact:	srinivas.pandruvada@linux.intel.com

Description:

Shows the memory dump of the MMIO region for a TPMI ID.

Users:		Debugging, any user space test suite



What:		/sys/kernel/debug/tpmi-<n>/tpmi-id-<n>/mem_write

Date:		November 2023

KernelVersion:	6.6

Contact:	srinivas.pandruvada@linux.intel.com

Description:

Allows to write at any offset. It doesn't check for Read/Write access

as hardware will not allow to write at read-only memory. This write is

at offset multiples of 4. The format is instance,offset,contents.

Example:

echo 0,0x20,0xff > mem_write

echo 1,64,64 > mem_write

Users:		Debugging, any user space test suite

MAINTAINERS

+1 −0
Original line number Diff line number Diff line
@@ -10732,6 +10732,7 @@ INTEL TPMI DRIVER 
M:	Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

L:	platform-driver-x86@vger.kernel.org

S:	Maintained

F:	Documentation/ABI/testing/debugfs-tpmi

F:	drivers/platform/x86/intel/tpmi.c

F:	include/linux/intel_tpmi.h