[PATCH v2 3/3] doc: TPMI: Add debugfs documentation

[Srinivas Pandruvada]

Describe fields in the TPMI debugfs folder.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
---
v2
New.

 Documentation/ABI/testing/debugfs-tpmi | 31 ++++++++++++++++++++++++++
 MAINTAINERS                            |  1 +
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/ABI/testing/debugfs-tpmi

diff --git a/Documentation/ABI/testing/debugfs-tpmi b/Documentation/ABI/testing/debugfs-tpmi
new file mode 100644
index 000000000000..9b530c1aaa2d
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-tpmi
@@ -0,0 +1,31 @@
+What:		/sys/kernel/debug/tpmi-<n>/pfs_dump
+Date:		December 2023
+KernelVersion:	6.6
+Contact:	srinivas.pandruvada@xxxxxxxxxxxxxxx
+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:		December 2023
+KernelVersion:	6.6
+Contact:	srinivas.pandruvada@xxxxxxxxxxxxxxx
+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:		December 2023
+KernelVersion:	6.6
+Contact:	srinivas.pandruvada@xxxxxxxxxxxxxxx
+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
diff --git a/MAINTAINERS b/MAINTAINERS
index 5761b02183a7..4d439121fb36 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10720,6 +10720,7 @@ INTEL TPMI DRIVER
 M:	Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
 L:	platform-driver-x86@xxxxxxxxxxxxxxx
 S:	Maintained
+F:	Documentation/ABI/testing/debugfs-tpmi
 F:	drivers/platform/x86/intel/tpmi.c
 F:	include/linux/intel_tpmi.h
 
-- 
2.40.1