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[3/4] Documentation/ABI/testing/sysfs-amd-pmf: Add ABI doc for AMD PMF

Message ID 20220823102913.4181217-4-Shyam-sundar.S-k@amd.com (mailing list archive)
State Changes Requested, archived
Headers show
Series platform/x86/amd/pmf: Introduce CnQF feature for AMD PMF | expand

Commit Message

Shyam Sundar S K Aug. 23, 2022, 10:29 a.m. UTC
AMD PMF driver provides the flexibility to turn "on" or "off"
CnQF feature (introduced in the earlier patch).

Add corresponding ABI documentation for the new sysfs node.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
 Documentation/ABI/testing/sysfs-amd-pmf | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-amd-pmf
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diff --git a/Documentation/ABI/testing/sysfs-amd-pmf b/Documentation/ABI/testing/sysfs-amd-pmf
new file mode 100644
index 000000000000..5935dc549185
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-amd-pmf
@@ -0,0 +1,11 @@ 
+What:		/sys/devices/platform/AMDI0102\:00/cnqf/feat
+Date:		July 2022
+Contact:	Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+Description:	Reading this file tells if the AMD Platform Management(PMF)
+		Cool n Quiet Framework(CnQF) feature is enabled or not.
+		This feature is not enabled by default and gets only turned on
+		if OEM BIOS passes a "flag" to PMF ACPI function (index 11 or 12)
+		or in case the user writes "on".
+		To turn off CnQF user can write "off" to the sysfs node.