From 1590ac2c6615329d30e25753e03c295cdaf2ae44 Mon Sep 17 00:00:00 2001 From: Shyam Sundar S K Date: Thu, 22 Sep 2022 18:42:02 +0530 Subject: Documentation/ABI/testing/sysfs-amd-pmf: Add ABI doc for AMD PMF 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 and also update MAINTAINERS file with this new information Reviewed-by: Hans de Goede Signed-off-by: Shyam Sundar S K Link: https://lore.kernel.org/r/20220922131202.56529-4-Shyam-sundar.S-k@amd.com Signed-off-by: Hans de Goede --- Documentation/ABI/testing/sysfs-amd-pmf | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-amd-pmf (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-amd-pmf b/Documentation/ABI/testing/sysfs-amd-pmf new file mode 100644 index 000000000000..7fc0e1c2b76b --- /dev/null +++ b/Documentation/ABI/testing/sysfs-amd-pmf @@ -0,0 +1,13 @@ +What: /sys/devices/platform/*/cnqf_enable +Date: September 2022 +Contact: Shyam Sundar S K +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. + Note: Systems that support auto mode will not have this sysfs file + available. -- cgit v1.2.3