From: Shyam Sundar S K Date: Thu, 22 Sep 2022 13:12:02 +0000 (+0530) Subject: Documentation/ABI/testing/sysfs-amd-pmf: Add ABI doc for AMD PMF X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1590ac2c6615329d30e25753e03c295cdaf2ae44;p=linux.git 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 --- diff --git a/Documentation/ABI/testing/sysfs-amd-pmf b/Documentation/ABI/testing/sysfs-amd-pmf new file mode 100644 index 0000000000000..7fc0e1c2b76b4 --- /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. diff --git a/MAINTAINERS b/MAINTAINERS index 6bb894ea4a77b..5a918c703b639 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1026,6 +1026,7 @@ AMD PMF DRIVER M: Shyam Sundar S K L: platform-driver-x86@vger.kernel.org S: Maintained +F: Documentation/ABI/testing/sysfs-amd-pmf F: drivers/platform/x86/amd/pmf/ AMD HSMP DRIVER