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 Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> --- Documentation/ABI/testing/sysfs-amd-pmf | 12 ++++++++++++ MAINTAINERS | 1 + 2 files changed, 13 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-amd-pmf diff --git a/Documentation/ABI/testing/sysfs-amd-pmf b/Documentation/ABI/testing/sysfs-amd-pmf new file mode 100644 index 000000000000..fec2be7178e2 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-amd-pmf @@ -0,0 +1,12 @@ +What: /sys/devices/platform/*/cnqf_enable +Date: September 2022 +Contact: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> +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 d74bf90f5056..255527be7e24 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1026,6 +1026,7 @@ AMD PMF DRIVER M: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> L: platform-driver-x86@xxxxxxxxxxxxxxx S: Maintained +F: Documentation/ABI/testing/sysfs-amd-pmf F: drivers/platform/x86/amd/pmf/ AMD HSMP DRIVER -- 2.25.1
