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Diffstat (limited to 'Documentation/ABI/testing/sysfs-platform_profile')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform_profile | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform_profile b/Documentation/ABI/testing/sysfs-platform_profile new file mode 100644 index 000000000000..baf1d125f9f8 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform_profile @@ -0,0 +1,35 @@ +What: /sys/firmware/acpi/platform_profile_choices +Date: October 2020 +Contact: Hans de Goede <hdegoede@redhat.com> +Description: This file contains a space-separated list of profiles supported for this device. + + Drivers must use the following standard profile-names: + + ==================== ======================================== + low-power Low power consumption + cool Cooler operation + quiet Quieter operation + balanced Balance between low power consumption + and performance + balanced-performance Balance between performance and low + power consumption with a slight bias + towards performance + performance High performance operation + ==================== ======================================== + + Userspace may expect drivers to offer more than one of these + standard profile names. + +What: /sys/firmware/acpi/platform_profile +Date: October 2020 +Contact: Hans de Goede <hdegoede@redhat.com> +Description: Reading this file gives the current selected profile for this + device. Writing this file with one of the strings from + platform_profile_choices changes the profile to the new value. + + This file can be monitored for changes by polling for POLLPRI, + POLLPRI will be signalled on any changes, independent of those + changes coming from a userspace write; or coming from another + source such as e.g. a hotkey triggered profile change handled + either directly by the embedded-controller or fully handled + inside the kernel. |