diff options
| author | Daniel Dadap <ddadap@nvidia.com> | 2021-09-03 03:38:39 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-09-14 13:26:00 +0300 |
| commit | ad62cd93198bde6644ecb5ff8f6f4c5394b5821a (patch) | |
| tree | 8b133243ce926b7761e76a40b39371a1d9d393c0 /drivers/platform/x86/Kconfig | |
| parent | 4c51ba9af42dff0ef6a2ca3edcefa76f3466959e (diff) | |
| download | linux-ad62cd93198bde6644ecb5ff8f6f4c5394b5821a.tar.xz | |
platform/x86: Add driver for ACPI WMAA EC-based backlight control
A number of upcoming notebook computer designs drive the internal
display panel's backlight PWM through the Embedded Controller (EC).
This EC-based backlight control can be plumbed through to an ACPI
"WMAA" method interface, which in turn can be wrapped by WMI with
the GUID handle 603E9613-EF25-4338-A3D0-C46177516DB7.
Add a new driver, aliased to the WMAA WMI GUID, to expose a sysfs
backlight class driver to control backlight levels on systems with
EC-driven backlights.
Signed-off-by: Daniel Dadap <ddadap@nvidia.com>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20210903003838.15797-1-ddadap@nvidia.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/Kconfig')
| -rw-r--r-- | drivers/platform/x86/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 1ebce7b775f2..f3dbb0273884 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -91,6 +91,22 @@ config PEAQ_WMI help Say Y here if you want to support WMI-based hotkeys on PEAQ 2-in-1s. +config WMAA_BACKLIGHT_WMI + tristate "ACPI WMAA Backlight Driver" + depends on ACPI_WMI + depends on BACKLIGHT_CLASS_DEVICE + help + This driver provides a sysfs backlight interface for notebook + systems which expose the WMAA ACPI method and an associated WMI + wrapper to drive LCD backlight levels through the Embedded Controller + (EC). + + Say Y or M here if you want to control the backlight on a notebook + system with an EC-driven backlight using the ACPI WMAA method. + + If you choose to compile this driver as a module the module will be + called wmaa-backlight-wmi. + config XIAOMI_WMI tristate "Xiaomi WMI key driver" depends on ACPI_WMI |