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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2007-07-18 23:45:43 -0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-07-21 23:49:03 -0400 |
| commit | 24d3b77467b6aaf59e38dce4aa86d05541858195 (patch) | |
| tree | 92975c9c2d4b37922d25782bd02d7076d77e817e /drivers/misc/Kconfig | |
| parent | d5a2f2f1d68e2da538ac28540cddd9ccc733b001 (diff) | |
| download | op-kernel-dev-24d3b77467b6aaf59e38dce4aa86d05541858195.zip op-kernel-dev-24d3b77467b6aaf59e38dce4aa86d05541858195.tar.gz | |
ACPI: thinkpad-acpi: allow use of CMOS NVRAM for brightness control
It appears that Lenovo decided to break the EC brightness control interface
in a weird way in their latest BIOSes. Fortunately, the old CMOS NVRAM
interface works just fine in such BIOSes.
Add a module parameter that allows the user to select which strategy to use
for brightness control: EC, NVRAM, or both. By default, do both (which is
the way thinkpad-acpi used to work until now) on IBM ThinkPads, and use
NVRAM only on Lenovo ThinkPads.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc/Kconfig')
| -rw-r--r-- | drivers/misc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 5197f9b..aaaa61e 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -150,6 +150,7 @@ config THINKPAD_ACPI depends on X86 && ACPI select BACKLIGHT_CLASS_DEVICE select HWMON + select NVRAM ---help--- This is a driver for the IBM and Lenovo ThinkPad laptops. It adds support for Fn-Fx key combinations, Bluetooth control, video |
