| commit | 26e8b4b56e9d6f8ced25de62f3de9f3b21584c32 | |
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | |
| Sat, 7 Jul 2007 01:37:57 +0000 (6 22:37 -0300) | ||
| committer | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | |
| Sun, 9 Sep 2007 02:15:12 +0000 (8 23:15 -0300) | ||
| tree | 145dd2e45c7e059c588eb666c8293c63cc0a159d | treesnapshot (tar.gz zip) |
| parent | 1c72495385e34eb31bb6ee06564e7f080f2be695 | commitdiff |
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>
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>
| Documentation/thinkpad-acpi.txt | diffblobblamehistory | |
| drivers/misc/Kconfig | diffblobblamehistory | |
| drivers/misc/thinkpad_acpi.c | diffblobblamehistory | |
| drivers/misc/thinkpad_acpi.h | diffblobblamehistory |