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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2009-06-18 00:40:16 -0300
committerLen Brown <len.brown@intel.com>2009-06-18 01:30:35 -0400
commitd7880f10c5d42ba182a97c1fd41d41d0b8837097 (patch)
tree56c7b64874b841d925467995dccf915545cde69e /arch/x86/include/asm/setup.h
parent8bf3d4c535c2b9689c2979b281c24e9f59c2f4ad (diff)
thinkpad-acpi: forbid the use of HBRV on Lenovo ThinkPads
Forcing thinkpad-acpi to do EC-based brightness control (HBRV) on a X61 has very... interesting effects, instead of doing nothing (since it doesn't have EC-based backlight control), it causes "weirdness" in the fan tachometer readings, for example. This means the EC register that used to be HBRV has been reused by Lenovo for something else, but they didn't remove it from the DSDT. Make sure the documentation reflects this data, and forbid the user from forcing the driver to access HBRV 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 'arch/x86/include/asm/setup.h')
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