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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-04-24 18:48:16 +0400
committerLen Brown <len.brown@intel.com>2007-04-25 10:00:27 +0400
commit2c37aa4e22dd55070c608290c5031f2ee93e69ce (patch)
treeab8a0c05c4a3e51e6f111d3377393b766d4e39a2 /Documentation/ABI
parent40ca9fdf8aa7d929e2b8939be1e6380d107381e1 (diff)
downloadlinux-2c37aa4e22dd55070c608290c5031f2ee93e69ce.tar.xz
ACPI: thinkpad-acpi: add sysfs support to the thermal subdriver
Export thinkpad thermal sensors to sysfs, following the hwmon specification for thermal monitoring sensors. ThinkPad thermal monitoring is done by the EC. Sensors can show up or disappear at runtime when they are inside hotswappable hardware, such as batteries. Sensors that are not available return -ENXIO when accessed. Up to 16 thermal sensors are supported on new firmware (but nobody has reported a ThinkPad with more than 12 sensors so far), and 8 sensors are supported on older firmware. Thermal sensor mapping is model-specific. Precision varies, it is 1 degree Celcius on new ThinkPads, but higher on some older models. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
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