tree 8a9ba42e5a4d4ff208297cd18782aa85fef27164
parent 2c37aa4e22dd55070c608290c5031f2ee93e69ce
author Henrique de Moraes Holschuh <hmh@hmh.eng.br> 1177426097 -0300
committer Len Brown <len.brown@intel.com> 1177480827 -0400

ACPI: thinkpad-acpi: add sysfs support to fan subdriver

Export sysfs attributes to monitor and control the internal thinkpad fan
(some thinkpads have more than one fan, but thinkpad-acpi doesn't support
the second fan yet).  The sysfs interface follows the hwmon design guide
for fan devices.

Also, fix some stray "thermal" files in the fan procfs description that
have been there forever, and officially support "full-speed" as the name
for the PWM-disabled state of the fan controller to keep it in line with
the hwmon interface.  It is much better a name for that mode than the
unobvious "disengaged" anyway.  Change the procfs interface to also accept
full-speed as a fan level, but still report it as disengaged for backwards
compatibility.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>