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| author | Patrick Rudolph <siro@das-labor.org> | 2017-08-27 17:46:52 +0200 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2017-11-04 19:10:29 +0000 |
| commit | 0709dc0468951e2ed8fa8bac96d919147a926b74 (patch) | |
| tree | 53ab51a8c2d897a93179f8913d1200fbba9329e7 /util/showdevicetree/showdt.c | |
| parent | 3ab13a8691cbe0e96c0741cb9bdf0e0acfa6efaf (diff) | |
ec/lenovo/h8/acpi/thermal: Add ACPI fan control
Disengage the fan 10 degree below passive threshold as the automatic EC fan
control does not disengage the FAN even when CPU starts melting ...
* Add EC registers FAND and FANA.
* Add ACPI methods _AC0 and _AL0.
* Add fan device and PowerResource for fan control.
Tested on Lenovo T430:
* The fan disengages at 80°C and keeps running at full speed until temperature
drops below 80°C.
* Fan can be disengaged using sysfs:
/sys/devics/virtual/thermal/cooling_device0/cur_state
Tested on Lenovo T500:
* The fan disengages at 80°C and keeps running at full speed until temperature
drops below 80°C.
* Fan cannot be disengaged using sysfs, but the current state can be read:
/sys/devics/virtual/thermal/cooling_device0/cur_state
Change-Id: I075ff5c69676927db1c5e731294e18796884f97e
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/21227
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'util/showdevicetree/showdt.c')
0 files changed, 0 insertions, 0 deletions