mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
d723cfeafc
BeagleBoard-X15 has capability for a fan and has an onboard TMP102 temperature sensor as well. This allows us to create a new thermal zone (called, un-imaginatively "board"), and allows us to use some active cooling as temperatures start edge upward in the system by creating a new alert temperature (emperically 50C) for cpu. NOTE: Fan is NOT mounted by default on the platform, in such a case, all we end up doing is switch on a regulator and leak very minimal current. Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
41 lines
1.2 KiB
Text
41 lines
1.2 KiB
Text
/*
|
|
* Device Tree Source for OMAP4/5 SoC CPU thermal
|
|
*
|
|
* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Contact: Eduardo Valentin <eduardo.valentin@ti.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public License
|
|
* version 2. This program is licensed "as is" without any warranty of any
|
|
* kind, whether express or implied.
|
|
*/
|
|
|
|
#include <dt-bindings/thermal/thermal.h>
|
|
|
|
cpu_thermal: cpu_thermal {
|
|
polling-delay-passive = <250>; /* milliseconds */
|
|
polling-delay = <1000>; /* milliseconds */
|
|
|
|
/* sensor ID */
|
|
thermal-sensors = <&bandgap 0>;
|
|
|
|
cpu_trips: trips {
|
|
cpu_alert0: cpu_alert {
|
|
temperature = <100000>; /* millicelsius */
|
|
hysteresis = <2000>; /* millicelsius */
|
|
type = "passive";
|
|
};
|
|
cpu_crit: cpu_crit {
|
|
temperature = <125000>; /* millicelsius */
|
|
hysteresis = <2000>; /* millicelsius */
|
|
type = "critical";
|
|
};
|
|
};
|
|
|
|
cpu_cooling_maps: cooling-maps {
|
|
map0 {
|
|
trip = <&cpu_alert0>;
|
|
cooling-device =
|
|
<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
|
|
};
|
|
};
|
|
};
|