linux/arch/arm/boot/dts/omap4-cpu-thermal.dtsi
Nishanth Menon d723cfeafc ARM: dts: am57xx-beagle-x15: Add thermal map to include fan and tmp102
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>
2015-03-26 12:02:12 -07:00

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/*
* 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>;
};
};
};