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authorNishanth Menon <nm@ti.com>2015-03-23 14:39:39 -0500
committerTony Lindgren <tony@atomide.com>2015-03-26 12:02:12 -0700
commitd723cfeafc7b4c73e89ed3d4b1a4d747e990872c (patch)
treec46ac09bac9f252764ffc5ec233c9b7e0ea3588c /arch/arm/boot/dts/am57xx-beagle-x15.dts
parentf7397edf47ecc859fa69c15c4f9cefc8f2ee00c8 (diff)
downloadlinux-linaro-stable-d723cfeafc7b4c73e89ed3d4b1a4d747e990872c.tar.gz
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>
Diffstat (limited to 'arch/arm/boot/dts/am57xx-beagle-x15.dts')
-rw-r--r--arch/arm/boot/dts/am57xx-beagle-x15.dts49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/am57xx-beagle-x15.dts b/arch/arm/boot/dts/am57xx-beagle-x15.dts
index 03750af3b49a..ae83a812d8a6 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15.dts
@@ -87,6 +87,7 @@
gpios = <&tps659038_gpio 1 GPIO_ACTIVE_HIGH>;
gpio-fan,speed-map = <0 0>,
<13000 1>;
+ #cooling-cells = <2>;
};
extcon_usb1: extcon_usb1 {
@@ -442,6 +443,7 @@
pinctrl-0 = <&tmp102_pins_default>;
interrupt-parent = <&gpio7>;
interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+ #thermal-sensor-cells = <1>;
};
};
@@ -560,3 +562,50 @@
&usb2 {
dr_mode = "peripheral";
};
+
+&cpu_trips {
+ cpu_alert1: cpu_alert1 {
+ temperature = <50000>; /* millicelsius */
+ hysteresis = <2000>; /* millicelsius */
+ type = "active";
+ };
+};
+
+&cpu_cooling_maps {
+ map1 {
+ trip = <&cpu_alert1>;
+ cooling-device = <&gpio_fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+};
+
+&thermal_zones {
+ board_thermal: board_thermal {
+ polling-delay-passive = <1250>; /* milliseconds */
+ polling-delay = <1500>; /* milliseconds */
+
+ /* sensor ID */
+ thermal-sensors = <&tmp102 0>;
+
+ board_trips: trips {
+ board_alert0: board_alert {
+ temperature = <40000>; /* millicelsius */
+ hysteresis = <2000>; /* millicelsius */
+ type = "active";
+ };
+
+ board_crit: board_crit {
+ temperature = <105000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+
+ board_cooling_maps: cooling-maps {
+ map0 {
+ trip = <&board_alert0>;
+ cooling-device =
+ <&gpio_fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ };
+ };
+};