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authorRafał Miłecki <rafal@milecki.pl>2017-04-03 17:48:28 +0200
committerEduardo Valentin <edubezval@gmail.com>2017-04-06 21:33:08 -0700
commitee7cdbecb128d8b023c5439004cdea8baa2d0fe4 (patch)
treec2bf32338bef98874223963bf30768e058a1fd19 /Documentation/devicetree/bindings/thermal
parentbcb7dd9ef206f7d646ed8dac6fe7772083714253 (diff)
dt-bindings: thermal: add support for Broadcom's Northstar thermal
This commit documents binding for thermal used in Northstar family SoCs. There isn't any known Northstar device with active cooling system so DT example has empty cooling-maps node. There is also no support for CPU frequency throttling so I put only a critical trip in the example. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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+* Broadcom Northstar Thermal
+
+This binding describes thermal sensor that is part of Northstar's DMU (Device
+Management Unit).
+
+Required properties:
+- compatible : Must be "brcm,ns-thermal"
+- reg : iomem address range of PVTMON registers
+- #thermal-sensor-cells : Should be <0>
+
+Example:
+
+thermal: thermal@1800c2c0 {
+ compatible = "brcm,ns-thermal";
+ reg = <0x1800c2c0 0x10>;
+ #thermal-sensor-cells = <0>;
+};
+
+thermal-zones {
+ cpu_thermal: cpu-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <1000>;
+ coefficients = <(-556) 418000>;
+ thermal-sensors = <&thermal>;
+
+ trips {
+ cpu-crit {
+ temperature = <125000>;
+ hysteresis = <0>;
+ type = "critical";
+ };
+ };
+
+ cooling-maps {
+ };
+ };
+};