Hi Eduardo,

Eduardo Valentin [off-list ref] hat am 2. Februar 2017 um 05:29 geschrieben:


Hello Martin,

...


#include <dt-bindings/thermal/thermal.h>

ocp {
	...
	/*
	 * A simple IC with several bandgap temperature sensors.
	 */
	bandgap0: bandgap@0x0000ED00 {
		...
		#thermal-sensor-cells = <1>;
	};
};

thermal-zones {
	cpu_thermal: cpu-thermal {
		polling-delay-passive = <250>; /* milliseconds */
		polling-delay = <1000>; /* milliseconds */

				/* sensor       ID */
		thermal-sensors = <&bandgap0     0>;

		trips {
			/* each zone within the SoC may have its own trips */
			cpu_alert: cpu-alert {
				temperature = <100000>; /* millicelsius */
				hysteresis = <2000>; /* millicelsius */
				type = "passive";
			};
			cpu_crit: cpu-crit {
				temperature = <125000>; /* millicelsius */
				hysteresis = <2000>; /* millicelsius */
				type = "critical";
			};
		};

		cooling-maps {
			/* each zone within the SoC may have its own cooling */
			...
		};
	};

if i get it right the device tree binding requires also a cooling map. But how should we model this without a fan or a DVFS driver? Is there something like a placeholder? Do you have an example?

Regards
Stefan