diff options
Diffstat (limited to 'Documentation/devicetree/bindings/hwmon/pwm-fan.txt')
-rw-r--r-- | Documentation/devicetree/bindings/hwmon/pwm-fan.txt | 58 |
1 files changed, 1 insertions, 57 deletions
diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 41b76762953a..48886f0ce415 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -1,57 +1 @@ -Bindings for a fan connected to the PWM lines - -Required properties: -- compatible : "pwm-fan" -- pwms : the PWM that is used to control the PWM fan -- cooling-levels : PWM duty cycle values in a range from 0 to 255 - which correspond to thermal cooling states - -Optional properties: -- fan-supply : phandle to the regulator that provides power to the fan -- interrupts : This contains a single interrupt specifier which - describes the tachometer output of the fan as an - interrupt source. The output signal must generate a - defined number of interrupts per fan revolution, which - require that it must be self resetting edge interrupts. - See interrupt-controller/interrupts.txt for the format. -- pulses-per-revolution : define the tachometer pulses per fan revolution as - an integer (default is 2 interrupts per revolution). - The value must be greater than zero. - -Example: - fan0: pwm-fan { - compatible = "pwm-fan"; - #cooling-cells = <2>; - pwms = <&pwm 0 10000 0>; - cooling-levels = <0 102 170 230>; - }; - - thermal-zones { - cpu_thermal: cpu-thermal { - thermal-sensors = <&tmu 0>; - polling-delay-passive = <0>; - polling-delay = <0>; - trips { - cpu_alert1: cpu-alert1 { - temperature = <100000>; /* millicelsius */ - hysteresis = <2000>; /* millicelsius */ - type = "passive"; - }; - }; - cooling-maps { - map0 { - trip = <&cpu_alert1>; - cooling-device = <&fan0 0 1>; - }; - }; - }; - -Example 2: - fan0: pwm-fan { - compatible = "pwm-fan"; - pwms = <&pwm 0 40000 0>; - fan-supply = <®_fan>; - interrupt-parent = <&gpio5>; - interrupts = <1 IRQ_TYPE_EDGE_FALLING>; - pulses-per-revolution = <2>; - }; +This file has moved to pwm-fan.yaml. |