| Message ID | 20190724191715.7668-1-andrius@stikonas.eu (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: dts: rockchip: Add PWM fan for RockPro64 | expand |
Am Mittwoch, 24. Juli 2019, 21:17:15 CEST schrieb Andrius Štikonas: > RockPro64 has a dedicated circuit for driving a 12V fan from PWM1. > > At the moment this makes fan spin at full speed. fancontrol can be used > to control fan speed. E.g. the following config file works well: > > INTERVAL=10 > DEVPATH=hwmon0=devices/platform/pwm-fan > DEVNAME=hwmon0=pwmfan > FCTEMPS=hwmon0/device/pwm1=../thermal/thermal_zone0/temp > MINTEMP=hwmon0/device/pwm1=40 > MAXTEMP=hwmon0/device/pwm1=60 > MINSTART=hwmon0/device/pwm1=100 > MINSTOP=hwmon0/device/pwm1=70 > > In the future it would be nice to define trip points in dts file, > so that kernel could adjust fan speed itself. patches welcome ;-) > Signed-off-by: Andrius Štikonas <andrius@stikonas.eu> applied for 5.4 Thanks Heiko
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts index eb5594062006..02cf5d0dbaed 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts @@ -169,6 +169,14 @@ regulator-max-microvolt = <1400000>; vin-supply = <&vcc5v0_sys>; }; + + fan: pwm-fan { + compatible = "pwm-fan"; + #cooling-cells = <2>; + fan-supply = <&vcc12v_dcin>; + pwms = <&pwm1 0 50000 0>; + }; + }; &cpu_l0 { @@ -602,6 +610,10 @@ status = "okay"; }; +&pwm1 { + status = "okay"; +}; + &pwm2 { status = "okay"; };
RockPro64 has a dedicated circuit for driving a 12V fan from PWM1. At the moment this makes fan spin at full speed. fancontrol can be used to control fan speed. E.g. the following config file works well: INTERVAL=10 DEVPATH=hwmon0=devices/platform/pwm-fan DEVNAME=hwmon0=pwmfan FCTEMPS=hwmon0/device/pwm1=../thermal/thermal_zone0/temp MINTEMP=hwmon0/device/pwm1=40 MAXTEMP=hwmon0/device/pwm1=60 MINSTART=hwmon0/device/pwm1=100 MINSTOP=hwmon0/device/pwm1=70 In the future it would be nice to define trip points in dts file, so that kernel could adjust fan speed itself. Signed-off-by: Andrius Štikonas <andrius@stikonas.eu> --- arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts | 12 ++++++++++++ 1 file changed, 12 insertions(+)