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| author |   Andrius Štikonas <andrius@stikonas.eu> | 2019-07-24 20:17:15 +0100 |
|---|---|---|
| committer |   Heiko Stuebner <heiko@sntech.de> | 2019-07-25 22:08:51 +0200 |
| commit | 5882d65c169152178e6fb2fa2e5e3a72fcb08248 (patch) | |
| tree | 0b5e6994d13a838548f30e7561f424e79702f1bc | |
| parent | arm64: dts: rockchip: Specify override mode for kevin panel (diff) | |
| download | linux-dev-5882d65c169152178e6fb2fa2e5e3a72fcb08248.tar.xz linux-dev-5882d65c169152178e6fb2fa2e5e3a72fcb08248.zip | |
arm64: dts: rockchip: Add PWM fan for RockPro64
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>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| -rw-r--r-- | arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts index eb5594062006..076fa0fd103c 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts @@ -58,6 +58,13 @@ }; }; + fan: pwm-fan { + compatible = "pwm-fan"; + #cooling-cells = <2>; + fan-supply = <&vcc12v_dcin>; + pwms = <&pwm1 0 50000 0>; + }; + sdio_pwrseq: sdio-pwrseq { compatible = "mmc-pwrseq-simple"; clocks = <&rk808 1>; @@ -602,6 +609,10 @@ status = "okay"; }; +&pwm1 { + status = "okay"; +}; + &pwm2 { status = "okay"; }; |