diff options
| author | Michal Wilczynski <m.wilczynski@samsung.com> | 2025-10-16 15:38:07 +0200 |
|---|---|---|
| committer | Drew Fustini <fustini@kernel.org> | 2025-10-28 09:38:44 +0000 |
| commit | a9fb9c7e3bcd3107605e300680b95ad9615b3500 (patch) | |
| tree | ab77d6763f6e0beee283bc130a944e41a4365650 | |
| parent | b6b00b220d2a052b2bec8ee7ccaf2679faef8558 (diff) | |
riscv: dts: thead: Add PWM fan and thermal control
Add Device Tree nodes to enable a PWM controlled fan and it's associated
thermal management for the Lichee Pi 4A board.
This enables temperature-controlled active cooling for the Lichee Pi 4A
board based on SoC temperature.
Reviewed-by: Drew Fustini <fustini@kernel.org>
Tested-by: Drew Fustini <fustini@kernel.org>
Reviewed-by: Elle Rhumsaa <elle@weathered-steel.dev>
Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
Signed-off-by: Drew Fustini <fustini@kernel.org>
| -rw-r--r-- | arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts index 4020c727f09e..c58c2085ca92 100644 --- a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts +++ b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts @@ -28,9 +28,76 @@ chosen { stdout-path = "serial0:115200n8"; }; + + thermal-zones { + cpu-thermal { + polling-delay = <1000>; + polling-delay-passive = <1000>; + thermal-sensors = <&pvt 0>; + + trips { + fan_config0: fan-trip0 { + temperature = <39000>; + hysteresis = <5000>; + type = "active"; + }; + + fan_config1: fan-trip1 { + temperature = <50000>; + hysteresis = <5000>; + type = "active"; + }; + + fan_config2: fan-trip2 { + temperature = <60000>; + hysteresis = <5000>; + type = "active"; + }; + }; + + cooling-maps { + map-active-0 { + cooling-device = <&fan 1 1>; + trip = <&fan_config0>; + }; + + map-active-1 { + cooling-device = <&fan 2 2>; + trip = <&fan_config1>; + }; + + map-active-2 { + cooling-device = <&fan 3 3>; + trip = <&fan_config2>; + }; + }; + }; + }; + + fan: pwm-fan { + pinctrl-names = "default"; + pinctrl-0 = <&fan_pins>; + compatible = "pwm-fan"; + #cooling-cells = <2>; + pwms = <&pwm 1 10000000 0>; + cooling-levels = <0 66 196 255>; + }; + }; &padctrl0_apsys { + fan_pins: fan-0 { + pwm1-pins { + pins = "GPIO3_3"; /* PWM1 */ + function = "pwm"; + bias-disable; + drive-strength = <25>; + input-disable; + input-schmitt-disable; + slew-rate = <0>; + }; + }; + uart0_pins: uart0-0 { tx-pins { pins = "UART0_TXD"; |