On 06/06/2024 11:06, Christian Hewitt wrote:
The A311D on Zero2 needs active cooling and the board includes a header to
connect a simple fan. Add pwm-fan support with basic thermal properties so
the fan runs when connected.
Suggested-by: Yuntian Zhang <yt@xxxxxxxxx>
Signed-off-by: Christian Hewitt <christianshewitt@xxxxxxxxx>
---
Changes since v1: [0]
- Drop min/max state to comply with bindings
- Drop ddr_thermal node
- Add cpu_thermal trips
- Use cooling map2 to avoid clashing with dtsi inherited maps
[0] https://patchwork.kernel.org/project/linux-amlogic/patch/20231028075445.3515664-1-christianshewitt@xxxxxxxxx/
.../dts/amlogic/meson-g12b-radxa-zero2.dts | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts
index 890f5bfebb03..8445701100d0 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts
@@ -33,6 +33,13 @@ memory@0 {
reg = <0x0 0x0 0x0 0x80000000>;
};
+ fan0: pwm-fan {
+ compatible = "pwm-fan";
+ #cooling-cells = <2>;
+ cooling-levels = <0 64 128 192 255>;
+ pwms = <&pwm_AO_ab 0 40000 0>;
+ };
+
gpio-keys-polled {
compatible = "gpio-keys-polled";
poll-interval = <100>;
@@ -286,6 +293,23 @@ &cpu103 {
clock-latency = <50000>;
};
+&cpu_thermal {
+ trips {
+ cpu_active: cpu-active {
+ temperature = <70000>; /* millicelsius */
+ hysteresis = <2000>; /* millicelsius */
+ type = "active";
+ };
+ };
+
+ cooling-maps {
+ map2 {
+ trip = <&cpu_active>;
+ cooling-device = <&fan0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ };
+};
+
&frddr_a {
status = "okay";
};
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
