Hi Peter,
On 2021-07-30 15:02, Peter Geis wrote:
The rockpro64 had a fan node since
commit 5882d65c1691 ("arm64: dts: rockchip: Add PWM fan for RockPro64")
however it was never tied into the thermal driver for automatic control.
Add the links to the thermal node to permit the kernel to handle this
automatically.
Borrowed from the (rk3399-khadas-edge.dtsi).
Signed-off-by: Peter Geis <pgwipeout@xxxxxxxxx>
---
Changelog:
v2:
Adjusted fan setpoints for less noise
.../boot/dts/rockchip/rk3399-rockpro64.dtsi | 57 +++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
index 6bff8db7d33e..0d79e6ae1c3a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
@@ -69,6 +69,7 @@ diy_led: led-1 {
fan: pwm-fan {
compatible = "pwm-fan";
+ cooling-levels = <0 100 150 200 255>;
#cooling-cells = <2>;
fan-supply = <&vcc12v_dcin>;
pwms = <&pwm1 0 50000 0>;
@@ -245,6 +246,34 @@ &cpu_b1 {
cpu-supply = <&vdd_cpu_b>;
};
+&cpu_thermal {
+ trips {
+ cpu_warm: cpu_warm {
+ temperature = <55000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
(Heh, it still tickles me to see these points I arbitrarily made up
being faithfully copied around - I guess that means I got them right!)
+
+ cpu_hot: cpu_hot {
+ temperature = <65000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+ };
+
+ cooling-maps {
+ map2 {
+ trip = <&cpu_warm>;
+ cooling-device = <&fan THERMAL_NO_LIMIT 1>;
+ };
+
+ map3 {
+ trip = <&cpu_hot>;
+ cooling-device = <&fan 2 THERMAL_NO_LIMIT>;
+ };
+ };
+};
+
&emmc_phy {
status = "okay";
};
@@ -281,6 +310,34 @@ &gpu {
status = "okay";
};
+&gpu_thermal {
+ trips {
+ gpu_warm: gpu_warm {
+ temperature = <55000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+
+ gpu_hot: gpu_hot {
+ temperature = <65000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+ };
+
+ cooling-maps {
+ map1 {
+ trip = <&gpu_warm>;
+ cooling-device = <&fan THERMAL_NO_LIMIT 1>;
+ };
+
+ map2 {
+ trip = <&gpu_hot>;
+ cooling-device = <&fan 2 THERMAL_NO_LIMIT>;
+ };
+ };
+};
Unless something's changed since commit a793e19c15f2 ("arm64: dts:
rockchip: Fix NanoPC-T4 cooling maps"), multiple cooling maps don't
actually share a singe cooling device properly[1]. The Khadas Edge DT
dates from right around the same time so I guess it crossed over with
that discussion and never got fixed.
In hindsight, I do seem to remember my fan being a bit more jumpy around
the trip points than it is today, which may well have been the two maps
fighting each other...
Robin.
[1]
https://lore.kernel.org/linux-rockchip/55b9018e-672e-522b-d0a0-c5655be0f353@xxxxxxxxxx/
+
&i2c0 {
clock-frequency = <400000>;
i2c-scl-rising-time-ns = <168>;
