arm64: dts: make pwm-fan work on r4

add new fan speed setting to fix bind error because of zero-index cooling-points. [ 5.080681] thermal_sys: Failed to bind 'cpu-thermal' with 'pwm-fan': -22 Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
frank-w · Sep 23, 2024 · 7e14cc4 · 7e14cc4
1 parent d309754
commit 7e14cc4
Show file tree

Hide file tree

Showing 2 changed files with 11 additions and 2 deletions.
diff --git a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts
@@ -318,6 +318,15 @@
 	status = "okay";
 };
 
+&pwm {
+	status = "okay";
+};
+
+&fan {
+	pwms = <&pwm 0 50000>;
+	status = "okay";
+};
+
 &ssusb1 {
 	status = "okay";
 };

diff --git a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
@@ -121,8 +121,8 @@
 
 	fan: pwm-fan {
 		compatible = "pwm-fan";
-		/* cooling level (0, 1, 2) : (0% duty, 50% duty, 100% duty) */
-		cooling-levels = <0 128 255>;
+		/* cooling level (0, 1, 2, 3) : (0% duty, 30% duty, 50% duty, 100% duty) */
+		cooling-levels = <0 80 128 255>;
 		#cooling-cells = <2>;
 		#thermal-sensor-cells = <1>;
 		status = "disabled";