[PATCH v3 4/4] arm64: dts: mt7986: add pwm-fan and cooling-maps to BPI-R3 dts

[Frank Wunderlich <linux@fw-web.de>]

From: Daniel Golle <daniel@makrotopia.org>

Add pwm-fan and cooling-maps to BananaPi-R3 devicetree.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
this is based on Patch from openwrt. as my PWM-fan seems to need 5v pwm
signal and r3 only provides 3v3 on 3pin-socket it does not work for me.
---
 .../dts/mediatek/mt7986a-bananapi-bpi-r3.dts  | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
index 782519429497..29c018bbf29d 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
@@ -37,6 +37,15 @@ dcin: regulator-12vd {
 		regulator-always-on;
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		#cooling-cells = <2>;
+		/* cooling level (0, 1, 2) - pwm inverted */
+		cooling-levels = <255 96 0>;
+		pwms = <&pwm 0 10000 0>;
+		status = "okay";
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -132,6 +141,28 @@ sfp2: sfp-2 {
 	};
 };
 
+&cpu_thermal {
+	cooling-maps {
+		cpu-active-high {
+			/* active: set fan to cooling level 2 */
+			cooling-device = <&fan 2 2>;
+			trip = <&cpu_trip_active_high>;
+		};
+
+		cpu-active-low {
+			/* active: set fan to cooling level 1 */
+			cooling-device = <&fan 1 1>;
+			trip = <&cpu_trip_active_low>;
+		};
+
+		cpu-passive {
+			/* passive: set fan to cooling level 0 */
+			cooling-device = <&fan 0 0>;
+			trip = <&cpu_trip_passive>;
+		};
+	};
+};
+
 &crypto {
 	status = "okay";
 };
-- 
2.34.1