[PATCH v4 5/5] arm64: dts: rockchip: Add cooling fan to ROCK 4D

[Nicolas Frattaroli]

The ROCK 4D has a header to connect a small cooling fan. This fan is
driven by one of the SoC's PWM outputs driving a transistor, that in
turn controls the fan's power.

With the introduction of PWM support, add a description of this cooling
fan, as well as the additional trips and cooling-maps for it.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts | 50 +++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
index 899a84b1fbf9..2d5ede010ad0 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
@@ -45,6 +45,14 @@ rfkill {
 		shutdown-gpios = <&gpio2 RK_PD1 GPIO_ACTIVE_HIGH>;
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		cooling-levels = <0 180 205 230 255>;
+		fan-supply = <&vcc_5v0_sys>;
+		pwms = <&pwm2_8ch_5 0 60000 0>;
+		#cooling-cells = <2>;
+	};
+
 	leds: leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -711,6 +719,36 @@ rgmii_phy0: ethernet-phy@1 {
 	};
 };
 
+&package_thermal {
+	polling-delay = <100>;
+
+	trips {
+		package_fan0: package-fan0 {
+			temperature = <50000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+
+		package_fan1: package-fan1 {
+			temperature = <60000>;
+			hysteresis = <2000>;
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map1 {
+			trip = <&package_fan0>;
+			cooling-device = <&fan THERMAL_NO_LIMIT 1>;
+		};
+
+		map2 {
+			trip = <&package_fan1>;
+			cooling-device = <&fan 2 THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &pcie0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie_reset>;
@@ -720,6 +758,13 @@ &pcie0 {
 };
 
 &pinctrl {
+	fan {
+		fan_pwm: fan-pwm {
+			rockchip,pins =
+				<4 RK_PC5 14 &pcfg_pull_down_drv_level_5>;
+		};
+	};
+
 	hym8563 {
 		hym8563_int: hym8563-int {
 			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_up>;
@@ -770,6 +815,11 @@ wifi_en_h: wifi-en-h {
 	};
 };
 
+&pwm2_8ch_5 {
+	pinctrl-0 = <&fan_pwm>;
+	status = "okay";
+};
+
 &sai6 {
 	status = "okay";
 };

-- 
2.53.0