arm64: dts: rockchip: add fan on rk3399-sapphire board (6d252078) · Commits · 戴 / test

The Sapphire board has a 12V fan. So, adding it to the DTS. There is no power supply directly connected, it needs the baseboard to work. If the board is used standalone then a hardware modification is needed. On the Sapphire board there is an unpopulated resistor to connect it to VBUS_TYPEC, which is usually 5V (too low) and can range up to 20V (too high). I tested it for a week connected to VCC_SYS which is 8.4V and proved to be more than enough for the required cooling needs. This is the connection described in the comment. Signed-off-by:

Vicente Bergas <vicencb@gmail.com> Signed-off-by:

Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi

+38 −0

Original line number	Diff line number	Diff line
		@@ -66,6 +66,19 @@
		regulator-max-microvolt = <12000000>;
		};

		/*
		* The fan power supply comes from the baseboard.
		* For the standalone Sapphire one option is to connect a wire
		* from R90030 DNP R0805 pin2 to C90002 10uF C0805 pin1 (vcc_sys).
		*/
		fan0: gpio-fan {
		#cooling-cells = <2>;
		compatible = "gpio-fan";
		gpio-fan,speed-map = <0 0 3000 1>;
		gpios = <&gpio1 RK_PC2 GPIO_ACTIVE_HIGH>;
		status = "okay";
		};

		keys: gpio-keys {
		compatible = "gpio-keys";
		autorepeat;
		@@ -183,6 +196,24 @@
		cpu-supply = <&vdd_cpu_b>;
		};

		&cpu_thermal {
		trips {
		cpu_hot: cpu_hot {
		hysteresis = <10000>;
		temperature = <55000>;
		type = "active";
		};
		};

		cooling-maps {
		map2 {
		cooling-device =
		<&fan0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
		trip = <&cpu_hot>;
		};
		};
		};

		&emmc_phy {
		status = "okay";
		};
		@@ -472,6 +503,13 @@
		};
		};

		fan {
		motor_pwr: motor-pwr {
		rockchip,pins =
		<RK_GPIO1 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
		};
		};

		pmic {
		pmic_int_l: pmic-int-l {
		rockchip,pins =

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