From 6d2520783035c6ec16c8580f319276e2bb427bee Mon Sep 17 00:00:00 2001 From: Vicente Bergas Date: Sun, 30 Sep 2018 17:50:33 +0200 Subject: [PATCH] arm64: dts: rockchip: add fan on rk3399-sapphire board 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 Signed-off-by: Heiko Stuebner --- .../boot/dts/rockchip/rk3399-sapphire.dtsi | 38 +++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi index 5421e23760c3..90d813bdabde 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi @@ -66,6 +66,19 @@ dc_12v: dc-12v { 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_b1 { 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 @@ pwr_btn: pwr-btn { }; }; + fan { + motor_pwr: motor-pwr { + rockchip,pins = + ; + }; + }; + pmic { pmic_int_l: pmic-int-l { rockchip,pins = -- 2.45.2