diff options
| author | Vicente Bergas <vicencb@gmail.com> | 2018-09-30 18:50:33 +0300 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2018-11-05 10:40:51 +0300 |
| commit | 6d2520783035c6ec16c8580f319276e2bb427bee (patch) | |
| tree | ab86772196fc398f343d3dad20cc2dbb752202df /arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi | |
| parent | b0fe0f47be46096cb0edf38d015c6b0a4472c7ae (diff) | |
| download | linux-6d2520783035c6ec16c8580f319276e2bb427bee.tar.xz | |
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 <vicencb@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi')
| -rw-r--r-- | arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi | 38 |
1 files changed, 38 insertions, 0 deletions
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 @@ 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 = |