On Sun, Sep 30, 2018 at 5:50 PM Vicente Bergas <vicencb@xxxxxxxxx> wrote:
>
> 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@xxxxxxxxx>
> ---
> .../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 @@
> 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 =
> --
> 2.19.0
Hi,
can i kindly ask for feedback on this proposed patch?
Regards,
Vicenç.
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