On Sun, Jul 23, 2017 at 6:27 PM, Icenowy Zheng <icenowy@xxxxxxx> wrote:
> Orange Pi Zero board has a SY8113B regulator, which is controlled via
> GPIO and capable of outputing 1.1V when the PL6 GPIO is set to output 0
> or 1.3V when the PL6 GPIO is set to input or output 1, and the output is
> the power supply of the ARM cores in H2+ SoC.
>
> Add the device tree node of this regulator and set the cpu's cpu-supply
> property to it.
>
> Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
> ---
> arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
> index 6713d0f2b3f4..28b4433bd7f7 100644
> --- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
> +++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
> @@ -94,6 +94,27 @@
> reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>;
> post-power-on-delay-ms = <200>;
> };
> +
> + reg_sy8113b: gpio-regulator {
> + compatible = "regulator-gpio";
> +
No need for the newline.
> + regulator-name = "vdd-cpux";
> + regulator-type = "voltage";
> + regulator-boot-on;
> + regulator-always-on;
> + regulator-min-microvolt = <1100000>;
> + regulator-max-microvolt = <1300000>;
> + regulator-ramp-delay = <50>; /* 4ms */
You should also add "enable-active-high". The driver might not
honor the GPIO_ACTIVE_HIGH flag. AFAIK this was a problem with
the old GPIO API.
ChenYu
> +
> + gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
> + gpios-states = <0x1>;
> + states = <1100000 0x0
> + 1300000 0x1>;
> + };
> +};
> +
> +&cpu0 {
> + cpu-supply = <®_sy8113b>;
> };
>
> &ehci0 {
> --
> 2.13.0
>
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