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SubjectRe: [PATCH v2 2/3] arm64: dts: imx8mq: Add the buck vdd_arm regulator
On Fri, Feb 15, 2019 at 06:07:23PM +0000, Abel Vesa wrote:
> According to the schematics, this is a MP2147 switch converter
> which is controlled by GPIO1_IO13. When set the gpio is set to
> high the regulator output is set to 0.9V. When the gpio is set
> to low the regulator output is set to 1V.
>
> Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
> ---
> arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 36 ++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> index 54737bf..e5da3dd 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> @@ -31,6 +31,35 @@
> gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
> enable-active-high;
> };
> +
> + buck2_reg: buck2 {

Please follow regulator-xxx naming convention.

> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_buck2>;
> + compatible = "regulator-gpio";
> + regulator-name = "vdd_arm";
> + regulator-min-microvolt = <900000>;
> + regulator-max-microvolt = <1000000>;
> + gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
> + states = <1000000 0x0
> + 900000 0x1>;
> + enable-active-high;

The property only makes sense when enable-gpio is present?

Shawn

> + };
> +};
> +
> +&A53_0 {
> + cpu-supply = <&buck2_reg>;
> +};
> +
> +&A53_1 {
> + cpu-supply = <&buck2_reg>;
> +};
> +
> +&A53_2 {
> + cpu-supply = <&buck2_reg>;
> +};
> +
> +&A53_3 {
> + cpu-supply = <&buck2_reg>;
> };
>
> &fec1 {
> @@ -203,6 +232,13 @@
> };
>
> &iomuxc {
> + pinctrl_buck2: vddarmgrp {
> + fsl,pins = <
> + MX8MQ_IOMUXC_GPIO1_IO13_GPIO1_IO13 0x19
> + >;
> +
> + };
> +
> pinctrl_fec1: fec1grp {
> fsl,pins = <
> MX8MQ_IOMUXC_ENET_MDC_ENET1_MDC 0x3
> --
> 2.7.4
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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