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 <[email protected]> --- arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 35 ++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts index 54737bf..afea110 100644 --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts @@ -31,6 +31,34 @@ gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>; enable-active-high; }; + + buck2_reg: regulator-buck2 { + 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>; + }; +}; + +&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 +231,13 @@ }; &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
