linux-kernel - Re: [PATCH v2 2/3] arm64: dts: imx8mq: Add the buck vdd

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Date:   Thu, 28 Feb 2019 14:29:16 +0000
From:   Abel Vesa <abel.vesa@....com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     Rob Herring <robh@...nel.org>, Mark Rutland <mark.rutland@....com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Lucas Stach <l.stach@...gutronix.de>,
        Angus Ainslie <angus.ainslie@...i.sm>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Anson Huang <anson.huang@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        Fabio Estevam <fabio.estevam@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/3] arm64: dts: imx8mq: Add the buck vdd_arm regulator

On 19-02-28 22:15:46, Shawn Guo wrote:
> 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@....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.
> 

Will do.

> > +		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?
> 

Will remove it.

> 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@...ts.infradead.org
> > https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.infradead.org%2Fmailman%2Flistinfo%2Flinux-arm-kernel&amp;data=02%7C01%7Cabel.vesa%40nxp.com%7C7f571130a0114fb84fe408d69d87606f%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C636869602101094479&amp;sdata=vsNlfbgqglUuVsFyULjTMm5Hqwd6chpsVa0V05ugDG0%3D&amp;reserved=0