linux-kernel - Re: [PATCH v1 10/12] arm64: dts: librem5-devkit: configure VSELECT

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Date:   Mon, 17 Feb 2020 12:09:43 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Martin Kepplinger <martin.kepplinger@...i.sm>
Cc:     robh@...nel.org, mark.rutland@....com, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        Anson.Huang@....com, devicetree@...r.kernel.org, kernel@...i.sm,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Angus Ainslie (Purism)" <angus@...ea.ca>
Subject: Re: [PATCH v1 10/12] arm64: dts: librem5-devkit: configure VSELECT

On Wed, Feb 05, 2020 at 03:30:01PM +0100, Martin Kepplinger wrote:
> From: "Angus Ainslie (Purism)" <angus@...ea.ca>
> 
> use vselect to set the io voltage to 1.8V
> 
> Signed-off-by: Angus Ainslie (Purism) <angus@...ea.ca>
> ---
>  arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
> index fbc7062c4633..8f920c554ebd 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
> @@ -789,6 +789,7 @@
>  			MX8MQ_IOMUXC_SD2_DATA1_USDHC2_DATA1	0xc3
>  			MX8MQ_IOMUXC_SD2_DATA2_USDHC2_DATA2	0xc3
>  			MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3	0xc3
> +			MX8MQ_IOMUXC_GPIO1_IO04_GPIO1_IO4	0xc1

How is the pin working without a pinctrl handle pointing it?

Shawn

>  		>;
>  	};
>  
> @@ -800,6 +801,7 @@
>  			MX8MQ_IOMUXC_SD2_DATA1_USDHC2_DATA1	0xcd
>  			MX8MQ_IOMUXC_SD2_DATA2_USDHC2_DATA2	0xcd
>  			MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3	0xcd
> +			MX8MQ_IOMUXC_GPIO1_IO04_GPIO1_IO4	0xc1
>  		>;
>  	};
>  
> @@ -811,6 +813,7 @@
>  			MX8MQ_IOMUXC_SD2_DATA1_USDHC2_DATA1	0xcf
>  			MX8MQ_IOMUXC_SD2_DATA2_USDHC2_DATA2	0xcf
>  			MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3	0xcf
> +			MX8MQ_IOMUXC_GPIO1_IO04_GPIO1_IO4	0xc1
>  		>;
>  	};
>  
> -- 
> 2.20.1
>