linux-kernel - Re: [PATCH] ARM: dts: imx6qdl-apalis: add phy-supply

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Date:   Mon, 21 Jan 2019 15:30:30 +0100
From:   Stefan Agner <stefan@...er.ch>
To:     shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     max.krummenacher@...adex.com, marcel.ziswiler@...adex.com,
        dev@...henker.ch, kernel@...gutronix.de, fabio.estevam@....com,
        linux-imx@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: imx6qdl-apalis: add phy-supply

On 18.01.2019 14:32, Stefan Agner wrote:
> Use the VDD I/O rail as phy-supply regulator. Technically, the
> regulator has multiple rails, but currently the driver only
> supports a single phy-supply. The VDD I/O rail has the highest
> power consumption when software power down is used and hence
> the highest saving potential.

Please don't merge this patch. The vgen5_reg is also used as a pull-up
for USB ID pin, it would not be safe for the FEC driver to disable this
rail.

--
Stefan


> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
>  arch/arm/boot/dts/imx6qdl-apalis.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> index 0b47aecf336a..cf66f9ececbd 100644
> --- a/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> @@ -241,6 +241,7 @@
>  	phy-handle = <&ethphy>;
>  	phy-reset-duration = <10>;
>  	phy-reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
> +	phy-supply = <&vgen5_reg>;
>  	status = "okay";
>  
>  	mdio {