Re: [PATCH V2 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Leonard Crestez <leonard.crestez@xxxxxxx>]

On 21.10.2019 13:19, Peng Fan wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
> 
> We should not rely on bootloader to configure the phy reset.
> So introduce phy-reset-gpios property to let Linux handle phy reset
> itself.
> 
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> Reviewed-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>

This broke NFS boot for me in next-20191031: board now hangs on DHCP.

It can be fixed by reverting this DT patch or by setting 
CONFIG_AT803X_PHY to y instead of m.

Needing a phy module is not a bug but everybody will need to either 
adjust .config or build modules into an initramfs somehow.

> ---
> 
> V2:
>   U-Boot->bootloader
>   Add R-b tag
> 
>   arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> index faefb7182af1..e4d66f7db09d 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> @@ -80,6 +80,7 @@
>   	pinctrl-0 = <&pinctrl_fec1>;
>   	phy-mode = "rgmii-id";
>   	phy-handle = <&ethphy0>;
> +	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
>   	fsl,magic-packet;
>   	status = "okay";