Re: [PATCH] imx8mn-var-som: dts: fix PHY detection bug by adding deassert delay

[Fabio Estevam]

Hi Hugo,

On Thu, Apr 27, 2023 at 4:56 PM Hugo Villeneuve <hugo@xxxxxxxxxxx> wrote:
>
> From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
>
> While testing the ethernet interface on a symphony carrier
> board using an imx8mn SOM with an onboard PHY (EC hardware
> configuration), the ethernet PHY is not detected.
>
> The device tree in Variscite custom linux git repository uses the
> following property:
>
>     phy-reset-post-delay = <20>;
>
> Add a new property 'reset-deassert-us' of 20ms to have the same delay
> inside the ethphy handle.

Which Ethernet PHY does this board use?

What does its datasheet recommend?