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From:   Fabio Estevam <festevam@gmail.com>
Date:   Thu, 27 Apr 2023 17:00:41 -0300
Message-ID: <CAOMZO5CQeeme6uhb8NCzR2QADjkBM-mRC9-GUnmhLWSGo5MMoQ@mail.gmail.com>
Subject: Re: [PATCH] imx8mn-var-som: dts: fix PHY detection bug by adding
 deassert delay
To:     Hugo Villeneuve <hugo@hugovil.com>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        NXP Linux Team <linux-imx@nxp.com>,
        Hugo Villeneuve <hvilleneuve@dimonoff.com>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
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Hi Hugo,

On Thu, Apr 27, 2023 at 4:56=E2=80=AFPM Hugo Villeneuve <hugo@hugovil.com> =
wrote:
>
> From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
>
> 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 =3D <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?