linux-kernel - Re: [PATCH 2/3] ARM: dts: imx7: add support for kamstrup flex concentrator

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Message-ID: <CAOMZO5DsyqRgD8n-w=6OmnXuMX+1T2DDOjQLNK133=FaqtWXVQ@mail.gmail.com>
Date:   Tue, 14 Jul 2020 08:54:06 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Bruno Thomsen <bruno.thomsen@...il.com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Bruno Thomsen <bth@...strup.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Subject: Re: [PATCH 2/3] ARM: dts: imx7: add support for kamstrup flex concentrator

Hi Bruno,

On Tue, Jul 14, 2020 at 7:03 AM Bruno Thomsen <bruno.thomsen@...il.com> wrote:

> I have not yet been successful in converting the deprecated properties
> to generic phy properties, so hoping I could get a hit.
>
> Kernel error messages:
> mdio_bus 30be0000.ethernet-1: MDIO device at address 1 is missing.

Please double-check whether 1 is the correct address for the KSZ8051
Ethernet PHY as per your schematics.

Are there external pull-up/pull-down resistors for strapping the
various configuration pins for the PHY? Or are the pull-up/pull-down
provided by the i.MX7D pins?

If there are no external pull-ups, please make sure to configure the
pinctrl_enet1 accordingly, so that the Ethernet PHY address can be
properly configured and then mdio_bus driver can find it at the
correct address.

Please check in arch/arm/boot/dts/imx6qdl-sr-som.dtsi for an example
on how to configure the Ethernet PHY pin strapping via iMX IOMUX.