netdev - Re: [PATCH net-next] ARM: dts: imx6qdl: Remove unnecessary mdio #address-cells/#size-cells

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Message-ID: <CAOMZO5CvVA8xfkinRAhf=WLnLxjZ9mZask3jYm8=NSiSa5z+TQ@mail.gmail.com>
Date:   Sat, 24 Jul 2021 09:48:05 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Joakim Zhang <qiangqing.zhang@....com>
Cc:     Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Shawn Guo <shawnguo@...nel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Herring <robh+dt@...nel.org>,
        netdev <netdev@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH net-next] ARM: dts: imx6qdl: Remove unnecessary mdio #address-cells/#size-cells

Hi Joakim and Vladimir,

On Sat, Jul 24, 2021 at 2:21 AM Joakim Zhang <qiangqing.zhang@....com> wrote:

> I prepare this patch to fix dtbs_check when convert fec binding into schema.
> I realized that we need a "reg" under phy device node, but I also don't know how to add it since
> the phy is obviously not on board. And I check the phy code, it supports auto scan for PHYs with empty
> "reg" property.

I looked in the U-Boot code for the nitrogenx6x board:
https://source.denx.de/u-boot/u-boot/-/blob/master/board/boundary/nitrogen6x/nitrogen6x.c#L343-356

and it scans for a range of Ethernet PHY addresses.

As we can't pass a reg property in the dts in this case, the patch I
sent that removes the
#address-cells/#size-cells properties looks good, right?

What do you think?