linux-kernel - Re: [PATCH] ARM: dts: sunxi: Add mdio bus sub-node to GMAC

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Date:   Wed, 14 Aug 2019 08:17:17 +0200
From:   Maxime Ripard <mripard@...nel.org>
To:     Chen-Yu Tsai <wens@...nel.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: sunxi: Add mdio bus sub-node to GMAC

On Wed, Aug 14, 2019 at 12:22:08PM +0800, Chen-Yu Tsai wrote:
> From: Chen-Yu Tsai <wens@...e.org>
>
> The DWMAC binding never supported having the Ethernet PHY node as a
> direct child to the controller, nor did it support the "phy" property
> as a way to specify which Ethernet PHY to use. What seemed to work
> was simply the implementation ignoring the "phy" property and instead
> probing all addresses on the MDIO bus and using the first available
> one.
>
> The recent switch from "phy" to "phy-handle" breaks the assumptions
> of the implementation, and does not match what the binding requires.
> The binding requires that if an MDIO bus is described, it shall be
> a sub-node with the "snps,dwmac-mdio" compatible string.
>
> Add a device node for the MDIO bus, and move the Ethernet PHY node
> under it. Also fix up the #address-cells and #size-cells properties
> where needed.
>
> Fixes: de332de26d19 ("ARM: dts: sunxi: Switch from phy to phy-handle")
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>

Applied, thanks!
Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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