Re: [PATCH net-next] ARM: dts: imx6qdl: Remove unnecessary mdio #address-cells/#size-cells
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2021-07-24 16:37:46
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linux-devicetree, netdev
On 7/23/2021 6:08 AM, Vladimir Oltean wrote:
Hi Fabio, On Fri, Jul 23, 2021 at 08:28:35AM -0300, Fabio Estevam wrote:quoted
Since commit dabb5db17c06 ("ARM: dts: imx6qdl: move phy properties into phy device node") the following W=1 dtc warnings are seen: arch/arm/boot/dts/imx6qdl-aristainetos2.dtsi:323.7-334.4: Warning (avoid_unnecessary_addr_size): /soc/bus@2100000/ethernet@2188000/mdio: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property Remove the unnecessary mdio #address-cells/#size-cells to fix it. Fixes: dabb5db17c06 ("ARM: dts: imx6qdl: move phy properties into phy device node") Signed-off-by: Fabio Estevam <festevam@gmail.com> ---Are you actually sure this is the correct fix? If I look at mdio.yaml, I think it is pretty clear that the "ethernet-phy" subnode of the MDIO controller must have an "@[0-9a-f]+$" pattern, and a "reg" property. If
It is valid to omit the "reg" property of an Ethernet PHY which the kernel will then dynamically scan for. If you know the Ethernet PHY address it's obviously better to set it so you avoid scanning and the time spent in doing that. The boot loader could (should?) also provide that information to the kernel for the same reasons. -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel