netdev - Re: [PATCH] ARC: axs10x - add Ethernet PHY description in .dts

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Date:	Tue, 15 Mar 2016 17:38:30 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
	linux-snps-arc@...ts.infradead.org
Cc:	Rob Herring <robh@...nel.org>, Phil Reid <preid@...ctromag.com.au>,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	stable@...r.kernel.org, #@...opsys.com, 4.5.x@...opsys.com
Subject: Re: [PATCH] ARC: axs10x - add Ethernet PHY description in .dts

Hello.

On 3/15/2016 12:29 PM, Alexey Brodkin wrote:

> Following commit broke DW GMAC functionality on AXS10x boards:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e34d65696d2ef13dc32f2a162556c86c461ed763
>
> That's what happens on eth0 up:
> --------------------------->8------------------------
> libphy: PHY stmmac-0:ffffffff not found
> eth0: Could not attach to PHY
> stmmac_open: Cannot attach to PHY (error: -19)
> --------------------------->8------------------------
>
> Simplest solution is to add PHY description in board's .dts.
> And so we do here.
>
> Signed-off-by: Alexey Brodkin <abrodkin@...opsys.com>
> Cc: Rob Herring <robh@...nel.org>
> Cc: Phil Reid <preid@...ctromag.com.au>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: linux-kernel@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Cc: stable@...r.kernel.org # 4.5.x
> ---
>   arch/arc/boot/dts/axs10x_mb.dtsi | 8 ++++++++
>   1 file changed, 8 insertions(+)
>
> diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
> index 44a578c..04b999e 100644
> --- a/arch/arc/boot/dts/axs10x_mb.dtsi
> +++ b/arch/arc/boot/dts/axs10x_mb.dtsi
> @@ -47,6 +47,14 @@
>   			clocks = <&apbclk>;
>   			clock-names = "stmmaceth";
>   			max-speed = <100>;
> +			mdio0 {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				compatible = "snps,dwmac-mdio";
> +				phy0: ethernet-phy@0 {

    The naming is inconsistent with the "reg" prop specified, should be @1.

MBR, Sergei