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Date:	Tue, 15 Mar 2016 14:50:02 +0000
From:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:	"sergei.shtylyov@...entembedded.com" 
	<sergei.shtylyov@...entembedded.com>
CC:	"robh@...nel.org" <robh@...nel.org>,
	"preid@...ctromag.com.au" <preid@...ctromag.com.au>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-snps-arc@...ts.infradead.org" 
	<linux-snps-arc@...ts.infradead.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH] ARC: axs10x - add Ethernet PHY description in .dts

Hi Sergei,

On Tue, 2016-03-15 at 17:38 +0300, Sergei Shtylyov wrote:
> 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.

Makes sense.
Will re-send it with mentioned fix.

-Alexey