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

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Date:	Tue, 15 Mar 2016 12:29:10 +0300
From:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:	linux-snps-arc@...ts.infradead.org
Cc:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
	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: [PATCH] ARC: axs10x - add Ethernet PHY description in .dts

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 {
+					reg = <1>;
+				};
+			};
 		};
 
 		ehci@...0000 {
-- 
2.5.0