linux-kernel - [PATCH 4.5 155/238] ARC: [plat-axs10x] add Ethernet PHY description in .dts

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Date:	Sun, 10 Apr 2016 11:35:32 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alexey Brodkin <abrodkin@...opsys.com>,
	Rob Herring <robh@...nel.org>,
	Phil Reid <preid@...ctromag.com.au>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Vineet Gupta <vgupta@...opsys.com>
Subject: [PATCH 4.5 155/238] ARC: [plat-axs10x] add Ethernet PHY description in .dts

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexey Brodkin <Alexey.Brodkin@...opsys.com>

commit 667a490bdb6e27db0887d2ca515b907d6aa87118 upstream.

Commit e34d65696d2e ("stmmac: create of compatible mdio bus for stmmac
driver") broke DW GMAC functionality on ARC AXS10x boards:

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
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arc/boot/dts/axs10x_mb.dtsi |    8 ++++++++
 1 file changed, 8 insertions(+)

--- 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";
+				phy1: ethernet-phy@1 {
+					reg = <1>;
+				};
+			};
 		};

 		ehci@...0000 {