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

From: Greg Kroah-Hartman <[email-masked]>
Date: Sun, 10 Apr 2016 11:35:32 -0700

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

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

From: Alexey Brodkin <[email-masked]>

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 <[email-masked]>
Cc: Rob Herring <[email-masked]>
Cc: Phil Reid <[email-masked]>
Cc: David S. Miller <[email-masked]>
Cc: [email-masked]
Cc: [email-masked]
Reviewed-by: Sergei Shtylyov <[email-masked]>
Signed-off-by: Vineet Gupta <[email-masked]>
Signed-off-by: Greg Kroah-Hartman <[email-masked]>

---
 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@0x40000 {