ARC: [plat-hsdk]: Switch ethernet phy-mode to rgmii-id

HSDK board has Micrel KSZ9031, recent commit
bcf3440c6dd ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
caused a breakdown of Ethernet.
Using 'phy-mode = "rgmii"' is not correct because accodring RGMII
specification it is necessary to have delay on RX (PHY to MAX)
which is not generated in case of "rgmii".
Using "rgmii-id" adds necessary delay and solves the issue.

Also adding name of PHY placed on HSDK board.

Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 5d64a5a..dcaa44e 100644 (file)
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -210,7 +210,7 @@
                        reg = <0x8000 0x2000>;
                        interrupts = <10>;
                        interrupt-names = "macirq";
-                       phy-mode = "rgmii";
+                       phy-mode = "rgmii-id";
                        snps,pbl = <32>;
                        snps,multicast-filter-bins = <256>;
                        clocks = <&gmacclk>;
@@ -228,7 +228,7 @@
                                #address-cells = <1>;
                                #size-cells = <0>;
                                compatible = "snps,dwmac-mdio";
-                               phy0: ethernet-phy@0 {
+                               phy0: ethernet-phy@0 { /* Micrel KSZ9031 */
                                        reg = <0>;
                                };
                        };