arm64: dts: m3ulcb: Fix EthernetAVB PHY timing

Set PHY rxc-skew-ps to 1500 and all other values to their default values.

This is intended to to address failures in the case of 1Gbps communication
using the salvator-x board with the KSZ9031RNX phy. This has been
reported to occur with both the r8a7795 (H3) and r8a7796 (M3-W) SoCs.

Based in a similar patch for the r8a7796 salvator-x by Kazuya Mizuguchi.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
index c2a4549d3738f81cf97d2ed71a3b6e1c2725e895..440d93e8388df3ede45109d7f51ac696da06e477 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
@@ -169,18 +169,7 @@
        status = "okay";
 
        phy0: ethernet-phy@0 {
-               rxc-skew-ps = <900>;
-               rxdv-skew-ps = <0>;
-               rxd0-skew-ps = <0>;
-               rxd1-skew-ps = <0>;
-               rxd2-skew-ps = <0>;
-               rxd3-skew-ps = <0>;
-               txc-skew-ps = <900>;
-               txen-skew-ps = <0>;
-               txd0-skew-ps = <0>;
-               txd1-skew-ps = <0>;
-               txd2-skew-ps = <0>;
-               txd3-skew-ps = <0>;
+               rxc-skew-ps = <1500>;
                reg = <0>;
                interrupt-parent = <&gpio2>;
                interrupts = <11 IRQ_TYPE_LEVEL_LOW>;