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>

1 files changed, 1 insertions, 12 deletions

diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
index c2a4549d3738..440d93e8388d 100644
--- 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>;