From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@xxxxxxxxxxx>
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 by salvator-x board with the KSZ9031RNX phy. This has been
reported to occur with both the r8a7795 (H3) and r8a7796 (M3-W) SoCs.
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@xxxxxxxxxxx>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
---
v1 [Simon Horman]
* Do not set values to defaults, omit them and let the driver set the defaults
* Rewrote changelog
N.B. The communications failures have been reported by the BSP team,
however I did not observe them during testing with a
salvator-x/M3-W-ES1.0
I have also exercised this on salvator-x/H3-ES1.0, which
supports a maximum communication speed of 100Mbit/s. I did
not observe communications failures during that testing.
My test-case was to bring up the system using NFS root and
run: netperf -H <HOST>
v0 [Kazuya Mizuguchi]
---
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 13 +------------
1 file changed, 1 insertion(+), 12 deletions(-)
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index dc1177c76aa5..5158ba3f9ce3 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -497,18 +497,7 @@
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>;
--
2.7.0.rc3.207.g0ac5344
