From f2c2e9ebb2cf476c09e59d073db031fbf7ef4914 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Wed, 20 Oct 2021 14:36:11 +0300 Subject: ARM: dts: imx6qp-prtwd3: update RGMII delays for sja1105 switch In the new behavior, the sja1105 driver expects there to be explicit RGMII delays present on the fixed-link ports, otherwise it will complain that it falls back to legacy behavior, which is to apply RGMII delays incorrectly derived from the phy-mode string. In this case, the legacy behavior of the driver is to apply both RX and TX delays. To preserve that, add explicit 2 nanosecond delays, which are identical with what the driver used to add (a 90 degree phase shift). The delays from the phy-mode are ignored by new kernels (it's still RGMII as long as it's "rgmii*" something), and the explicit {rx,tx}-internal-delay-ps properties are ignored by old kernels, so the change works both ways. Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Reviewed-by: Oleksij Rempel Signed-off-by: Shawn Guo --- arch/arm/boot/dts/imx6qp-prtwd3.dts | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/boot/dts/imx6qp-prtwd3.dts') diff --git a/arch/arm/boot/dts/imx6qp-prtwd3.dts b/arch/arm/boot/dts/imx6qp-prtwd3.dts index 7648e8a02000..cf6571cc4682 100644 --- a/arch/arm/boot/dts/imx6qp-prtwd3.dts +++ b/arch/arm/boot/dts/imx6qp-prtwd3.dts @@ -178,6 +178,8 @@ label = "cpu"; ethernet = <&fec>; phy-mode = "rgmii-id"; + rx-internal-delay-ps = <2000>; + tx-internal-delay-ps = <2000>; fixed-link { speed = <100>; -- cgit