Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.15 01/29] ARM: dts: imx6qp-prtwd3: update RGMII delays for sja1105 switch | Date | Mon, 20 Dec 2021 20:57:22 -0500 |
| |
From: Vladimir Oltean <vladimir.oltean@nxp.com>
[ Upstream commit f2c2e9ebb2cf476c09e59d073db031fbf7ef4914 ]
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 <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/arm/boot/dts/imx6qp-prtwd3.dts | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/imx6qp-prtwd3.dts b/arch/arm/boot/dts/imx6qp-prtwd3.dts index b92e0f2748a51..29dd59bfa73dd 100644 --- a/arch/arm/boot/dts/imx6qp-prtwd3.dts +++ b/arch/arm/boot/dts/imx6qp-prtwd3.dts @@ -178,6 +178,8 @@ port@4 { label = "cpu"; ethernet = <&fec>; phy-mode = "rgmii-id"; + rx-internal-delay-ps = <2000>; + tx-internal-delay-ps = <2000>; fixed-link { speed = <100>; -- 2.34.1
| |