From bba25915b172c72f6fa635f091624d799e3c9cae Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Fri, 1 May 2020 08:27:56 +0100 Subject: [PATCH] arm64: tegra: Fix ethernet phy-mode for Jetson Xavier The 'phy-mode' property is currently defined as 'rgmii' for Jetson Xavier. This indicates that the RGMII RX and TX delays are set by the MAC and the internal delays set by the PHY are not used. If the Marvell PHY driver is enabled, such that it is used and not the generic PHY, ethernet failures are seen (DHCP is failing to obtain an IP address) and this is caused because the Marvell PHY driver is disabling the internal RX and TX delays. For Jetson Xavier the internal PHY RX and TX delay should be used and so fix this by setting the 'phy-mode' to 'rgmii-id' and not 'rgmii'. Fixes: f89b58ce71a9 ("arm64: tegra: Add ethernet controller on Tegra194") Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding --- arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi b/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi index 623f7d7..8e3136d 100644 --- a/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi @@ -33,7 +33,7 @@ phy-reset-gpios = <&gpio TEGRA194_MAIN_GPIO(G, 5) GPIO_ACTIVE_LOW>; phy-handle = <&phy>; - phy-mode = "rgmii"; + phy-mode = "rgmii-id"; mdio { #address-cells = <1>; -- 2.7.4