From 2c832fe41a8d79d40bba8c5b7147ba47a1d15615 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Mon, 8 Mar 2021 15:08:34 +0200 Subject: [PATCH] arm64: dts: ls1028a: set up the real link speed for ENETC port 2 In NXP LS1028A there is a MAC-to-MAC internal link between enetc_port2 and mscc_felix_port4. This link operates at 2.5Gbps and is described as such for the mscc_felix_port4 node. The reason for the discrepancy is a limitation in the PHY library support for fixed-link nodes. Due to the fact that the PHY library registers a software PHY which emulates the clause 22 register map, the drivers/net/phy/fixed_phy.c driver only supports speeds up to 1Gbps. The mscc_felix_port4 node is probed by DSA, which does not use the PHY library directly, but phylink, and phylink has a different representation for fixed-link nodes, one that does not have the limitation of not being able to represent speeds > 1Gbps. Since the enetc driver was converted to phylink too as of commit 71b77a7a27a3 ("enetc: Migrate to PHYLINK and PCS_LYNX"), the limitation has been practically lifted there too, and we can describe the real link speed in the device tree now. Signed-off-by: Vladimir Oltean Signed-off-by: Shawn Guo --- arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi index c1f2f402ad53..c1b33ac7d887 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi @@ -1027,7 +1027,7 @@ status = "disabled"; fixed-link { - speed = <1000>; + speed = <2500>; full-duplex; }; }; -- 2.25.1