From eb4a09d8cc31c90adaa12136ffdb7b57a6410873 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 2 Sep 2025 09:56:20 +0200 Subject: [PATCH] arm64: zynqmp: Describe ethernet controllers via aliases on SOM Add ethernet aliases to CC (Carrier card) description to create a connection which is used by U-BOOT (fdt_fixup_ethernet()) for updating local-mac-address in DT. On Kria SOM MAC address is read from i2c eeprom at start and based on it environment variables are created. Without creating aliases U-Boot is not able to inject local-mac-address DT property and OS won't get the same MAC address unless another i2c read is happening in OS. Also aliases are using string not phandle (because of dtso) that's why full path has to be provided but that shouldn't be a big issue because location of ethernet controller is fixed. Signed-off-by: Michal Simek Link: https://lore.kernel.org/r/72304150f87fd5e3338e31e2be8cf5d29955cc02.1756799774.git.michal.simek@amd.com --- arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso | 5 +++++ arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso | 4 ++++ arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso | 4 ++++ 3 files changed, 13 insertions(+) diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso index b7cda216b179..99ad220d13d6 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso +++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kr-g-revB.dtso @@ -20,6 +20,11 @@ "xlnx,zynqmp-sk-kr260", "xlnx,zynqmp"; model = "ZynqMP KR260 revB"; + aliases { + ethernet0 = "/axi/ethernet@ff0b0000"; /* &gem0 */ + ethernet1 = "/axi/ethernet@ff0c0000"; /* &gem1 */ + }; + ina260-u14 { compatible = "iio-hwmon"; io-channels = <&u14 0>, <&u14 1>, <&u14 2>; diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso index a98a888d1385..3c36eb52e968 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso +++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso @@ -28,6 +28,10 @@ "xlnx,zynqmp-sk-kv260", "xlnx,zynqmp"; model = "ZynqMP KV260 revA"; + aliases { + ethernet0 = "/axi/ethernet@ff0e0000"; /* &gem3 */ + }; + ina260-u14 { compatible = "iio-hwmon"; io-channels = <&u14 0>, <&u14 1>, <&u14 2>; diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso index 1d2b46d7949e..a4ae37ebaccf 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso +++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso @@ -23,6 +23,10 @@ "xlnx,zynqmp-sk-kv260", "xlnx,zynqmp"; model = "ZynqMP KV260 revB"; + aliases { + ethernet0 = "/axi/ethernet@ff0e0000"; /* &gem3 */ + }; + ina260-u14 { compatible = "iio-hwmon"; io-channels = <&u14 0>, <&u14 1>, <&u14 2>;