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 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 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 <michal.simek@amd.com>
Link: https://lore.kernel.org/r/6d360e71a0530d201578e27a6997dbd472772e39.1737466907.git.michal.simek@amd.com

diff --git a/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
index d56e863..02be5e1 100644 (file)
--- a/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
+++ b/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
@@ -22,6 +22,10 @@
                     "xlnx,zynqmp-sk-kd240", "xlnx,zynqmp";
        model = "ZynqMP KD240 revA/B/1";
 
+       aliases {
+               ethernet0 = "/axi/ethernet@ff0c0000"; /* &gem1 */
+       };
+
        ina260-u3 {
                compatible = "iio-hwmon";
                io-channels = <&u3 0>, <&u3 1>, <&u3 2>;

diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kr-g-revA.dtso
index 9d0c0c2..fbacfa9 100644 (file)
--- a/arch/arm/dts/zynqmp-sck-kr-g-revA.dtso
+++ b/arch/arm/dts/zynqmp-sck-kr-g-revA.dtso
@@ -20,6 +20,11 @@
                     "xlnx,zynqmp-sk-kr260", "xlnx,zynqmp";
        model = "ZynqMP KR260 revA";
 
+       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/arm/dts/zynqmp-sck-kv-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso
index a98a888..3c36eb5 100644 (file)
--- a/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso
+++ b/arch/arm/dts/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/arm/dts/zynqmp-sck-kv-g-revB.dtso b/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso
index 7490efe..078d98e 100644 (file)
--- a/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso
+++ b/arch/arm/dts/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>;