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arm64: dts: exynos: Add Ethernet node for E850-96 board

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The E850-96 board has a hard-wired LAN9514 chip which acts as a USB hub
and Ethernet bridge. It's being discovered dynamically when the USB bus
gets enumerated, but the corresponding Ethernet device tree node is
still needed for the bootloader to pass the MAC address through. Add
LAN9514 nodes as described in [1]. 'local-mac-address' property (in the
'ethernet' node) is used for MAC address handover from the bootloader to
Linux.

[1] Documentation/devicetree/bindings/net/microchip,lan95xx.yaml

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20250731234532.12903-1-semen.protsenko@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Sam Protsenko 2025-07-31 18:45:32 -05:00 committed by Krzysztof Kozlowski
parent 8f5ae30d69
commit 3b745d0b3d
1 changed files with 15 additions and 0 deletions
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15
arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
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@ -21,6 +21,7 @@ / {
compatible = "winlink,e850-96", "samsung,exynos850";
aliases {
ethernet0 = &ethernet;
mmc0 = &mmc_0;
serial0 = &serial_0;
};
@ -241,10 +242,24 @@ &usbdrd {
};
&usbdrd_dwc3 {
#address-cells = <1>;
#size-cells = <0>;
dr_mode = "otg";
usb-role-switch;
role-switch-default-mode = "host";
hub@1 {
compatible = "usb424,9514";
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;
ethernet: ethernet@1 {
compatible = "usb424,ec00";
reg = <1>;
};
};
port {
usb1_drd_sw: endpoint {
remote-endpoint = <&usb_dr_connector>;