From 4a45086c0ca874858d4064ee26d45199bcab494d Mon Sep 17 00:00:00 2001
From: Antoine Mazeas <antoine@karthanis.net>
Date: Fri, 19 Aug 2022 10:56:46 +0200
Subject: [PATCH] rpi: Copy eth PHY address from fw DT to loaded DT

Some Raspberry Pi 400 boards, specifically rev 1.1, have a different
address for the ethernet PHY device than what is provided by the kernel
DTB. The correct address is provided by the firmware, so we should carry
it over into the loaded device tree so that ethernet works on such boards.

Signed-off-by: Antoine Mazeas <antoine@karthanis.net>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
---
 board/raspberrypi/rpi/rpi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
index d4b059c620..fc1fffedfb 100644
--- a/board/raspberrypi/rpi/rpi.c
+++ b/board/raspberrypi/rpi/rpi.c
@@ -547,6 +547,9 @@ void  update_fdt_from_fw(void *fdt, void *fw_fdt)
 
 	/* kernel address randomisation seed as provided by the firmware */
 	copy_property(fdt, fw_fdt, "/chosen", "kaslr-seed");
+
+	/* address of the PHY device as provided by the firmware  */
+	copy_property(fdt, fw_fdt, "ethernet0/mdio@e14/ethernet-phy@1", "reg");
 }
 
 int ft_board_setup(void *blob, struct bd_info *bd)
-- 
2.39.5