[PATCH] ARM: dts: stm32: Update eth1addr from EEPROM if eth1 present

[Marek Vasut]

The STM32MP1 DHCOM has two ethernet interfaces, the on-SoM DWMAC and KS8851.
Set eth1addr for the KS8851 to a MAC address of the DWMAC incremented by 1.
The MAC of the DWMAC is set from on-SoM EEPROM already, but the MAC address
of KS8851 was left uninitialized, so fix this.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Patrice Chotard <patrice.chotard at st.com>
Cc: Patrick Delaunay <patrick.delaunay at st.com>
---
 arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi |  1 +
 board/dhelectronics/dh_stm32mp1/board.c    | 25 ++++++++++++++++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
index f96de9e7a3..92345b7ba3 100644
--- a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
@@ -18,6 +18,7 @@
 		mmc1 = &sdmmc2;
 		spi0 = &qspi;
 		usb0 = &usbotg_hs;
+		ethernet1 = &ksz8851;
 	};
 
 	config {
diff --git a/board/dhelectronics/dh_stm32mp1/board.c b/board/dhelectronics/dh_stm32mp1/board.c
index 17dbf20d76..17018716fd 100644
--- a/board/dhelectronics/dh_stm32mp1/board.c
+++ b/board/dhelectronics/dh_stm32mp1/board.c
@@ -84,11 +84,26 @@ DECLARE_GLOBAL_DATA_PTR;
 int setup_mac_address(void)
 {
 	unsigned char enetaddr[6];
+	bool skip_eth0 = false;
+	bool skip_eth1 = false;
 	struct udevice *dev;
 	int off, ret;
 
 	ret = eth_env_get_enetaddr("ethaddr", enetaddr);
 	if (ret)	/* ethaddr is already set */
+		skip_eth0 = true;
+
+	off = fdt_path_offset(gd->fdt_blob, "ethernet1");
+	if (off < 0) {
+		/* ethernet1 is not present in the system */
+		skip_eth1 = true;
+	} else {
+		ret = eth_env_get_enetaddr("eth1addr", enetaddr);
+		if (ret)	/* eth1addr is already set */
+			skip_eth1 = true;
+	}
+
+	if (skip_eth0 && skip_eth1)
 		return 0;
 
 	off = fdt_path_offset(gd->fdt_blob, "eeprom0");
@@ -109,8 +124,14 @@ int setup_mac_address(void)
 		return ret;
 	}
 
-	if (is_valid_ethaddr(enetaddr))
-		eth_env_set_enetaddr("ethaddr", enetaddr);
+	if (is_valid_ethaddr(enetaddr)) {
+		if (!skip_eth0)
+			eth_env_set_enetaddr("ethaddr", enetaddr);
+
+		enetaddr[5]++;
+		if (!skip_eth1)
+			eth_env_set_enetaddr("eth1addr", enetaddr);
+	}
 
 	return 0;
 }
-- 
2.27.0