[U-Boot] [PATCH v5 21/27] p2371-2180: Pass Ethernet MAC to the kernel

[Thierry Reding <thierry.reding@gmail.com>]

From: Thierry Reding <treding@nvidia.com>

Pass the ethernet MAC address to the kernel upon boot. This passes both
the local-mac-address property (as passed to U-Boot from cboot) and the
currently set MAC address via the mac-address property. The latter will
only be set if it is different from the address that was already passed
via the local-mac-address property.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 board/nvidia/p2371-2180/p2371-2180.c | 50 ++++++++++++++++++++++++++++
 configs/p2371-2180_defconfig         |  1 +
 2 files changed, 51 insertions(+)

diff --git a/board/nvidia/p2371-2180/p2371-2180.c b/board/nvidia/p2371-2180/p2371-2180.c
index 212037da5ac0..a444d692d7ea 100644
--- a/board/nvidia/p2371-2180/p2371-2180.c
+++ b/board/nvidia/p2371-2180/p2371-2180.c
@@ -5,9 +5,12 @@
  */
 
 #include <common.h>
+#include <environment.h>
 #include <i2c.h>
+#include <linux/libfdt.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch-tegra/cboot.h>
 #include "../p2571/max77620_init.h"
 #include "pinmux-config-p2371-2180.h"
 
@@ -94,3 +97,50 @@ int tegra_pcie_board_init(void)
 	return 0;
 }
 #endif /* PCI */
+
+static void ft_mac_address_setup(void *fdt)
+{
+	const void *cboot_fdt = (const void *)cboot_boot_x0;
+	uint8_t mac[ETH_ALEN], local_mac[ETH_ALEN];
+	const char *path;
+	int offset, err;
+
+	err = cboot_get_ethaddr(cboot_fdt, local_mac);
+	if (err < 0)
+		memset(local_mac, 0, ETH_ALEN);
+
+	path = fdt_get_alias(fdt, "ethernet");
+	if (!path)
+		return;
+
+	debug("ethernet alias found: %s\n", path);
+
+	offset = fdt_path_offset(fdt, path);
+	if (offset < 0) {
+		printf("ethernet alias points to absent node %s\n", path);
+		return;
+	}
+
+	if (is_valid_ethaddr(local_mac)) {
+		err = fdt_setprop(fdt, offset, "local-mac-address", local_mac,
+				  ETH_ALEN);
+		if (!err)
+			debug("Local MAC address set: %pM\n", local_mac);
+	}
+
+	if (eth_env_get_enetaddr("ethaddr", mac)) {
+		if (memcmp(local_mac, mac, ETH_ALEN) != 0) {
+			err = fdt_setprop(fdt, offset, "mac-address", mac,
+					  ETH_ALEN);
+			if (!err)
+				debug("MAC address set: %pM\n", mac);
+		}
+	}
+}
+
+int ft_board_setup(void *fdt, bd_t *bd)
+{
+	ft_mac_address_setup(fdt);
+
+	return 0;
+}
diff --git a/configs/p2371-2180_defconfig b/configs/p2371-2180_defconfig
index 4923d330de6c..0ee4913a0469 100644
--- a/configs/p2371-2180_defconfig
+++ b/configs/p2371-2180_defconfig
@@ -5,6 +5,7 @@ CONFIG_TEGRA210=y
 CONFIG_TARGET_P2371_2180=y
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_OF_SYSTEM_SETUP=y
+CONFIG_OF_BOARD_SETUP=y
 CONFIG_CONSOLE_MUX=y
 CONFIG_SYS_STDIO_DEREGISTER=y
 CONFIG_SYS_PROMPT="Tegra210 (P2371-2180) # "
-- 
2.21.0