Let U-Boot generate MAC address for db410

new file mode 100644
index 0000000000..5af6ae8da4
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Snapdragon DRAM
+ * Copyright (C) 2018 Ramon Fried <[email protected]>
+ */
+
+#ifndef MISC_H
+#define MISC_H
+
+u32 msm_board_serial(void);
+
+#endif

new file mode 100644
index 0000000000..678bd69f83
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Miscellaneous Snapdragon functionality
+ *
+ * (C) Copyright 2018 Ramon Fried <[email protected]>
+ *
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <asm/arch/misc.h>
+
+/* UNSTUFF_BITS macro taken from Linux Kernel: drivers/mmc/core/sd.c */
+#define UNSTUFF_BITS(resp, start, size) \
+	({ \
+		const int __size = size; \
+		const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1;	\
+		const int __off = 3 - ((start) / 32); \
+		const int __shft = (start) & 31; \
+		u32 __res; \
+					\
+		__res = resp[__off] >> __shft; \
+		if (__size + __shft > 32) \
+			__res |= resp[__off - 1] << ((32 - __shft) % 32); \
+		__res & __mask;	\
+	})
+
+u32 msm_board_serial(void)
+{
+	struct mmc *mmc_dev;
+
+	mmc_dev = find_mmc_device(0);
+	if (!mmc_dev)
+		return 0;
+
+	return UNSTUFF_BITS(mmc_dev->cid, 16, 32);
+}

index 5af6ae8da4..c60e3e4724 100644
@@ -8,5 +8,6 @@
 #define MISC_H
 
 u32 msm_board_serial(void);
+void msm_generate_mac_addr(u8 *mac);
 
 #endif

index 678bd69f83..f6c87866c0 100644
@@ -35,3 +35,19 @@ u32 msm_board_serial(void)
 
 	return UNSTUFF_BITS(mmc_dev->cid, 16, 32);
 }
+
+void msm_generate_mac_addr(u8 *mac)
+{
+	int i;
+	char sn[9];
+
+	snprintf(sn, 8, "%08x", msm_board_serial());
+
+	/* fill in the mac with serialno, use locally adminstrated pool */
+	mac[0] = 0x02;
+	mac[1] = 00;
+	for (i = 3; i >= 0; i--) {
+		mac[i + 2] = simple_strtoul(&sn[2 * i], NULL, 16);
+		sn[2 * i] = 0;
+	}
+}

index 4f0b999e50..53e231e55a 100644
@@ -10,7 +10,9 @@
 #include <usb.h>
 #include <asm/gpio.h>
 #include <fdt_support.h>
+#include <environment.h>
 #include <asm/arch/dram.h>
+#include <asm/arch/misc.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 

@@ -149,40 +151,38 @@ int board_init(void)
 	return 0;
 }
 
+/* Fixup of DTB for Linux Kernel
+ * 1. Fixup installed DRAM.
+ * 2. Fixup WLAN/BT Mac address:
+ *	First, check if MAC addresses for WLAN/BT exists as environemnt
+ *	variables wlanaddr,btaddr. if not, generate a unique address.
+ */
+
 int ft_board_setup(void *blob, bd_t *bd)
 {
-	int offset, len, i;
-	const char *mac;
-	struct {
-		const char *compatible;
-		const char *property;
-	} fix[] = {
-		[0] = {
-			/* update the kernel's dtb with wlan mac */
-			.compatible = "qcom,wcnss-wlan",
-			.property = "local-mac-address",
-		},
-		[1] = {
-			/* update the kernel's dtb with bt mac */
-			.compatible = "qcom,wcnss-bt",
-			.property = "local-bd-address",
-		},
+	u8 mac[ARP_HLEN];
+
+	msm_fixup_memory(blob);
+
+	if (!eth_env_get_enetaddr("wlanaddr", mac)) {
+		msm_generate_mac_addr(mac);
 	};
 
-	for (i = 0; i < sizeof(fix) / sizeof(fix[0]); i++) {
-		offset = fdt_node_offset_by_compatible(gd->fdt_blob, -1,
-						       fix[i].compatible);
-		if (offset < 0)
-			continue;
+	do_fixup_by_compat(blob, "qcom,wcnss-wlan",
+			   "local-mac-address", mac, ARP_HLEN, 1);
 
-		mac = fdt_getprop(gd->fdt_blob, offset, fix[i].property, &len);
-		if (mac)
-			do_fixup_by_compat(blob, fix[i].compatible,
-					   fix[i].property, mac, ARP_HLEN, 1);
-	}
 
-	msm_fixup_memory(blob);
+	if (!eth_env_get_enetaddr("btaddr", mac)) {
+		msm_generate_mac_addr(mac);
+
+/* The BD address is same as WLAN MAC address but with
+ * least significant bit flipped.
+ */
+		mac[0] ^= 0x01;
+	};
 
+	do_fixup_by_compat(blob, "qcom,wcnss-bt",
+			   "local-bd-address", mac, ARP_HLEN, 1);
 	return 0;
 }