[PATCH 2/3] ARM: board: meson: update efuse MAC reading code

[Christian Hewitt]

Current code used for reading the factory programmed MAC from efuse on
p200 boards does not appear to work resulting in a random MAC being
generated. Update the p200 board data reusing the function from the VIM3
source.

Signed-off-by: Christian Hewitt <christianshewitt at gmail.com>
---
 board/amlogic/p200/p200.c | 35 +++++++++++++++++++++--------------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/board/amlogic/p200/p200.c b/board/amlogic/p200/p200.c
index 7c432f9d281..fb07eefa532 100644
--- a/board/amlogic/p200/p200.c
+++ b/board/amlogic/p200/p200.c
@@ -14,29 +14,36 @@
 #include <asm/arch/eth.h>
 #include <asm/arch/mem.h>
 
-#define EFUSE_SN_OFFSET		20
-#define EFUSE_SN_SIZE		16
-#define EFUSE_MAC_OFFSET	52
-#define EFUSE_MAC_SIZE		6
+#define EFUSE_MAC_OFFSET	0
+#define EFUSE_MAC_SIZE		12
+#define MAC_ADDR_LEN		6
 
 int misc_init_r(void)
 {
-	u8 mac_addr[EFUSE_MAC_SIZE];
-	char serial[EFUSE_SN_SIZE];
+	u8 mac_addr[MAC_ADDR_LEN];
+	char efuse_mac_addr[EFUSE_MAC_SIZE], tmp[3];
 	ssize_t len;
 
 	if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
 		len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
-					  mac_addr, EFUSE_MAC_SIZE);
-		if (len == EFUSE_MAC_SIZE && is_valid_ethaddr(mac_addr))
+					  efuse_mac_addr, EFUSE_MAC_SIZE);
+		if (len != EFUSE_MAC_SIZE)
+			return 0;
+
+		/* MAC is stored in ASCII format, 1bytes = 2characters */
+		for (int i = 0; i < 6; i++) {
+			tmp[0] = efuse_mac_addr[i * 2];
+			tmp[1] = efuse_mac_addr[i * 2 + 1];
+			tmp[2] = '\0';
+			mac_addr[i] = simple_strtoul(tmp, NULL, 16);
+		}
+
+		if (is_valid_ethaddr(mac_addr))
 			eth_env_set_enetaddr("ethaddr", mac_addr);
-	}
+		else
+			meson_generate_serial_ethaddr();
 
-	if (!env_get("serial#")) {
-		len = meson_sm_read_efuse(EFUSE_SN_OFFSET, serial,
-			EFUSE_SN_SIZE);
-		if (len == EFUSE_SN_SIZE)
-			env_set("serial#", serial);
+		eth_env_get_enetaddr("ethaddr", mac_addr);
 	}
 
 	return 0;
-- 
2.34.1