riscv: sifive: fu540: set serial environment variable from otp
This patch sets the serial# environment variable by reading the
board serial number from the OTP memory region.
Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/sifive/fu540/fu540.c b/board/sifive/fu540/fu540.c
index 11daf1a..47a2090 100644
--- a/board/sifive/fu540/fu540.c
+++ b/board/sifive/fu540/fu540.c
@@ -122,10 +122,20 @@
int misc_init_r(void)
{
- /* Set ethaddr environment variable if not set */
- if (!env_get("ethaddr"))
- fu540_setup_macaddr(fu540_read_serialnum());
+ u32 serial_num;
+ char buf[9] = {0};
+ /* Set ethaddr environment variable from board serial number */
+ if (!env_get("serial#")) {
+ serial_num = fu540_read_serialnum();
+ if (!serial_num) {
+ WARN(true, "Board serial number should not be 0 !!\n");
+ return 0;
+ }
+ snprintf(buf, sizeof(buf), "%08x", serial_num);
+ env_set("serial#", buf);
+ fu540_setup_macaddr(serial_num);
+ }
return 0;
}