[U-Boot] [PATCH] board: am335x: Set serial# variable

[Sam Protsenko]

serial# variable is needed to show device correctly in "fastboot
devices" output. It's useful when we have several devices (in fastboot
mode) connected to single host and want to choose which one to flash.

Reuse board_serial variable (obtained from EEPROM in
set_board_info_env() function) to set serial#. We can't use
omap_die_id_serial(), because AM335x lacks DIE_ID, as can be seen from
AM335x TRM. The other available option would be to reuse ethaddr
variable, but using board_serial seems more reasonable for this purpose.

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
---
 board/ti/am335x/board.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index 1a52bffc00..4d421697bf 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -732,6 +732,10 @@ int board_late_init(void)
 	 */
 	if (get_device_type() == HS_DEVICE)
 		env_set("boot_fit", "1");
+
+	/* Reuse serial number set by set_board_info_env() (from EEPROM) */
+	if (!env_get("serial#"))
+		env_set("serial#", env_get("board_serial"));
 #endif
 
 #if !defined(CONFIG_SPL_BUILD)
-- 
2.16.1