ARM: AM43XX: Add CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG support

CONFIG_ENV_VARS_UBOOT_CONFIG, CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG and
CONFIG_BOARD_LATE_INIT is already set. Adding support to detect the
board. These variables are used by findfdt.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

board/ti/am43xx/board.c

@@ -98,6 +98,22 @@ int board_init(void)
 #ifdef CONFIG_BOARD_LATE_INIT
 int board_late_init(void)
 {
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+	char safe_string[HDR_NAME_LEN + 1];
+	struct am43xx_board_id header;
+
+	if (read_eeprom(&header) < 0)
+		puts("Could not get board ID.\n");
+
+	/* Now set variables based on the header. */
+	strncpy(safe_string, (char *)header.name, sizeof(header.name));
+	safe_string[sizeof(header.name)] = 0;
+	setenv("board_name", safe_string);
+
+	strncpy(safe_string, (char *)header.version, sizeof(header.version));
+	safe_string[sizeof(header.version)] = 0;
+	setenv("board_rev", safe_string);
+#endif
 	return 0;
 }
 #endif