cmd: ubi: add option to specify volume id

index 4a92d84..b66bc62 100644
@@ -162,7 +162,7 @@ bad:
 	return err;
 }
 
-static int ubi_create_vol(char *volume, int64_t size, int dynamic)
+static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id)
 {
 	struct ubi_mkvol_req req;
 	int err;

@@ -172,7 +172,7 @@ static int ubi_create_vol(char *volume, int64_t size, int dynamic)
 	else
 		req.vol_type = UBI_STATIC_VOLUME;
 
-	req.vol_id = UBI_VOL_NUM_AUTO;
+	req.vol_id = vol_id;
 	req.alignment = 1;
 	req.bytes = size;
 

@@ -577,10 +577,17 @@ static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 	if (strncmp(argv[1], "create", 6) == 0) {
 		int dynamic = 1;	/* default: dynamic volume */
+		int id = UBI_VOL_NUM_AUTO;
 
 		/* Use maximum available size */
 		size = 0;
 
+		/* E.g., create volume size type vol_id */
+		if (argc == 6) {
+			id = simple_strtoull(argv[5], NULL, 16);
+			argc--;
+		}
+
 		/* E.g., create volume size type */
 		if (argc == 5) {
 			if (strncmp(argv[4], "s", 1) == 0)

@@ -603,7 +610,7 @@ static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		}
 		/* E.g., create volume */
 		if (argc == 3)
-			return ubi_create_vol(argv[2], size, dynamic);
+			return ubi_create_vol(argv[2], size, dynamic, id);
 	}
 
 	if (strncmp(argv[1], "remove", 6) == 0) {

@@ -684,7 +691,7 @@ U_BOOT_CMD(
 		" - Display volume and ubi layout information\n"
 	"ubi check volumename"
 		" - check if volumename exists\n"
-	"ubi create[vol] volume [size] [type]"
+	"ubi create[vol] volume [size] [type] [id]"
 		" - create volume name with size\n"
 	"ubi write[vol] address volume size"
 		" - Write volume from address with size\n"