When only sspi is entered, help information can be printed. Signed-off-by: chenzhipeng <chenzhipeng@eswincomputing.com> Reviewed-by: Simon Glass <sjg@chromium.org>
@@ -112,6 +112,9 @@ int do_spi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
if ((flag & CMD_FLAG_REPEAT) == 0)
{
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
if (argc >= 2) {
mode = CONFIG_DEFAULT_SPI_MODE;
bus = dectoul(argv[1], &cp);