fastboot: Add USB cable detect check

Add a check for USB cable attached and only enter fastboot when a cable
is attached.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Steve Rae <srae@broadcom.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>

diff --git a/common/cmd_fastboot.c b/common/cmd_fastboot.c
index b72f4f310d83debe00e201c824a71e5018afcd90..346ab804541fd951316ca962ca3f5bb727f53244 100644 (file)
--- a/common/cmd_fastboot.c
+++ b/common/cmd_fastboot.c
@@ -20,6 +20,12 @@ static int do_fastboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
        if (ret)
                return ret;
 
+       if (!g_dnl_board_usb_cable_connected()) {
+               puts("\rUSB cable not detected.\n" \
+                    "Command exit.\n");
+               return CMD_RET_FAILURE;
+       }
+
        while (1) {
                if (g_dnl_detach())
                        break;