USB: chipidea: delay 2ms before read ID status at probe time

The ID pin needs 1ms debounce time, even at probe time. We delay 2ms
to be on the safe side.

Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 1083585..3c3ed77 100644 (file)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -462,6 +462,8 @@ static int __devinit ci_hdrc_probe(struct platform_device *pdev)
 
        if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
                ci->is_otg = true;
+               /* ID pin needs 1ms debouce time, we delay 2ms for safe */
+               mdelay(2);
                ci->role = ci_otg_role(ci);
        } else {
                ci->role = ci->roles[CI_ROLE_HOST]