USB: s3c-hsotg: SoftDisconnect minimum 3ms

The shortest period SoftDisconnect can be asserted for is 3 milliseconds
according to the V210 datasheet, so ensure that we add an msleep() to
the registration code to enforce this.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 9abf96c5715d..31d19e1f261d 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2599,6 +2599,9 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
         writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK,
                hsotg->regs + S3C_DCTL);
 
+        /* must be at-least 3ms to allow bus to see disconnect */
+        msleep(3);
+
         /* remove the soft-disconnect and let's go */
         __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);