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>

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 9abf96c5715d836ab117067b33bb496b727508f6..31d19e1f261d3f9b25ab6f968842682b4cb174d0 100644 (file)
--- 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);