From 126a2fca500004a4b03ea377da000e8972efaed6 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Fri, 27 May 2011 13:37:33 +0900 Subject: usb: gadget: introduce delay when setting address of tegra device Some windows host drivers require this small delay in order to properly detect the tegra device. This patch ensures correct detection in all cases. Workaround for bug 814907 (cherry picked from commit 53c4f00605677c8de4311586c4f75903978cbd94) Change-Id: Ib950c39bc6f28e28793ef655e0bb9e04ebb39942 Reviewed-on: http://git-master/r/35613 Reviewed-by: Alex Courbot Tested-by: Alex Courbot Reviewed-by: Bharat Nihalani --- drivers/usb/gadget/fsl_udc_core.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c index c67230db46eb..82118cd1cbf7 100644 --- a/drivers/usb/gadget/fsl_udc_core.c +++ b/drivers/usb/gadget/fsl_udc_core.c @@ -1561,6 +1561,11 @@ static void setup_received_irq(struct fsl_udc *udc, if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE)) break; +#ifdef CONFIG_ARCH_TEGRA + /* This delay is necessary for some windows drivers to + * properly recognize the device */ + mdelay(1); +#endif ch9setaddress(udc, wValue, wIndex, wLength); return; -- cgit v1.2.3