[PATCHv5 1/4] USB: gadget: atmel_usba_udc: Fixed vbus_prev initial state

Sylvain Rochet sylvain.rochet at finsecur.com
Wed Jan 21 11:31:11 PST 2015

If vbus gpio is high at init, we should set vbus_prev to true
accordingly to the current vbus state. Without that, we skip the first
vbus interrupt because the saved vbus state is not consistent.

Signed-off-by: Sylvain Rochet <sylvain.rochet at finsecur.com>
Acked-by: Nicolas Ferre <nicolas.ferre at atmel.com>
Fixes: 914a3f3b3754 ("USB: add atmel_usba_udc driver")
Cc: <stable at vger.kernel.org> #2.6.24+
 drivers/usb/gadget/udc/atmel_usba_udc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index ce88237..e207d75 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -1791,6 +1791,8 @@ static int atmel_usba_start(struct usb_gadget *gadget,
 		usba_writel(udc, CTRL, USBA_ENABLE_MASK);
 		usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
+		udc->vbus_prev = 1;
 	spin_unlock_irqrestore(&udc->lock, flags);

More information about the linux-arm-kernel mailing list