usb: gadget: udc: renesas-usb3: clear VBOUT bit in DRD_CON

This driver should clear the bit. Otherwise, the VBUS will output
wrongly if the usb port on a board has VBUS output capability.

Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for
		      Renesas USB3.0 peripheral controller")
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 93a3bec..fb8fc34 100644 (file)
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -106,6 +106,7 @@
 
 /* DRD_CON */
 #define DRD_CON_PERI_CON       BIT(24)
+#define DRD_CON_VBOUT          BIT(0)
 
 /* USB_INT_ENA_1 and USB_INT_STA_1 */
 #define USB_INT_1_B3_PLLWKUP   BIT(31)
@@ -363,6 +364,7 @@ static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
 {
        /* FIXME: How to change host / peripheral mode as well? */
        usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
+       usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
 
        usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
        usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);