[U-Boot] [PATCH] usb: ci_udc: respect CONFIG_USB_GADGET_DUALSPEED

[Eric Nelson <eric.nelson@boundarydevices.com>]

Force full-speed (12 Mbit/s) operation if CONFIG_USB_GADGET_DUALSPEED
is not defined.

The controller is capable of high-speed (480 Mbit/s) operation,
but some designs may require the use of lower-speed operation.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
---
 V2 uses PFSC constant, setbits_le32, and expands commit message
 V3 removes restriction on i.MX6 and extraneous declaration

 drivers/usb/gadget/ci_udc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/gadget/ci_udc.c b/drivers/usb/gadget/ci_udc.c
index 2572b34..b0ef35e 100644
--- a/drivers/usb/gadget/ci_udc.c
+++ b/drivers/usb/gadget/ci_udc.c
@@ -777,6 +777,11 @@ static int ci_pullup(struct usb_gadget *gadget, int is_on)
 		/* select DEVICE mode */
 		writel(USBMODE_DEVICE, &udc->usbmode);
 
+#if !defined(CONFIG_USB_GADGET_DUALSPEED)
+		/* Port force Full-Speed Connect */
+		setbits_le32(&udc->portsc, PFSC);
+#endif
+
 		writel(0xffffffff, &udc->epflush);
 
 		/* Turn on the USB connection by enabling the pullup resistor */
-- 
1.9.1