usb: gadget: r8a66597-udc: add pullup function

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/r8a66597-udc.c

@@ -1518,10 +1518,26 @@ static int r8a66597_get_frame(struct usb_gadget *_gadget)
 	return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
 }
 
+static int r8a66597_pullup(struct usb_gadget *gadget, int is_on)
+{
+	struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
+	unsigned long flags;
+
+	spin_lock_irqsave(&r8a66597->lock, flags);
+	if (is_on)
+		r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
+	else
+		r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
+	spin_unlock_irqrestore(&r8a66597->lock, flags);
+
+	return 0;
+}
+
 static struct usb_gadget_ops r8a66597_gadget_ops = {
 	.get_frame		= r8a66597_get_frame,
 	.start			= r8a66597_start,
 	.stop			= r8a66597_stop,
+	.pullup			= r8a66597_pullup,
 };
 
 static int __exit r8a66597_remove(struct platform_device *pdev)