ENGR00232755 USB: disable clock and abnormal wakeup when remove gadget driver

- In current bsp, the usb clock mismatch when rmmod gadget class driver. The
  clock should be turn off when gadget class driver unregister.
- There is an abnormal usb wakeup interrupt happen if phy is no power without
  VBUS. If we unplug the usb cable after unregister usb gadget driver, it is
  difficult to handle the unexpected usb wakeup interrupt. SO we must call
  dr_discharge_line()  to make sure no abnormal usb wakeup interrupt happen in
  usb unregister gadget class driver.

Signed-off-by: make shi <b15407@freescale.com>

diff --git a/drivers/usb/gadget/arcotg_udc.c b/drivers/usb/gadget/arcotg_udc.c
index 04824da1c07f476cd02f5bc90268e0b88bd3d2a6..d1a2e27bcd562e2029793194c210006d74ed60ec 100755 (executable)
--- a/drivers/usb/gadget/arcotg_udc.c
+++ b/drivers/usb/gadget/arcotg_udc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2012 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2004-2013 Freescale Semiconductor, Inc. All Rights Reserved.
  */
 
 /*
@@ -562,6 +562,8 @@ static void dr_controller_stop(struct fsl_udc *udc)
        tmp &= ~USB_CMD_RUN_STOP;
        fsl_writel(tmp, &dr_regs->usbcmd);
 
+       /* disable pulldown dp and dm */
+       dr_discharge_line(udc->pdata, true);
        return;
 }
 
@@ -2519,6 +2521,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 
        dr_phy_low_power_mode(udc_controller, true);
 
+       dr_clk_gate(false);
        printk(KERN_INFO "unregistered gadget driver '%s'\r\n",
               driver->driver.name);
        return 0;