+#ifdef CONFIG_PM
+static int usba_udc_suspend(struct device *dev)
+{
+ struct usba_udc *udc = dev_get_drvdata(dev);
+
+ /* Not started */
+ if (!udc->driver)
+ return 0;
+
+ mutex_lock(&udc->vbus_mutex);
+
+ if (!device_may_wakeup(dev)) {
+ usba_stop(udc);
+ goto out;
+ }
+
+ /*
+ * Device may wake up. We stay clocked if we failed
+ * to request vbus irq, assuming always on.
+ */
+ if (gpio_is_valid(udc->vbus_pin)) {
+ usba_stop(udc);
+ enable_irq_wake(gpio_to_irq(udc->vbus_pin));
+ }
+
+out:
+ mutex_unlock(&udc->vbus_mutex);
+ return 0;
+}
+
+static int usba_udc_resume(struct device *dev)
+{
+ struct usba_udc *udc = dev_get_drvdata(dev);
+
+ /* Not started */
+ if (!udc->driver)
+ return 0;
+
+ if (device_may_wakeup(dev) && gpio_is_valid(udc->vbus_pin))
+ disable_irq_wake(gpio_to_irq(udc->vbus_pin));
+
+ /* If Vbus is present, enable the controller and wait for reset */
+ mutex_lock(&udc->vbus_mutex);
+ udc->vbus_prev = vbus_is_present(udc);
+ if (udc->vbus_prev)
+ usba_start(udc);
+ mutex_unlock(&udc->vbus_mutex);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(usba_udc_pm_ops, usba_udc_suspend, usba_udc_resume);
+