USB: DWC_OTG: Support otg suspend and resume pm

Signed-off-by: Wu Liang feng <wulf@rock-chips.com>

diff --git a/drivers/usb/dwc_otg_310/dwc_otg_driver.c b/drivers/usb/dwc_otg_310/dwc_otg_driver.c
index fba497d60663f3a1559b2335c4ce1518c81d0879..f43627f3b8d865091c47867270a594472ce7ebcb 100755 (executable)
--- a/drivers/usb/dwc_otg_310/dwc_otg_driver.c
+++ b/drivers/usb/dwc_otg_310/dwc_otg_driver.c
@@ -1530,10 +1530,51 @@ clk_disable:
        return retval;
 }
 
+#ifdef CONFIG_PM
+static int dwc_otg_pm_suspend(struct device *dev)
+{
+       dwc_otg_device_t *dwc_otg_device;
+       struct dwc_otg_platform_data *pdata_otg;
+
+       dev_dbg(dev, "dwc_otg PM suspend\n");
+
+       dwc_otg_device = dev_get_platdata(dev);
+       pdata_otg = dwc_otg_device->pldata;
+       pdata_otg->phy_suspend(pdata_otg, USB_PHY_SUSPEND);
+
+       return 0;
+}
+
+static int dwc_otg_pm_resume(struct device *dev)
+{
+       dwc_otg_device_t *dwc_otg_device;
+       struct dwc_otg_platform_data *pdata_otg;
+
+       dev_dbg(dev, "dwc_otg PM resume\n");
+
+       dwc_otg_device = dev_get_platdata(dev);
+       pdata_otg = dwc_otg_device->pldata;
+       pdata_otg->phy_suspend(pdata_otg, USB_PHY_ENABLED);
+
+       return 0;
+}
+#else
+#define dwc_otg_pm_suspend     NULL
+#define dwc_otg_pm_resume      NULL
+#endif
+
+static const struct dev_pm_ops dwc_otg_dev_pm_ops = {
+       .suspend = dwc_otg_pm_suspend,
+       .resume = dwc_otg_pm_resume,
+};
+
 static struct platform_driver dwc_otg_driver = {
        .driver = {
                   .name = (char *)dwc_otg20_driver_name,
                   .of_match_table = of_match_ptr(usb20_otg_of_match),
+#ifdef CONFIG_PM
+                  .pm = &dwc_otg_dev_pm_ops,
+#endif
                   },
        .probe = otg20_driver_probe,
        .remove = otg20_driver_remove,