usb: chipidea: add system power management support

Add system power management support

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index fe3880541efd2f30b22948b4f03a58991d85a850..bd74f27a95e5c6b7b50f431921ba8c24b464405e 100644 (file)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -791,11 +791,59 @@ static int ci_hdrc_remove(struct platform_device *pdev)
        return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static void ci_controller_suspend(struct ci_hdrc *ci)
+{
+       ci_hdrc_enter_lpm(ci, true);
+
+       if (ci->usb_phy)
+               usb_phy_set_suspend(ci->usb_phy, 1);
+}
+
+static int ci_controller_resume(struct device *dev)
+{
+       struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+       dev_dbg(dev, "at %s\n", __func__);
+
+       ci_hdrc_enter_lpm(ci, false);
+
+       if (ci->usb_phy) {
+               usb_phy_set_suspend(ci->usb_phy, 0);
+               usb_phy_set_wakeup(ci->usb_phy, false);
+               hw_wait_phy_stable();
+       }
+
+       return 0;
+}
+
+static int ci_suspend(struct device *dev)
+{
+       struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+       if (ci->wq)
+               flush_workqueue(ci->wq);
+
+       ci_controller_suspend(ci);
+
+       return 0;
+}
+
+static int ci_resume(struct device *dev)
+{
+       return ci_controller_resume(dev);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops ci_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume)
+};
 static struct platform_driver ci_hdrc_driver = {
        .probe  = ci_hdrc_probe,
        .remove = ci_hdrc_remove,
        .driver = {
                .name   = "ci_hdrc",
+               .pm     = &ci_pm_ops,
                .owner  = THIS_MODULE,
        },
 };