From: Vikas Sajjan <vikas.sajjan@xxxxxxxxxx>
Adding the suspend and resume functionality for the XHCI driver
Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
Signed-off-by: Vikas C Sajjan <vikas.sajjan@xxxxxxxxxx>
CC: Doug Anderson <dianders@xxxxxxxxxxxx>
---
drivers/usb/host/xhci-plat.c | 44 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index df90fe5..384cf4d 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -185,11 +185,55 @@ static int xhci_plat_remove(struct platform_device *dev)
return 0;
}
+#ifdef CONFIG_PM
+static int xhci_plat_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd;
+ struct xhci_hcd *xhci;
+
+ hcd = dev_get_drvdata(dev);
+ if (!hcd)
+ return -EINVAL;
+
+ xhci = hcd_to_xhci(hcd);
+
+ /* Make sure that the HCD Core as set state HC_STATE_SUSPENDED */
+ if (hcd->state != HC_STATE_SUSPENDED ||
+ xhci->shared_hcd->state != HC_STATE_SUSPENDED)
+ return -EINVAL;
+
+ return xhci_suspend(xhci);
+}
+
+static int xhci_plat_resume(struct device *dev)
+{
+ struct usb_hcd *hcd;
+ struct xhci_hcd *xhci;
+
+ hcd = dev_get_drvdata(dev);
+
+ if (!hcd)
+ return -EINVAL;
+
+ xhci = hcd_to_xhci(hcd);
+
+ return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_plat_pm_ops = {
+ .suspend = xhci_plat_suspend,
+ .resume = xhci_plat_resume,
+};
+#endif
+
static struct platform_driver usb_xhci_driver = {
.probe = xhci_plat_probe,
.remove = xhci_plat_remove,
.driver = {
.name = "xhci-hcd",
+#ifdef CONFIG_PM
+ .pm = &xhci_plat_pm_ops,
+#endif
},
};
MODULE_ALIAS("platform:xhci-hcd");
--
1.7.6.5
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