From: Vikas Sajjan <vikas.sajjan@xxxxxxxxxx>
Adds power management support to xHCI platform driver.
This patch facilitates the transition of xHCI host controller
between S0 and S3/S4 power states, during suspend/resume cycles.
Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
Signed-off-by: Vikas C Sajjan <vikas.sajjan@xxxxxxxxxx>
CC: Doug Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
Hi Sarah,
can you carry this patch for v3.10 merge window ? I have
refreshed it against v3.8-rc7 and dropped the check
for HC_STATE_SUSPENDED which we have moved to xhci_suspend()
itself.
cheers
drivers/usb/host/xhci-plat.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index df90fe5..45913d1 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -185,11 +185,34 @@ static int xhci_plat_remove(struct platform_device *dev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int xhci_plat_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ return xhci_suspend(xhci);
+}
+
+static int xhci_plat_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ return xhci_resume(xhci, 0);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops xhci_plat_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
+};
+
static struct platform_driver usb_xhci_driver = {
.probe = xhci_plat_probe,
.remove = xhci_plat_remove,
.driver = {
.name = "xhci-hcd",
+ .pm = &xhci_plat_pm_ops,
},
};
MODULE_ALIAS("platform:xhci-hcd");
--
1.8.1.rc1.5.g7e0651a
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