xhci-plat: Add hibernation support to xhci platform
Add hibernation support to xhci platform by adding
the proper PM ops freeze and restore.
Also set the hibernated argument to xhci_resume which
will trigger the reset-resume of the connected
root-hubs and the devices.
Change-Id: Ib536bb2485928326f34bfc3422b672cc62309efe
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index a1dedf0..67821a1 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -439,6 +439,39 @@
return -EBUSY;
}
+static int xhci_plat_pm_freeze(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ if (!xhci)
+ return 0;
+
+ dev_dbg(dev, "xhci-plat freeze\n");
+
+ return xhci_suspend(xhci, false);
+}
+
+static int xhci_plat_pm_restore(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret;
+
+ if (!xhci)
+ return 0;
+
+ dev_dbg(dev, "xhci-plat restore\n");
+
+ ret = xhci_resume(xhci, true);
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_mark_last_busy(dev);
+
+ return ret;
+}
+
static int xhci_plat_runtime_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -470,7 +503,9 @@
}
static const struct dev_pm_ops xhci_plat_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(NULL, NULL)
+ .freeze = xhci_plat_pm_freeze,
+ .restore = xhci_plat_pm_restore,
+ .thaw = xhci_plat_pm_restore,
SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend, xhci_plat_runtime_resume,
xhci_plat_runtime_idle)
};