usb: ehci-orion: add S2RAM support

Add suspend/resume callbacks to reset the host controller properly
during S2RAM operation.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 3109f082949e43ac376f6f226fb98173f447a09c..790acf3633e8912382e414c8e5ac343438e5b8f1 100644 (file)
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -182,6 +182,23 @@ static int ehci_orion_drv_reset(struct usb_hcd *hcd)
        return ret;
 }
 
+static int __maybe_unused ehci_orion_drv_suspend(struct device *dev)
+{
+       struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+       return ehci_suspend(hcd, device_may_wakeup(dev));
+}
+
+static int __maybe_unused ehci_orion_drv_resume(struct device *dev)
+{
+       struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+       return ehci_resume(hcd, false);
+}
+
+static SIMPLE_DEV_PM_OPS(ehci_orion_pm_ops, ehci_orion_drv_suspend,
+                        ehci_orion_drv_resume);
+
 static const struct ehci_driver_overrides orion_overrides __initconst = {
        .extra_priv_size =      sizeof(struct orion_ehci_hcd),
        .reset = ehci_orion_drv_reset,
@@ -334,6 +351,7 @@ static struct platform_driver ehci_orion_driver = {
        .driver = {
                .name   = "orion-ehci",
                .of_match_table = ehci_orion_dt_ids,
+               .pm = &ehci_orion_pm_ops,
        },
 };