[v2,04/10] usb: ehci-orion: add S2RAM support

[Miquel Raynal <miquel.raynal@bootlin.com>]

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

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/usb/host/ehci-orion.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 3109f082949e..dab22aa57c0b 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -182,6 +182,30 @@ 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);
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+	ehci_prepare_ports_for_controller_suspend(ehci,
+						  device_may_wakeup(dev));
+
+	return ehci_suspend(hcd, false);
+}
+
+static int __maybe_unused ehci_orion_drv_resume(struct device *dev)
+{
+	struct usb_hcd *hcd = dev_get_drvdata(dev);
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+	ehci_prepare_ports_for_controller_resume(ehci);
+
+	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 +358,7 @@ static struct platform_driver ehci_orion_driver = {
 	.driver = {
 		.name	= "orion-ehci",
 		.of_match_table = ehci_orion_dt_ids,
+		.pm = &ehci_orion_pm_ops,
 	},
 };