usb: chipidea: host: add suspend/resume support for host controller

The controller's power may be powered off during system suspend. This
will add suspend/resume support when the controller suffers power lost.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20221013151442.3262951-4-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/host.c

@@ -459,6 +459,18 @@ static void ci_hdrc_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 	ci_hdrc_free_dma_aligned_buffer(urb);
 }
 
+#ifdef CONFIG_PM_SLEEP
+static void ci_hdrc_host_suspend(struct ci_hdrc *ci)
+{
+	ehci_suspend(ci->hcd, device_may_wakeup(ci->dev));
+}
+
+static void ci_hdrc_host_resume(struct ci_hdrc *ci, bool power_lost)
+{
+	ehci_resume(ci->hcd, power_lost);
+}
+#endif
+
 int ci_hdrc_host_init(struct ci_hdrc *ci)
 {
 	struct ci_role_driver *rdrv;
@@ -472,6 +484,10 @@ int ci_hdrc_host_init(struct ci_hdrc *ci)
 
 	rdrv->start	= host_start;
 	rdrv->stop	= host_stop;
+#ifdef CONFIG_PM_SLEEP
+	rdrv->suspend	= ci_hdrc_host_suspend;
+	rdrv->resume	= ci_hdrc_host_resume;
+#endif
 	rdrv->irq	= host_irq;
 	rdrv->name	= "host";
 	ci->roles[CI_ROLE_HOST] = rdrv;