Commit 2f64d6a6 authored by Xu Yang's avatar Xu Yang Committed by Greg Kroah-Hartman
Browse files

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: default avatarXu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20221013151442.3262951-4-xu.yang_2@nxp.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 450857c6

drivers/usb/chipidea/host.c

+16 −0
Original line number Diff line number Diff line
@@ -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;