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usb: host: cdns3: forward lost power information to xhci

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cdns3-plat can know if power was lost across system-wide suspend.
Forward that information:

 - Grab the lost_power bool from cdns_role_driver::resume(). Store it
   into the power_lost field in struct xhci_plat_priv.

 - xhci-plat will call xhci_resume() with that value (ORed to whether we
   are in a hibernation restore).

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20250205-s2r-cdns-v7-9-13658a271c3c@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Théo Lebrun 2025-02-05 18:36:54 +01:00 • committed by Greg Kroah-Hartman
parent 668cc6bc11
commit 3a85c10115
1 changed files with 11 additions and 0 deletions
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11
drivers/usb/cdns3/host.c
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@ -138,6 +138,16 @@ static void cdns_host_exit(struct cdns *cdns)
cdns_drd_host_off(cdns);
}
static int cdns_host_resume(struct cdns *cdns, bool power_lost)
{
struct usb_hcd *hcd = platform_get_drvdata(cdns->host_dev);
struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
priv->power_lost = power_lost;
return 0;
}
int cdns_host_init(struct cdns *cdns)
{
struct cdns_role_driver *rdrv;
@ -148,6 +158,7 @@ int cdns_host_init(struct cdns *cdns)
rdrv->start = __cdns_host_init;
rdrv->stop = cdns_host_exit;
rdrv->resume = cdns_host_resume;
rdrv->state = CDNS_ROLE_STATE_INACTIVE;
rdrv->name = "host";