[PATCH v6 5/5] usb: cdns3: host: transmit lost_power signal from wrapper to XHCI

Théo Lebrun
2024-12-10T17:13:46Z

cdns_role_driver->resume() receives the information if power was lost
across suspend (ie if a reset occurred). Transmit that to the XHCI core
using the newly introduced lost_power flag.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
drivers/usb/cdns3/host.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
index 7ba760ee62e3310e9c678d269d7675c9cb952ec6..01a3d6aad12886096ab2833a7bc276467f08cb1a 100644
--- a/drivers/usb/cdns3/host.c
+++ b/drivers/usb/cdns3/host.c
@@ -138,6 +138,15 @@ static void cdns_host_exit(struct cdns *cdns)
cdns_drd_host_off(cdns);
}

+static int cdns_host_resume(struct cdns *cdns, bool lost_power)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(cdns->host_dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ xhci->lost_power = lost_power;
+ return 0;
+}
+
int cdns_host_init(struct cdns *cdns)
{
struct cdns_role_driver *rdrv;
@@ -148,6 +157,7 @@ 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";

--
2.47.1