The cdns3 host role does not care about reset-on-resume. xHCI however
reconfigures itself in silence rather than printing a warning about a
resume error. Related warning example:
[ 16.017462] xhci-hcd xhci-hcd.1.auto: xHC error in resume, USBSTS 0x401, Reinit
Allow passing a CDNS3_RESET_ON_RESUME quirk flag from cdns3 pdata down
to xHCI pdata. The goal is to allow signaling about reset-on-resume
behavior from platform wrapper drivers.
When used, remote wakeup is not expected to work.
Acked-by: Peter Chen <peter.chen@xxxxxxxxxx>
Signed-off-by: Théo Lebrun <theo.lebrun@xxxxxxxxxxx>
---
drivers/usb/cdns3/core.h | 1 +
drivers/usb/cdns3/host.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
index 81a9c9d6be08..7487067ba23f 100644
--- a/drivers/usb/cdns3/core.h
+++ b/drivers/usb/cdns3/core.h
@@ -44,6 +44,7 @@ struct cdns3_platform_data {
bool suspend, bool wakeup);
unsigned long quirks;
#define CDNS3_DEFAULT_PM_RUNTIME_ALLOW BIT(0)
+#define CDNS3_RESET_ON_RESUME BIT(1)
};
/**
diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
index 6164fc4c96a4..28c4d1deb231 100644
--- a/drivers/usb/cdns3/host.c
+++ b/drivers/usb/cdns3/host.c
@@ -91,6 +91,9 @@ static int __cdns_host_init(struct cdns *cdns)
if (cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
+ if (cdns->pdata && (cdns->pdata->quirks & CDNS3_RESET_ON_RESUME))
+ cdns->xhci_plat_data->quirks |= XHCI_RESET_ON_RESUME;
+
ret = platform_device_add_data(xhci, cdns->xhci_plat_data,
sizeof(struct xhci_plat_priv));
if (ret)
--
2.43.2
