This patch fixes an issue that suspend/resume cannot work correctly
on xhci-rcar because the xhci driver output the following log:
xhci-hcd ee000000.usb: WARN: xHC CMD_RUN timeout
So, this patch adds to set the XHCI_SLOW_SUSPEND quirk if xhci-rcar.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
This patch is based on the Greg's usb.git / usb-next branch.
(commit id : 4ed9a3d455558406cad83d38764ee659de25851c)
drivers/usb/host/xhci-plat.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 3d78b0c..a266883 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -27,12 +27,18 @@ static struct hc_driver __read_mostly xhci_plat_hc_driver;
static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
+ struct device_node *of_node = dev->of_node;
/*
* As of now platform drivers don't provide MSI support so we ensure
* here that the generic code does not try to make a pci_dev from our
* dev struct in order to setup MSI
*/
xhci->quirks |= XHCI_PLAT;
+
+ /* QUIRK: R-Car xHCI must be suspended extra slowly */
+ if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
+ of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
+ xhci->quirks |= XHCI_SLOW_SUSPEND;
}
/* called during probe() after chip reset completes */
--
1.7.9.5
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