usb: chipidea: host: disable io watchdog

The Chipidea EHCI core seems to behave sanely and doesn't need
the IO watchdog. This kills off 10 non-deferrable wakeup events
per second when the controller is otherwise idle.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 053bac9d983cbd7b3e4d24ee9f227ec0ba909368..96ae69502c86fac5b1b2f7306f049d7f7bb5085f 100644 (file)
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -81,12 +81,15 @@ static int ehci_ci_reset(struct usb_hcd *hcd)
 {
        struct device *dev = hcd->self.controller;
        struct ci_hdrc *ci = dev_get_drvdata(dev);
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
        int ret;
 
        ret = ehci_setup(hcd);
        if (ret)
                return ret;
 
+       ehci->need_io_watchdog = 0;
+
        ci_platform_configure(ci);
 
        return ret;