Messages in this thread Patch in this message | | | From | Nicolas Ferre <> | Subject | [PATCH 2/3] USB: host: ohci-at91: suspend: delay needed before to stop clocks | Date | Wed, 11 Sep 2019 08:41:53 +0200 |
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In order to completely remove marginal power consumption in PM suspend, we need to let the controller settle down before being stopped. In ohci_hcd_at91_drv_suspend() function, one additional delay is needed before to stop the clocks.
Reported-by: Boris Krasnovskiy <Boris.Krasnovskiy@lairdconnect.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> --- drivers/usb/host/ohci-at91.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index cb63bcd5049a..85d67fe42d59 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -628,6 +628,7 @@ ohci_hcd_at91_drv_suspend(struct device *dev) /* flush the writes */ (void) ohci_readl (ohci, &ohci->regs->control); + msleep(1); at91_stop_clock(ohci_at91); } -- 2.17.1
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