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USB: host: ohci-at91: suspend: delay needed before to stop clocks 

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>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20190911064154.28633-3-nicolas.ferre@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicolas Ferre 2019-09-11 08:41:53 +02:00 committed by Greg Kroah-Hartman
parent 9c4567fa0a
commit a3bf4d6816
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/host/ohci-at91.c
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@ -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);
}