Messages in this thread | | | Date | Tue, 23 Aug 2016 11:30:04 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [PATCH v7] usb: ohci-at91: Forcibly suspend ports while USB suspend |
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On Tue, 23 Aug 2016, Wenyou Yang wrote:
> The usb controller does not manage correctly the suspend mode for > the ehci. In echi mode, there is no way to suspend without any > device connected to it. This is why this specific control is added > to fix this issue. Since the suspend mode works in ohci mode, this > specific control works by suspend the usb controller in ohci mode. > > This specific control is by setting the SUSPEND_A/B/C fields of > SFR_OHCIICR(OHCI Interrupt Configuration Register) in the SFR > while the OHCI USB suspend. > > This set operation must be done before the USB clock disabled, > clear operation after the USB clock enabled. > > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> > Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> > Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> > --- > > Changes in v7: > - Rename ohci_at91_port_ctrl() to ohci_at91_port_suspend(). > - Add check valid_port(wIndex) before invoke > ohci_at91_port_suspend(). > - Call ohci_at91_port_suspend() directly on suspend/resume > operations.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
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