[PATCH v7] usb: ohci-at91: Forcibly suspend ports while USB suspend

[Alan Stern]

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 at atmel.com>
> Reviewed-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>
> Acked-by: Nicolas Ferre <nicolas.ferre at 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 at rowland.harvard.edu>