RE: [PATCH v11 08/14] usb: otg: add OTG/dual-role core

[Yoshihiro Shimoda]

Hi Roger,

> From: Roger Quadros
> Sent: Monday, June 20, 2016 7:13 PM
> 
> Hi,
> 
> On 20/06/16 10:45, Felipe Balbi wrote:
< snip >
> >> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> >> index f4fc0aa..1d74fb8 100644
> >> --- a/include/linux/usb/gadget.h
> >> +++ b/include/linux/usb/gadget.h
> >> @@ -328,6 +328,7 @@ struct usb_gadget_ops {
> >>   * @in_epnum: last used in ep number
> >>   * @mA: last set mA value
> >>   * @otg_caps: OTG capabilities of this gadget.
> >> + * @otg_dev: OTG controller device, if needs to be used with OTG core.
> >
> > do you really know of any platform which has a separate OTG controller?
> >
> 
> Andrew had pointed out in [1] that Tegra210 has separate blocks for OTG, host
> and gadget.
> 
> [1] http://article.gmane.org/gmane.linux.ports.tegra/22969
> 
> Yoshihiro,
> 
> How is the dual-role architecture on your Renesas platform?

About the dual-role architecture, Renesas platform (R-Car H3) has a USB 2.0 host controller (EHCI/OHCI)
with OTG function and a separate USB 2.0 peripheral controller (HS-USB).
The OTG function is related to some PHY control registers, so I intend to add the OTG/Dual-role core
support into the phy driver (drivers/phy/phy-rcar-gen3-usb2.c).

Best regards,
Yoshihiro Shimoda