Re: Chipidea ULPI driver

[Felipe Balbi <balbi@ti.com>]

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On Thu, Sep 10, 2015 at 02:57:49PM +0000, Punnaiah Choudary Kalluri wrote:
> 
> 
> > -----Original Message-----
> > From: Felipe Balbi [mailto:balbi@ti.com]
> > Sent: Thursday, September 10, 2015 8:14 PM
> > To: Subbaraya Sundeep Bhatta
> > Cc: Peter Chen; balbi@ti.com; linux-usb@vger.kernel.org; linux-
> > kernel@vger.kernel.org; Greg Kroah-Hartman
> > (gregkh@linuxfoundation.org); kishon@ti.com; Punnaiah Choudary Kalluri
> > Subject: Re: Chipidea ULPI driver
> > 
> > (break your lines at 80-characters)
> > 
> > On Thu, Sep 10, 2015 at 12:44:58PM +0000, Subbaraya Sundeep Bhatta wrote:
> > > Hi Peter,
> > >
> > > We are using NOP transceiver driver for USB3320 ULPI PHY with ChipIdea
> > > controller.
> > >
> > > Recently we found that one of the boards (zedboard) requires PHY
> > > register access to set VBUS.
> > >
> > > Note that our local driver we had before migrating to ChipIdea driver
> > > calls otg_ulpi_create with flags  ULPI_OTG_DRVVBUS |
> > > ULPI_OTG_DRVVBUS_EXT so that VBUS is enabled at initialization.
> > >
> > > Can you please let me know how to do this with ChipIdea case? I see
> > > the following solutions:
> > >
> > > 1. Write ULPI driver for USB3320 similar to tusb1210.
> > 
> > this
> 
> How about extending the phy-ulpi driver to use it as platform driver?

this is already doable. See drivers/usb/phy/phy-am335x.c, see how it
uses nop as a library and just adds its own stuff on top.

-- 
balbi

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