linux-kernel - Re: [PATCH 4/9] usb: phy: add the Berlin USB PHY driver

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Message-ID: <20140619134545.GB23782@saruman.home>
Date:	Thu, 19 Jun 2014 08:45:45 -0500
From:	Felipe Balbi <balbi@...com>
To:	Vivek Gautam <gautam.vivek@...sung.com>
CC:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>, kishon <kishon@...com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Felipe Balbi <balbi@...com>,
	<alexandre.belloni@...e-electrons.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	zhiming Xu <zmxu@...vell.com>, <jszhang@...vell.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux USB Mailing List <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/9] usb: phy: add the Berlin USB PHY driver

On Fri, Jun 06, 2014 at 04:32:03PM +0530, Vivek Gautam wrote:
> Hi,
> 
> On Fri, Jun 6, 2014 at 12:41 PM, Antoine Ténart
> <antoine.tenart@...e-electrons.com> wrote:
> > Hi,
> >
> > On Fri, Jun 06, 2014 at 12:09:06PM +0530, Vivek Gautam wrote:
> >> On Thu, Jun 5, 2014 at 9:18 PM, Antoine Ténart
> >> <antoine.tenart@...e-electrons.com> wrote:
> >> > Add the driver driving the Marvell Berlin USB PHY. This allows to
> >> > initialize the PHY and to use it from the USB driver later.
> >>
> >> Just out of curiosity, going forward we would like to have phy drivers based on
> >> generic phy framework (drivers/phy).
> >> Any particular reason that we are still adding phy drivers in usb-phy layer ?
> >>
> >> Looking at it, seems like it can very well be written based on phy framework.
> >
> > This USB controller are ChipIdea compatible, and the ChipIdea common
> > functions use the usb_phy framework. That's why this PHY driver is
> > there.
> 
> Ok, i see that now. In that case shouldn't we be moving even the chipidea
> drivers to use the generic phy functions to get the phy and init/exit it.

yes, we should :-)

> I think Felipe and Kishon can comment on this better, and tell how
> things should be. :-)

yeah, this will just make it a little more difficult to deprecate
current usb phy layer.

-- 
balbi

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