linux-kernel - Re: [PATCH 3/3] phy: ulpi: add driver for TI TUSB1210

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Message-ID: <20150123082348.GC30522@kuha.fi.intel.com>
Date:	Fri, 23 Jan 2015 10:23:48 +0200
From:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:	Felipe Balbi <balbi@...com>
Cc:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Baolu Lu <baolu.lu@...ux.intel.com>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] phy: ulpi: add driver for TI TUSB1210

On Thu, Jan 22, 2015 at 02:51:24PM -0600, Felipe Balbi wrote:
> On Wed, Jan 21, 2015 at 01:39:58PM +0200, Heikki Krogerus wrote:
> > Hi,
> > 
> > On Wed, Jan 21, 2015 at 11:17:49AM +0200, Heikki Krogerus wrote:
> > > On Tue, Jan 20, 2015 at 09:45:39AM -0600, Felipe Balbi wrote:
> > > > > diff --git a/drivers/phy/ulpi/tusb1210.c b/drivers/phy/ulpi/tusb1210.c
> > > > > new file mode 100644
> > > > > index 0000000..ac77f98
> > > > > --- /dev/null
> > > > > +++ b/drivers/phy/ulpi/tusb1210.c
> > > > 
> > > > do you really need this extra ulpi directory ?
> > > > 
> > > > I wonder if phy-tusb1210.c as a name would be enough.
> > > 
> > > IMO grouping the ULPI PHY drivers and other ULPI bus code into
> > > separate folder from the start is the right thing to do.
> > 
> > A correction to this comment. I probable don't need this folder. Like
> > you said, phy-tusb1210.c should be enough..
> > 
> > <snip>
> > 
> > > > In fact, we might decide to add an entire ULPI bus, eventually, though
> > > > I'm still considering if there's any benefit to that.
> > > 
> > > I don't think I understand this comment? ULPI bus is what I'm
> > > introducing in this set (the first patch in it)?
> > 
> > ..I talked with Alex about this :). So I think the bus belongs under
> > drivers/usb/core/ instead of driver/phy/. It's not really tied to the
> > Generic PHY framework in any way, but ULPI is of course USB specific.
> 
> right, maybe drivers/usb/ulpi or maybe drivers/ulpi, and have
> phy-tusb1201 register under that ulpi_bus_type instead of
> platform_bus_type, but still use drivers/phy to register itself a phy
> provider ;-)

So just for the record: This driver does not register under
platform_bus_type bus but instead already under ulpi_bus_type.

I'll prepare new version out of these today and try to figure out
proper place for the code (maybe drivers/usb/ulpi?).


Cheers,

-- 
heikki
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