linux-kernel - Re: [PATCH 01/15] drivers: phy: add generic PHY framework

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Message-ID: <20130723173454.GK9858@sirena.org.uk>
Date:	Tue, 23 Jul 2013 18:34:54 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Tomasz Figa <tomasz.figa@...il.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Sylwester Nawrocki <sylvester.nawrocki@...il.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	kyungmin.park@...sung.com, balbi@...com, jg1.han@...sung.com,
	s.nawrocki@...sung.com, kgene.kim@...sung.com,
	grant.likely@...aro.org, tony@...mide.com, arnd@...db.de,
	swarren@...dia.com, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-media@...r.kernel.org,
	linux-fbdev@...r.kernel.org, akpm@...ux-foundation.org,
	balajitk@...com, george.cherian@...com, nsekhar@...com,
	olof@...om.net, Stephen Warren <swarren@...dotorg.org>,
	b.zolnierkie@...sung.com,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: Re: [PATCH 01/15] drivers: phy: add generic PHY framework

On Tue, Jul 23, 2013 at 10:37:05AM -0400, Alan Stern wrote:
> On Tue, 23 Jul 2013, Tomasz Figa wrote:

> > > > Okay.  Are PHYs _always_ platform devices?

> > > They can be i2c, spi or any other device types as well.

> In those other cases, presumably there is no platform data associated
> with the PHY since it isn't a platform device.  Then how does the
> kernel know which controller is attached to the PHY?  Is this spelled
> out in platform data associated with the PHY's i2c/spi/whatever parent?

Platform data is nothing to do with the platform bus - it's board
specific data (ie, data for the platform) and can be done with any
device.

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