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.