[PATCH] ARM: dts: imx51-babbage: Fix ULPI PHY reset modelling

[Lucas Stach]

Am Dienstag, den 06.01.2015, 11:47 -0200 schrieb Fabio Estevam:
> On Tue, Jan 6, 2015 at 11:36 AM, Lucas Stach <l.stach at pengutronix.de> wrote:
> 
> > For the record:
> > I'm not happy with this patch. It still abuses the regulator API for
> > something completely unrelated and this may well break again in the
> > future. But given that it fixes an actual regression and you already
> > sent a pull including this I'm okay to keep it.
> >
> > We still need a proper fix to handle ULPI resets to get rid of this
> > hackery.
> 
> Actually the ULPI PHY reset is properly handled now. What is missing
> is the USB Hub reset to be properly handled.
> 
No it is not. A regulator isn't the proper abstraction for a reset at
all. Even if you (ab)use the regulator drivers ability to toggle a reset
GPIO.
A ULPI PHY reset needs to be modeled as a GPIO reset attached to USB
controller node. There is no other way to describe the hardware
accurately.

Regards,
Lucas

-- 
Pengutronix e.K.             | Lucas Stach                 |
Industrial Linux Solutions   | http://www.pengutronix.de/  |