linux-kernel - Re: [PATCH v6 07/12] usb: chipidea: add a usb2 driver for ci13xxx

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Date:	Wed, 24 Sep 2014 10:30:41 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Peter Chen <peter.chen@...escale.com>
Cc:	balbi@...com, Antoine Tenart <antoine.tenart@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	sebastian.hesselbarth@...il.com, p.zabel@...gutronix.de,
	thomas.petazzoni@...e-electrons.com, zmxu@...vell.com,
	devicetree@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, alexandre.belloni@...e-electrons.com,
	jszhang@...vell.com
Subject: Re: [PATCH v6 07/12] usb: chipidea: add a usb2 driver for ci13xxx

On Wednesday 24 September 2014 09:44:19 Arnd Bergmann wrote:
> 
> We can also gradually move in some of the other glue drivers into
> the main driver if the differences are small enough.
> 

FWIW, I've just looked at the other glue drivers that already
exist:

- zevio can just get merged into the common driver, all that seems
  to be needed for that is the additional compatible string, and
  keying off the ci_default_zevio_platdata on the .data field of
  the of_device_id table.

- msm has a custom notifier, which justifies leaving it in a separate
  driver, but it's also small enough that it wouldn't hurt to have
  that merged into the main driver too.

- imx requires a lot of other things, in particular the dependency
  on the usbmisc driver means we don't want to have that in the
  core anyway, so we can't really merge that in.

- the proposed ar933x driver again looks almost trivial, so no reason
  for a separate glue driver for that.

	Arnd
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