linux-kernel - Re: [PATCH 4/8] minnowboard: Add base platform driver for the MinnowBoard

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Date:	Wed, 30 Oct 2013 14:36:02 -0700
From:	Mark Brown <broonie@...nel.org>
To:	Darren Hart <dvhart@...ux.intel.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Lee Jones <lee.jones@...aro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	"peter.p.waskiewicz.jr" <peter.p.waskiewicz.jr@...el.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	danders <danders@...cuitco.com>,
	"vishal.l.verma" <vishal.l.verma@...el.com>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Grant Likely <grant.likely@...aro.org>,
	Richard Purdie <richard.purdie@...uxfoundation.org>,
	platform-driver-x86 <platform-driver-x86@...r.kernel.org>
Subject: Re: [PATCH 4/8] minnowboard: Add base platform driver for the
 MinnowBoard

On Wed, Oct 30, 2013 at 02:18:00PM +0000, Darren Hart wrote:
> On Mon, 2013-07-22 at 00:41 +0100, Mark Brown wrote:

> > I'd expect it to be a bus, yes.

> It seems to me the platform bus already provides everything we need. We
> can just make a platform driver, say platform-id-gpio.c which can get
> it's platform data from OF or ACPI (_PRP proposal from kernel summit
> last week for example). Why would a separate bus type need to be
> defined?

For the identifier space.  We ought to be able to register handling for
plugin boards separately to notifying the system of their existance in a
similar fashion to how we register drivers for anything else.

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