linux-kernel - Re: (arm-)global platform device registration functions

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Message-Id: <201012301103.31085.arnd@arndb.de>
Date:	Thu, 30 Dec 2010 11:03:31 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	"Uwe Kleine-König" 
	<u.kleine-koenig@...gutronix.de>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	"Greg Kroah-Hartman" <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: (arm-)global platform device registration functions

On Wednesday 29 December 2010 17:25:12 Uwe Kleine-König wrote:
> some time ago I started to dynamically allocate platform_devices for
> arm/plat-mxc.  For that purpose I added many functions, see
> arch/arm/plat-mxc/include/mach/devices-common.h [1].  Now arm/arch-mxs
> want to do the same, so I wonder if it would be sensible to do something
> like this more globally (either for arm or better kernel global).

Adding platform devices dynamically is definitely the right way forward
for new platforms, as Greg explained recently. The imx_add_platform_device()
function you have defined looks useful for this, and I guess it could
be added globally, next to the existing platform_device_register_resndata,
platform_device_register_data and platform_device_register_simple functions
that we already have doing similar things.

I'm not convinced that the various wrappers you have on imx are the
best solution, though I have not come up with anything better either ;-)

This will also get a lot easier once we have the ability to define
devices in using dtc, because that takes care of the resources.

	Arnd
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