linux-kernel - Re: [PATCHv3 1/4] mfd: smsc: Add support for smsc gpio io/keypad driver

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Date:	Mon, 1 Oct 2012 13:09:07 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	"ABRAHAM, KISHON VIJAY" <kishon@...com>
Cc:	Sourav Poddar <sourav.poddar@...com>,
	devicetree-discuss@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	b-cousson@...com, balbi@...com, santosh.shilimkar@...com,
	sameo@...ux.intel.com
Subject: Re: [PATCHv3 1/4] mfd: smsc: Add support for smsc gpio io/keypad
 driver

On Mon, Oct 01, 2012 at 05:23:15PM +0530, ABRAHAM, KISHON VIJAY wrote:
> On Mon, Oct 1, 2012 at 5:14 PM, Mark Brown

> > No, this is not at all sensible - if there's an mfd_remove_devices()
> > function we really ought to be able to use it to remove the children.
> > If we can't do that we should fix the API usability, not open code the
> > same stuff in every user.

> What makes more sense to me is extend mfd_add_devices to create child
> devices from dt data. Then for removing devices, one can use
> mfd_remove_devices().

Why would that be helpful?  Most platforms don't support DT at all, and
having the API behave differently depending on the platform doesn't seem
like a step forwards.  I would really expect any usage of DT to be
totally orthogonal here.
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