linux-kernel - Re: [PATCH] regulator: ti-abb: Add support for interleaved LDO registers

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Message-ID: <20140117183853.GD17314@sirena.org.uk>
Date:	Fri, 17 Jan 2014 18:38:53 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Nishanth Menon <nm@...com>
Cc:	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: ti-abb: Add support for interleaved LDO
 registers

On Fri, Jan 17, 2014 at 12:11:44PM -0600, Nishanth Menon wrote:
> On 01/17/2014 12:00 PM, Mark Brown wrote:

> > That sounds exactly like a system controller :)

> Hmm.. I have considered something like PRCM in OMAP as a system
> controller... anyways.. I think I miss your suggestion here. Is there
> something you might suggest to improve in the patch or take an
> alternative route?

What people have done for these things is have a device for the
controller that maps the registers and then have the other devices talk
through that to get the access they need.  You still need to specify
which interrupts but it's simpler with the I/O mapping and is needed for
arbitration if the hardware has register bits for multiple functions in
the same register.

Not thought enough about the patch itself yet, that's more a separate
thing.

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