linux-kernel - Re: [PATCH 07/21] ASoC: io: Prevent use of regmap if request fails

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Message-ID: <20120726114215.GB3099@opensource.wolfsonmicro.com>
Date:	Thu, 26 Jul 2012 12:42:16 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	STEricsson_nomadik_linux@...t.st.com, linus.walleij@...ricsson.com,
	arnd@...db.de, sameo@...ux.intel.com, olalilja@...oo.se,
	ola.o.lilja@...ricsson.com, alsa-devel@...a-project.org, lrg@...com
Subject: Re: [PATCH 07/21] ASoC: io: Prevent use of regmap if request fails

On Thu, Jul 26, 2012 at 12:38:17PM +0100, Lee Jones wrote:
> On 26/07/12 12:32, Mark Brown wrote:

> >Again, this makes no sense.  If we're explicitly being asked to use
> >regmap then we should be using regmap or just failing to set up I/O
> >(which is obviously a catastrophic failure).

> How much work is there involved in regmap:ing a device, so that
> dev_get_regmap() doesn't fail?

Trivial if it's on a supported bus, otherwise you just need to write the
bus.  But why do you care if dev_get_regmap() fails?  We only try to use
regmap if the driver asked for regmap I/O (or doesn't have registers at
all in which case it doesn't matter since we never do any I/O).  What
you appear to be saying here is that you're using regmap on a device
which doesn't have a regmap set up which is clearly never going to work
terribly well...

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