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

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Date:	Thu, 26 Jul 2012 15:51:13 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
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 26/07/12 12:42, Mark Brown wrote:
> 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...

I don't think we want to use regmap at all, but we're forced to by 
soc-core. How do we over-ride that behavior? By writing some nonsense 
into codec->control_data?


-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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