linux-kernel - Re: [PATCH 2/4] Input: pmic8xxx-keypad - use regmap

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Date:	Mon, 27 Oct 2014 17:30:41 +0200
From:	"Ivan T. Ivanov" <iivanov@...sol.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Mark Brown <broonie@...nel.org>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/4] Input: pmic8xxx-keypad - use regmap_field for
 register access


Hi Dmitry, 

On Mon, 2014-10-13 at 16:02 +0200, Mark Brown wrote:
> On Wed, Oct 08, 2014 at 01:32:33PM -0700, Dmitry Torokhov wrote:
> > On Wed, Oct 08, 2014 at 09:04:26PM +0100, Mark Brown wrote:
> > > On Wed, Oct 08, 2014 at 11:20:58AM -0700, Stephen Boyd wrote:
> 
> > > > Srini/Mark, any reason why the regmap_field structure is opaque?
> 
> > > So you can't peer into it and rely on the contents.  I can see it being
> > > useful to add a bulk allocator.
> 
> > And then one have to define offsets in an array and use awkward syntax
> > to access individual fields. Can we just reply on reviews/documentation
> > for users to not do wrong thing?
> 
> I have very little confidence in users not doing awful things to be
> honest, this is the sort of API where the users are just random things
> all over the kernel so this sort of thing tends to be found after the
> fact.  I get a lot of these in drivers that just got thrown over the
> wall so nobody really knows what things are doing when you do find them.
> 
> If the standard allocators aren't doing a good job (I've not checked)
> I'd much rather handle this inside the API if we can.
> 

Is there something that I can help here or patches are good as they are? :-)

Regards,
Ivan
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