linux-kernel - Re: [Q] .readable_reg() not verified during read?

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Date:	Mon, 29 Oct 2012 08:40:55 +0100 (CET)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: [Q] .readable_reg() not verified during read?

On Sun, 28 Oct 2012, Mark Brown wrote:

> On Sun, Oct 28, 2012 at 12:36:40AM +0200, Guennadi Liakhovetski wrote:
> 
> > Looking at regmap.c it looks like the .readable_reg() callback is not 
> > consulted when performing a register read, e.g. in _regmap_raw_read(). Is 
> > this intentional? If yes - why?
> 
> No real reason, though to be honest it's not that important - the main
> reason for having the function is to make the debugfs stuff work nicely
> rather than anything else.

But what about initialising the register cache in regcache_hw_init()? 
Doesn't it read in all registers without checking their readability?

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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