linux-kernel - Re: regmap different register size

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Message-ID: <20150526192707.GA28895@wernerandy.de>
Date:	Tue, 26 May 2015 21:27:07 +0200
From:	Andreas Werner <andy@...nerandy.de>
To:	Felipe Balbi <balbi@...com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: regmap different register size

On Tue, May 26, 2015 at 02:00:39PM -0500, Felipe Balbi wrote:
> Hi,
> 
> On Tue, May 26, 2015 at 08:54:25PM +0200, Andreas Werner wrote:
> > i have a question regarding regmap usage.
> > 
> > I have a i2c multifunction device which does have a register and value
> > width of 8bits except the revision register. The revision can only be
> > read by a i2c block transfer.
> 
> read revision during probe using i2c block transfer, cache the value in
> your own driver structure and all subsequent reads just return the
> cached value. Everything else should be ok via regmap. This is first
> thing that came to mind, maybe there's a better way.
> 
> -- 
> balbi

This is what I want to do yes and i think this would be the only way to do it
because there is no mechanism to handle different register sizes with regmap.

Regards
Andy
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