linux-kernel - Re: [PATCH 2/2] regmap: Allow caches for devices with no defaults

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Date:	Mon, 10 Oct 2011 11:50:19 +0100
From:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com
Subject: Re: [PATCH 2/2] regmap: Allow caches for devices with no defaults

On Mon, Oct 10, 2011 at 10:23:46AM +0100, Mark Brown wrote:
> On Mon, Oct 10, 2011 at 09:41:26AM +0100, Dimitris Papastamos wrote:
> > On Sun, Oct 09, 2011 at 02:44:36PM +0100, Mark Brown wrote:
> 
> > > +	} else if (map->num_reg_defaults_raw) {
> > >  		/* Some devices such as PMICs don't have cache defaults,
> > >  		 * we cope with this by reading back the HW registers and
> > >  		 * crafting the cache defaults by hand.
> 
> > We could probably then also remove the first check in
> > regcache_hw_init() I guess.
> 
> > The one:
> 
> > if (!map->num_reg_defaults_raw)
> > 	return -EINVAL;
> 
> I felt it was clearer to have the defaults init fail if it doesn't work
> so that the callers know what happened.  Otherwise the callers have to
> figure out if it succeeded because it did what it was supposed to.

Aw right yes.

Acked-by: Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
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