linux-kernel - Re: [PATCH v2 3/5] regulator: helper routine to extract regulator_init

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Message-ID: <20111025072003.GF2119@S2100-06.ap.freescale.net>
Date:	Tue, 25 Oct 2011 15:20:04 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Rajendra Nayak <rnayak@...com>
CC:	Grant Likely <grant.likely@...retlab.ca>,
	<broonie@...nsource.wolfsonmicro.com>, <patches@...aro.org>,
	<tony@...mide.com>, <devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<lrg@...com>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 3/5] regulator: helper routine to extract
 regulator_init_data

On Tue, Oct 25, 2011 at 12:26:01PM +0530, Rajendra Nayak wrote:
> On Tuesday 25 October 2011 12:22 PM, Shawn Guo wrote:
> >On Tue, Oct 25, 2011 at 11:30:19AM +0530, Rajendra Nayak wrote:
[...]
> >>Thats what we did for OMAP, and hence we always have the of_node
> >>populated when the regulator devices are probed.
> >>See this patch from Benoit on how thats done for twl devices..
> >>http://marc.info/?l=linux-omap&m=131489864814428&w=2
> >>
> >OMAP is "Case 1", and we are talking about "Case 2".
> 
> I don't see why it wouldn't work for "Case 2".

I did not say it wouldn't work for "Case 2".  I meant they work in
different way.

> The only difference
> is in case of "Case 1", the dev->of_node would already point to
> the right regulator node, like 'reg1', 'reg2' above.
> In case of "Case 2", the dev->of_node would point to the 'regulators'
> node instead, and the driver could then do a for_each_child_of_node()
> to iterate over all its children to get 'reg1', 'reg2' etc.
> 
Yes, that's the difference.  So you will need to distinguish these
two cases in regulator_register()?  How?

-- 
Regards,
Shawn

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