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

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Date:	Mon, 24 Oct 2011 21:47:28 +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 Mon, Oct 24, 2011 at 02:43:58PM +0530, Rajendra Nayak wrote:
> Case 2:
> One device for all regulators:
> 
> DT nodes look something like this
> 
> regulators {
> 	reg1: reg@1 {
> 			...
> 			...
> 	};
> 
> 	reg2: reg@2 {
> 			...
> 			...
> 	};
> };
> 
> The regulator driver probes only one device and the dev->of_node
> points to the "regulators" node above.

The mc13892 example I put in the reply to Grant demonstrates that
for some case, dev->of_node is NULL (devices are created by mfd core).

> The regulator driver then based on compatible property extracts
> and registers all the child nodes of "regulators" (for ex: reg1, reg2
> above) with each call to regulator_register and passes the child nodes
> as of_node to be associated with the regulator device.
> 
I still think the discovery of all the child nodes of "regulators" does
not necessarily need to be done in regulator driver.  Instead, it can
be done in regulator core.

-- 
Regards,
Shawn

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