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

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Date:	Mon, 24 Oct 2011 14:23:50 +0530
From:	Rajendra Nayak <rnayak@...com>
To:	Grant Likely <grant.likely@...retlab.ca>
CC:	Shawn Guo <shawn.guo@...escale.com>,
	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 Monday 24 October 2011 01:47 PM, Grant Likely wrote:
> On Mon, Oct 24, 2011 at 11:32:19AM +0530, Rajendra Nayak wrote:
>> On Friday 21 October 2011 05:28 PM, Shawn Guo wrote:
>>> On Fri, Oct 21, 2011 at 02:11:55PM +0530, Rajendra Nayak wrote:
>>> [...]
>>>>> +       /* find device_node and attach it */
>>>>> +       rdev->dev.of_node = of_find_node_by_name(NULL, regulator_desc->name);

Shawn/Mark,

How about the driver passing the of_node to be associated with the
regulator, as part of regulator_desc, to the regulator core,
instead of this complete DT search and the restriction of having
to match DT node names with names in regulator_desc.

regards,
Rajendra

>>>>
>>>> so would this do a complete dt search for every regulator?
>>>
>>> Yes, with the first param being NULL, tthe entire device tree will be
>>> searched.
>>>
>>>> we would also need the driver names and dt names to match for this to
>>>> work, right?
>>>>
>>> Driver name does not matter.  The key for this search to work is having
>>> regulator's name (regulator_desc->name) match device tree node's name,
>>> case ignored.
>>
>> Mark, whats your take on this? I am somehow not quite sure if we should
>> have this limitation put in to match DT node names with whats in the
>> driver structs (regulator_desc).
>
> This looks wrong to me.  Matching based on node /name/, particularly
> when searching the entire tree, will cause problems.
>
> g.

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