From: Rajendra Nayak <rnayak@ti.com>
To: Shawn Guo <shawn.guo@freescale.com>
Cc: Grant Likely <grant.likely@secretlab.ca>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
patches@linaro.org, tony@atomide.com,
devicetree-discuss@lists.ozlabs.org,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
lrg@ti.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 3/5] regulator: helper routine to extract regulator_init_data
Date: Tue, 25 Oct 2011 11:40:34 +0530 [thread overview]
Message-ID: <4EA652DA.5050901@ti.com> (raw)
In-Reply-To: <20111024155132.GI1755@S2100-06.ap.freescale.net>
On Monday 24 October 2011 09:21 PM, Shawn Guo wrote:
> On Mon, Oct 24, 2011 at 04:56:31PM +0200, Grant Likely wrote:
>> On Mon, Oct 24, 2011 at 10:51:40PM +0800, Shawn Guo wrote:
>>> On Mon, Oct 24, 2011 at 03:59:50PM +0200, Grant Likely wrote:
>>>> On Mon, Oct 24, 2011 at 09:40:26PM +0800, Shawn Guo wrote:
>>>>> diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
>>>>> index 8fe132d..29dcf90 100644
>>>>> --- a/drivers/regulator/core.c
>>>>> +++ b/drivers/regulator/core.c
>>>>> @@ -2673,7 +2673,8 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
>>>>> BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier);
>>>>>
>>>>> /* find device_node and attach it */
>>>>> - rdev->dev.of_node = of_find_node_by_name(NULL, regulator_desc->name);
>>>>> + rdev->dev.of_node = of_find_node_by_name(dev->parent->of_node,
>>>>> + regulator_desc->name);
>>>>
>>>> of_find_node_by_name() doesn't work that way. The first argument is a
>>>> starting point, but it doesn't restrict the search to children of a
>>>> node.
>>>>
>>>> for_each_child_of_node() is what you want to use when iterating over
>>>> the children which unfortunately changes the structure of this
>>>> function.
>>>>
>>> The dev->parent->of_node is meant to point to node 'pmic: mc13892@0'.
>>> And the intention here is not to iterate over the children, but to
>>> start a search from a reasonable point rather than the top root node.
>>
>> It is always better to attach the of_node at struct device
>> registration time instead of searching the tree in common code. The
>> of_node should already be assigned by the time regulator_register() is
>> called.
>
> That's the problem we have. There is no 'struct dev' to attach of_node
> for each regulator by the time regulator_register() is called, because
> the 'struct dev' for each regulator is created inside
> regulator_register() as wrapped by 'struct regulator_dev'.
The root of your problem seems to be that your pmic driver isn't
registering regulator devices from DT, and if it did, you wouldn't
need to do a search in dev->parent->of_node and instead the driver
would have the right dev->of_node populated.
>
WARNING: multiple messages have this Message-ID (diff)
From: rnayak@ti.com (Rajendra Nayak)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 3/5] regulator: helper routine to extract regulator_init_data
Date: Tue, 25 Oct 2011 11:40:34 +0530 [thread overview]
Message-ID: <4EA652DA.5050901@ti.com> (raw)
In-Reply-To: <20111024155132.GI1755@S2100-06.ap.freescale.net>
On Monday 24 October 2011 09:21 PM, Shawn Guo wrote:
> On Mon, Oct 24, 2011 at 04:56:31PM +0200, Grant Likely wrote:
>> On Mon, Oct 24, 2011 at 10:51:40PM +0800, Shawn Guo wrote:
>>> On Mon, Oct 24, 2011 at 03:59:50PM +0200, Grant Likely wrote:
>>>> On Mon, Oct 24, 2011 at 09:40:26PM +0800, Shawn Guo wrote:
>>>>> diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
>>>>> index 8fe132d..29dcf90 100644
>>>>> --- a/drivers/regulator/core.c
>>>>> +++ b/drivers/regulator/core.c
>>>>> @@ -2673,7 +2673,8 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
>>>>> BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier);
>>>>>
>>>>> /* find device_node and attach it */
>>>>> - rdev->dev.of_node = of_find_node_by_name(NULL, regulator_desc->name);
>>>>> + rdev->dev.of_node = of_find_node_by_name(dev->parent->of_node,
>>>>> + regulator_desc->name);
>>>>
>>>> of_find_node_by_name() doesn't work that way. The first argument is a
>>>> starting point, but it doesn't restrict the search to children of a
>>>> node.
>>>>
>>>> for_each_child_of_node() is what you want to use when iterating over
>>>> the children which unfortunately changes the structure of this
>>>> function.
>>>>
>>> The dev->parent->of_node is meant to point to node 'pmic: mc13892 at 0'.
>>> And the intention here is not to iterate over the children, but to
>>> start a search from a reasonable point rather than the top root node.
>>
>> It is always better to attach the of_node at struct device
>> registration time instead of searching the tree in common code. The
>> of_node should already be assigned by the time regulator_register() is
>> called.
>
> That's the problem we have. There is no 'struct dev' to attach of_node
> for each regulator by the time regulator_register() is called, because
> the 'struct dev' for each regulator is created inside
> regulator_register() as wrapped by 'struct regulator_dev'.
The root of your problem seems to be that your pmic driver isn't
registering regulator devices from DT, and if it did, you wouldn't
need to do a search in dev->parent->of_node and instead the driver
would have the right dev->of_node populated.
>
next prev parent reply other threads:[~2011-10-25 6:10 UTC|newest]
Thread overview: 238+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 16:19 [PATCH v2 0/5] Device tree support for regulators Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` [PATCH v2 2/5] dt: add empty dt helpers for non-dt build Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-13 18:32 ` Grant Likely
2011-10-13 18:32 ` Grant Likely
[not found] ` <1318263578-7407-1-git-send-email-rnayak-l0cyMroinI0@public.gmane.org>
2011-10-10 16:19 ` [PATCH v2 1/5] regulator: twl: Remove hardcoded board constraints from driver Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:25 ` Mark Brown
2011-10-10 16:25 ` Mark Brown
2011-10-10 16:34 ` Rajendra Nayak
2011-10-10 16:34 ` Rajendra Nayak
2011-10-10 16:19 ` [PATCH v2 3/5] regulator: helper routine to extract regulator_init_data Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 17:22 ` Mark Brown
2011-10-10 17:22 ` Mark Brown
2011-10-10 17:22 ` Mark Brown
2011-10-11 5:59 ` Rajendra Nayak
2011-10-11 5:59 ` Rajendra Nayak
2011-10-13 18:38 ` Grant Likely
2011-10-13 18:38 ` Grant Likely
2011-10-13 18:38 ` Grant Likely
2011-10-13 22:12 ` Mark Brown
2011-10-13 22:12 ` Mark Brown
2011-10-13 22:12 ` Mark Brown
2011-10-13 18:40 ` Grant Likely
2011-10-13 18:40 ` Grant Likely
2011-10-13 18:40 ` Grant Likely
2011-10-16 14:55 ` Shawn Guo
2011-10-16 14:55 ` Shawn Guo
2011-10-16 14:55 ` Shawn Guo
2011-10-17 4:17 ` Rajendra Nayak
2011-10-17 4:17 ` Rajendra Nayak
2011-10-18 11:58 ` Shawn Guo
2011-10-18 11:58 ` Shawn Guo
2011-10-18 11:58 ` Shawn Guo
[not found] ` <20111018115836.GC30703-+NayF8gZjK2ctlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org>
2011-10-18 16:00 ` Mark Brown
2011-10-18 16:00 ` Mark Brown
2011-10-18 16:00 ` Mark Brown
2011-10-19 5:33 ` Shawn Guo
2011-10-19 5:33 ` Shawn Guo
2011-10-19 5:33 ` Shawn Guo
[not found] ` <20111019053354.GB31162-+NayF8gZjK2ctlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org>
2011-10-19 14:47 ` Mark Brown
2011-10-19 14:47 ` Mark Brown
2011-10-19 14:47 ` Mark Brown
2011-10-19 15:04 ` Shawn Guo
2011-10-19 15:04 ` Shawn Guo
2011-10-19 15:04 ` Shawn Guo
2011-10-19 15:10 ` Mark Brown
2011-10-19 15:10 ` Mark Brown
2011-10-20 3:42 ` Rajendra Nayak
2011-10-20 3:42 ` Rajendra Nayak
[not found] ` <4E9F9892.9070007-l0cyMroinI0@public.gmane.org>
2011-10-20 9:41 ` Mark Brown
2011-10-20 9:41 ` Mark Brown
2011-10-20 9:41 ` Mark Brown
[not found] ` <20111020094140.GK18713-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2011-10-20 12:10 ` Rajendra Nayak
2011-10-20 12:10 ` Rajendra Nayak
2011-10-20 12:10 ` Rajendra Nayak
2011-10-20 16:27 ` Tony Lindgren
2011-10-20 16:27 ` Tony Lindgren
2011-10-20 16:27 ` Tony Lindgren
[not found] ` <20111020162743.GB31337-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2011-10-20 16:40 ` Mark Brown
2011-10-20 16:40 ` Mark Brown
2011-10-20 16:40 ` Mark Brown
2011-10-20 17:05 ` Tony Lindgren
2011-10-20 17:05 ` Tony Lindgren
2011-10-20 17:22 ` Tony Lindgren
2011-10-20 17:22 ` Tony Lindgren
2011-10-20 19:57 ` Mark Brown
2011-10-20 19:57 ` Mark Brown
2011-10-20 20:10 ` Tony Lindgren
2011-10-20 20:10 ` Tony Lindgren
2011-10-20 21:42 ` Mark Brown
2011-10-20 21:42 ` Mark Brown
2011-10-20 22:09 ` Tony Lindgren
2011-10-20 22:09 ` Tony Lindgren
2011-10-24 9:07 ` Grant Likely
2011-10-24 9:07 ` Grant Likely
2011-10-20 19:56 ` Mark Brown
2011-10-20 19:56 ` Mark Brown
2011-10-18 13:20 ` Shawn Guo
2011-10-18 13:20 ` Shawn Guo
2011-10-18 13:20 ` Shawn Guo
2011-10-19 11:35 ` Rajendra Nayak
2011-10-19 11:35 ` Rajendra Nayak
2011-10-19 11:35 ` Rajendra Nayak
2011-10-19 14:42 ` Shawn Guo
2011-10-19 14:42 ` Shawn Guo
2011-10-19 14:42 ` Shawn Guo
2011-10-19 14:50 ` Mark Brown
2011-10-19 14:50 ` Mark Brown
2011-10-19 14:50 ` Mark Brown
[not found] ` <20111019144215.GA32007-+NayF8gZjK2ctlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org>
2011-10-20 5:18 ` Rajendra Nayak
2011-10-20 5:18 ` Rajendra Nayak
2011-10-20 5:18 ` Rajendra Nayak
2011-10-20 6:14 ` Shawn Guo
2011-10-20 6:14 ` Shawn Guo
2011-10-20 6:14 ` Shawn Guo
2011-10-20 12:09 ` Rajendra Nayak
2011-10-20 12:09 ` Rajendra Nayak
2011-10-20 12:09 ` Rajendra Nayak
2011-10-21 8:23 ` Shawn Guo
2011-10-21 8:23 ` Shawn Guo
2011-10-21 8:23 ` Shawn Guo
2011-10-21 8:41 ` Rajendra Nayak
2011-10-21 8:41 ` Rajendra Nayak
2011-10-21 11:58 ` Shawn Guo
2011-10-21 11:58 ` Shawn Guo
2011-10-21 11:58 ` Shawn Guo
2011-10-24 6:02 ` Rajendra Nayak
2011-10-24 6:02 ` Rajendra Nayak
2011-10-24 7:34 ` Mark Brown
2011-10-24 7:34 ` Mark Brown
2011-10-24 8:17 ` Grant Likely
2011-10-24 8:17 ` Grant Likely
2011-10-24 8:17 ` Grant Likely
2011-10-24 8:53 ` Rajendra Nayak
2011-10-24 8:53 ` Rajendra Nayak
2011-10-24 8:53 ` Rajendra Nayak
2011-10-24 9:19 ` Mark Brown
2011-10-24 9:19 ` Mark Brown
2011-10-24 9:19 ` Mark Brown
2011-10-24 10:05 ` Rajendra Nayak
2011-10-24 10:05 ` Rajendra Nayak
2011-10-24 9:23 ` Shawn Guo
2011-10-24 9:23 ` Shawn Guo
2011-10-24 9:23 ` Shawn Guo
2011-10-24 9:02 ` Shawn Guo
2011-10-24 9:02 ` Shawn Guo
2011-10-24 9:02 ` Shawn Guo
2011-10-24 8:56 ` Rajendra Nayak
2011-10-24 8:56 ` Rajendra Nayak
2011-10-24 9:11 ` Shawn Guo
2011-10-24 9:11 ` Shawn Guo
2011-10-24 9:11 ` Shawn Guo
2011-10-24 9:13 ` Rajendra Nayak
2011-10-24 9:13 ` Rajendra Nayak
2011-10-24 13:47 ` Shawn Guo
2011-10-24 13:47 ` Shawn Guo
2011-10-24 13:47 ` Shawn Guo
2011-10-25 6:00 ` Rajendra Nayak
2011-10-25 6:00 ` Rajendra Nayak
2011-10-25 6:00 ` Rajendra Nayak
2011-10-25 6:26 ` Rajendra Nayak
2011-10-25 6:26 ` Rajendra Nayak
2011-10-25 6:26 ` Rajendra Nayak
2011-10-25 6:52 ` Shawn Guo
2011-10-25 6:52 ` Shawn Guo
2011-10-25 6:52 ` Shawn Guo
[not found] ` <20111025065216.GD2119-+NayF8gZjK2ctlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org>
2011-10-25 6:56 ` Rajendra Nayak
2011-10-25 6:56 ` Rajendra Nayak
2011-10-25 6:56 ` Rajendra Nayak
2011-10-25 7:20 ` Shawn Guo
2011-10-25 7:20 ` Shawn Guo
2011-10-25 7:20 ` Shawn Guo
2011-10-25 7:13 ` Rajendra Nayak
2011-10-25 7:13 ` Rajendra Nayak
2011-10-25 7:13 ` Rajendra Nayak
2011-10-25 7:42 ` Shawn Guo
2011-10-25 7:42 ` Shawn Guo
2011-10-25 7:42 ` Shawn Guo
2011-10-24 11:35 ` Grant Likely
2011-10-24 11:35 ` Grant Likely
2011-10-24 9:24 ` Grant Likely
2011-10-24 9:24 ` Grant Likely
2011-10-24 9:24 ` Grant Likely
2011-10-24 9:39 ` Mark Brown
2011-10-24 9:39 ` Mark Brown
2011-10-24 13:04 ` Shawn Guo
2011-10-24 13:04 ` Shawn Guo
2011-10-24 13:04 ` Shawn Guo
2011-10-24 13:06 ` Mark Brown
2011-10-24 13:06 ` Mark Brown
2011-10-24 13:40 ` Shawn Guo
2011-10-24 13:40 ` Shawn Guo
2011-10-24 13:40 ` Shawn Guo
2011-10-24 13:49 ` Mark Brown
2011-10-24 13:49 ` Mark Brown
2011-10-24 14:47 ` Shawn Guo
2011-10-24 14:47 ` Shawn Guo
2011-10-24 14:47 ` Shawn Guo
[not found] ` <20111024144716.GG1755-+NayF8gZjK2ctlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org>
2011-10-25 7:11 ` Mark Brown
2011-10-25 7:11 ` Mark Brown
2011-10-25 7:11 ` Mark Brown
2011-10-24 13:59 ` Grant Likely
2011-10-24 13:59 ` Grant Likely
2011-10-24 13:59 ` Grant Likely
2011-10-24 14:51 ` Shawn Guo
2011-10-24 14:51 ` Shawn Guo
2011-10-24 14:51 ` Shawn Guo
2011-10-24 14:56 ` Grant Likely
2011-10-24 14:56 ` Grant Likely
2011-10-24 15:51 ` Shawn Guo
2011-10-24 15:51 ` Shawn Guo
2011-10-24 15:51 ` Shawn Guo
2011-10-24 22:21 ` Grant Likely
2011-10-24 22:21 ` Grant Likely
2011-10-24 22:21 ` Grant Likely
2011-10-25 6:10 ` Rajendra Nayak [this message]
2011-10-25 6:10 ` Rajendra Nayak
2011-10-25 7:08 ` Shawn Guo
2011-10-25 7:08 ` Shawn Guo
2011-10-25 7:08 ` Shawn Guo
2011-10-25 7:01 ` Rajendra Nayak
2011-10-25 7:01 ` Rajendra Nayak
2011-10-25 7:01 ` Rajendra Nayak
2011-10-25 7:28 ` Shawn Guo
2011-10-25 7:28 ` Shawn Guo
2011-10-25 7:28 ` Shawn Guo
2011-10-10 16:19 ` [PATCH v2 4/5] regulator: adapt fixed regulator driver to dt Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-13 18:43 ` Grant Likely
2011-10-13 18:43 ` Grant Likely
2011-10-13 18:43 ` Grant Likely
2011-10-10 16:19 ` [PATCH v2 5/5] regulator: map consumer regulator based on device tree Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 16:19 ` Rajendra Nayak
2011-10-10 17:35 ` Mark Brown
2011-10-10 17:35 ` Mark Brown
2011-10-10 17:35 ` Mark Brown
2011-10-11 5:49 ` Rajendra Nayak
2011-10-11 5:49 ` Rajendra Nayak
2011-10-11 7:08 ` Nayak, Rajendra
2011-10-11 7:08 ` Nayak, Rajendra
2011-10-11 7:08 ` Nayak, Rajendra
[not found] ` <CACYZBRFmLEY_f1UwJa5U9uj8+NVA-WfUVkiuW1yKrpwnrA_00A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-10-13 16:52 ` Mark Brown
2011-10-13 16:52 ` Mark Brown
2011-10-13 16:52 ` Mark Brown
2011-10-13 18:46 ` Grant Likely
2011-10-13 18:46 ` Grant Likely
2011-10-18 13:33 ` Shawn Guo
2011-10-18 13:33 ` Shawn Guo
2011-10-18 13:33 ` Shawn Guo
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