linux-kernel - Re: [PATCH] regulator: palmas: use correct device node for DT parsing

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Date:	Wed, 27 Feb 2013 19:58:35 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Graeme Gregory <gg@...mlogic.co.uk>
CC:	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Stephen Warren <swarren@...dia.com>,
	"ian@...mlogic.co.uk" <ian@...mlogic.co.uk>,
	"lrg@...com" <lrg@...com>
Subject: Re: [PATCH] regulator: palmas: use correct device node for DT parsing

On Wednesday 27 February 2013 07:53 PM, Graeme Gregory wrote:
> On 27/02/13 14:10, Laxman Dewangan wrote:
>> When device is registered through the DT then regulators node
>> exist in the parent device node of regulator driver. Hence passing
>> parent device node for parsing DT in place of self-device node
>> which is typically NULL.
>>
>> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
>> ---
>>   drivers/regulator/palmas-regulator.c |    2 +-
>>   1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
>> index e915629..f07501d 100644
>> --- a/drivers/regulator/palmas-regulator.c
>> +++ b/drivers/regulator/palmas-regulator.c
>> @@ -591,7 +591,7 @@ static int palmas_probe(struct platform_device *pdev)
>>   {
>>   	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
>>   	struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
>> -	struct device_node *node = pdev->dev.of_node;
>> +	struct device_node *node = pdev->dev.parent->of_node;
>>   	struct regulator_dev *rdev;
>>   	struct regulator_config config = { };
>>   	struct palmas_pmic *pmic;
> This is not correct, nor is the reasoning.
>
> I suspect your previous patch broke DT probing so your not getting nodes
> filled in.
>

I pasted my DT files in other patch for discussion. This is the way we 
are following for other device and DT file population.
Probably, I need to see your test DT file for more discussion.
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