linux-kernel - RE: [PATCH 11/13] power_supply: max8925: use platform

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Date:	Wed, 13 Apr 2011 19:26:53 -0700
From:	Haojian Zhuang <hzhuang1@...vell.com>
To:	Anton Vorontsov <cbouatmailru@...il.com>
CC:	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"haojian.zhuang@...il.com" <haojian.zhuang@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: RE: [PATCH 11/13] power_supply: max8925: use platform_data from cell



>-----Original Message-----
>From: Anton Vorontsov [mailto:cbouatmailru@...il.com]
>Sent: 2011年4月13日 11:03 PM
>To: Haojian Zhuang
>Cc: sameo@...ux.intel.com; haojian.zhuang@...il.com; linux-
>kernel@...r.kernel.org; David Woodhouse
>Subject: Re: [PATCH 11/13] power_supply: max8925: use platform_data from
>cell
>
>On Wed, Apr 13, 2011 at 10:51:02PM +0800, Haojian Zhuang wrote:
>> Avoid to get platform_data from parent device. Get it from mfd cell
>> device instead.
>>
>> Signed-off-by: Haojian Zhuang <haojian.zhuang@...vell.com>
>> Cc: Anton Vorontsov <cbou@...l.ru>
>> Cc: David Woodhouse <dwmw2@...radead.org>
>> ---
>
>I don't see the whole series, but I hope the patch doesn't break any
>existing in-tree users of that driver?
>
Excuse me for not include you in the whole series. I checked that it won't
break existing code.

The fix for this patch is already sent. Please help to review.

>>  drivers/power/max8925_power.c |   16 +++++-----------
>>  1 files changed, 5 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/power/max8925_power.c
>b/drivers/power/max8925_power.c
>> index 8e5aec2..359c53c 100644
>> --- a/drivers/power/max8925_power.c
>> +++ b/drivers/power/max8925_power.c
>> @@ -425,21 +425,16 @@ static __devexit int
>max8925_deinit_charger(struct max8925_power_info *info)
>>  static __devinit int max8925_power_probe(struct platform_device *pdev)
>>  {
>>  	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
>> -	struct max8925_platform_data *max8925_pdata;
>>  	struct max8925_power_pdata *pdata = NULL;
>>  	struct max8925_power_info *info;
>> -	int ret;
>> -
>> -	if (pdev->dev.parent->platform_data) {
>> -		max8925_pdata = pdev->dev.parent->platform_data;
>> -		pdata = max8925_pdata->power;
>> -	}
>> +	int ret = -EINVAL;
>
>I guess you don't need the initializer.
>
OK

>>
>> -	if (!pdata) {
>> +	pdata = pdev->dev.platform_data;
>> +	if (pdata == NULL) {
>
>I'd prefer to keep '!pdata'.
>
OK

>>  		dev_err(&pdev->dev, "platform data isn't assigned to "
>>  			"power supply\n");
>>  		return -EINVAL;
>> -	}
>> +	};
>
>No need for the semicolon.
OK

>
>>
>>  	info = kzalloc(sizeof(struct max8925_power_info), GFP_KERNEL);
>>  	if (!info)
>> @@ -447,6 +442,7 @@ static __devinit int max8925_power_probe(struct
>platform_device *pdev)
>>  	info->chip = chip;
>>  	info->gpm = chip->i2c;
>>  	info->adc = chip->adc;
>> +	dev_set_drvdata(&pdev->dev, info);
>
>As this is a platform driver, you'd better do platform_set_drvdata(pdev,
>info),
>not dev_set_drvdata(). In the end, it's the same thing.
>
Got it.

>>
>>  	info->ac.name = "max8925-ac";
>>  	info->ac.type = POWER_SUPPLY_TYPE_MAINS;
>> @@ -482,8 +478,6 @@ static __devinit int max8925_power_probe(struct
>platform_device *pdev)
>>  	info->topoff_threshold = pdata->topoff_threshold;
>>  	info->fast_charge = pdata->fast_charge;
>>  	info->set_charger = pdata->set_charger;
>> -	dev_set_drvdata(&pdev->dev, info);
>> -	platform_set_drvdata(pdev, info);
>>
>>  	max8925_init_charger(chip, info);
>>  	return 0;
>
>Thanks,
>
>--
>Anton Vorontsov
>Email: cbouatmailru@...il.com