linux-kernel - Re: [PATCHv3 5/8] devfreq: exynos4: Use SET_SYSTEM_SLEEP_PM

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Date:	Mon, 17 Mar 2014 10:34:37 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Jingoo Han <jg1.han@...sung.com>
Cc:	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	rafael.j.wysocki@...el.com, nm@...com, b.zolnierkie@...saung.com,
	pawel.moll@....com, mark.rutland@....com, swarren@...dotorg.org,
	ijc+devicetree@...lion.org.uk, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCHv3 5/8] devfreq: exynos4: Use SET_SYSTEM_SLEEP_PM_OPS macro

Hi Jingoo,

On 03/17/2014 09:17 AM, Jingoo Han wrote:
> On Friday, March 14, 2014 6:30 PM, Chanwoo Choi wrote:
>>
>> This patch use SET_SYSTEM_SLEEP_PM_OPS macro instead of legacy method.
>>
>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>> ---
>>  drivers/devfreq/exynos/exynos4_bus.c | 4 +++-
>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
>> index 60539e8..e5d2c5a 100644
>> --- a/drivers/devfreq/exynos/exynos4_bus.c
>> +++ b/drivers/devfreq/exynos/exynos4_bus.c
>> @@ -1247,6 +1247,7 @@ static int exynos4_busfreq_remove(struct platform_device *pdev)
>>  	return 0;
>>  }
>>
>> +#ifdef CONFIG_PM_SLEEP
>>  static int exynos4_busfreq_resume(struct device *dev)
>>  {
>>  	struct busfreq_data *data = dev_get_drvdata(dev);
>> @@ -1254,9 +1255,10 @@ static int exynos4_busfreq_resume(struct device *dev)
>>  	busfreq_mon_reset(data);
>>  	return 0;
>>  }
>> +#endif
>>
>>  static const struct dev_pm_ops exynos4_busfreq_pm = {
>> -	.resume	= exynos4_busfreq_resume,
>> +	SET_SYSTEM_SLEEP_PM_OPS(NULL, exynos4_busfreq_resume)
> 
> Hi Chanwoo Choi,
> 
> How about using SIMPLE_DEV_PM_OPS instead of SET_SYSTEM_SLEEP_PM_OPS?
> SIMPLE_DEV_PM_OPS is simpler as below.
> 
> static SIMPLE_DEV_PM_OPS(exynos4_busfreq_pm, NULL, exynos4_busfreq_resume);
> 
> However, if runtime pm functions will be added later,
> SIMPLE_DEV_PM_OPS is not necessary.
> 

OK, I'll use SIMPLE_DEV_PM_OPS on next patchset.

Best Regards,
Chanwoo Choi


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