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

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Message-id: <001501cf4176$3d23daa0$b76b8fe0$%han@samsung.com>
Date:	Mon, 17 Mar 2014 09:17:10 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Chanwoo Choi' <cw00.choi@...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,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: [PATCHv3 5/8] devfreq: exynos4: Use SET_SYSTEM_SLEEP_PM_OPS macro

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.

Best regards,
Jingoo Han

>  };
> 
>  static const struct platform_device_id exynos4_busfreq_id[] = {
> --
> 1.8.0

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