linux-kernel - Re: [PATCH v5 4/4] media: s5p-tv: Fix mixer driver to work with CCF

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Date:	Wed, 25 Sep 2013 18:09:26 +0200
From:	Tomasz Stanislawski <t.stanislaws@...sung.com>
To:	Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
Cc:	m.chehab@...sung.com, t.figa@...sung.com,
	kyungmin.park@...sung.com, b.zolnierkie@...sung.com,
	s.nawrocki@...sung.com, linux-arm-kernel@...ts.infradead.org,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 4/4] media: s5p-tv: Fix mixer driver to work with CCF

rename to 'media: s5p-tv: mixer: integrate with CCF'

On 09/21/2013 05:00 PM, Mateusz Krawczuk wrote:
> Replace clk_enable by clock_enable_prepare and clk_disable with clk_disable_unprepare.
> Clock prepare is required by Clock Common Framework, and old clock driver didn`t support it.
> Without it Common Clock Framework prints a warning.
> 
> Signed-off-by: Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>

Acked-by: Tomasz Stanislawski <t.stanislaws@...sung.com>

> ---
>  drivers/media/platform/s5p-tv/mixer_drv.c | 34 +++++++++++++++++++++++++------
>  1 file changed, 28 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/platform/s5p-tv/mixer_drv.c b/drivers/media/platform/s5p-tv/mixer_drv.c
> index 8ce7c3e..7eea286 100644
> --- a/drivers/media/platform/s5p-tv/mixer_drv.c
> +++ b/drivers/media/platform/s5p-tv/mixer_drv.c
> @@ -347,19 +347,41 @@ static int mxr_runtime_resume(struct device *dev)
>  {
>  	struct mxr_device *mdev = to_mdev(dev);
>  	struct mxr_resources *res = &mdev->res;
> +	int ret;
>  
>  	dev_dbg(mdev->dev, "resume - start\n");
>  	mutex_lock(&mdev->mutex);
>  	/* turn clocks on */
> -	clk_enable(res->mixer);
> -	clk_enable(res->vp);
> -	clk_enable(res->sclk_mixer);
> +	ret = clk_prepare_enable(res->mixer);
> +	if (ret < 0) {
> +		dev_err(mdev->dev, "clk_prepare_enable(mixer) failed\n");
> +		goto fail;
> +	}
> +	ret = clk_prepare_enable(res->vp);
> +	if (ret < 0) {
> +		dev_err(mdev->dev, "clk_prepare_enable(vp) failed\n");
> +		goto fail_mixer;
> +	}
> +	ret = clk_prepare_enable(res->sclk_mixer);
> +	if (ret < 0) {
> +		dev_err(mdev->dev, "clk_prepare_enable(sclk_mixer) failed\n");
> +		goto fail_vp;
> +	}
>  	/* apply default configuration */
>  	mxr_reg_reset(mdev);
>  	dev_dbg(mdev->dev, "resume - finished\n");
>  
>  	mutex_unlock(&mdev->mutex);
>  	return 0;
> +
> +fail_vp:
> +	clk_disable_unprepare(res->vp);
> +fail_mixer:
> +	clk_disable_unprepare(res->mixer);
> +fail:
> +	mutex_unlock(&mdev->mutex);
> +	dev_err(mdev->dev, "resume failed\n");
> +	return ret;
>  }
>  
>  static int mxr_runtime_suspend(struct device *dev)
> @@ -369,9 +391,9 @@ static int mxr_runtime_suspend(struct device *dev)
>  	dev_dbg(mdev->dev, "suspend - start\n");
>  	mutex_lock(&mdev->mutex);
>  	/* turn clocks off */
> -	clk_disable(res->sclk_mixer);
> -	clk_disable(res->vp);
> -	clk_disable(res->mixer);
> +	clk_disable_unprepare(res->sclk_mixer);
> +	clk_disable_unprepare(res->vp);
> +	clk_disable_unprepare(res->mixer);
>  	mutex_unlock(&mdev->mutex);
>  	dev_dbg(mdev->dev, "suspend - finished\n");
>  	return 0;
> 

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