Re: [PATCH v2 3/3] media: atmel-isi: remove mck back compatiable code as it's not need

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Josh,

Thank you for the patch.

On Thursday 09 April 2015 17:01:48 Josh Wu wrote:
> The master clock should handled by sensor itself.
> 
> Signed-off-by: Josh Wu <josh.wu@atmel.com>
> ---
> 
> Changes in v2:
> - totally remove clock_start()/clock_stop() as they are optional.
> 
>  drivers/media/platform/soc_camera/atmel-isi.c | 45 ------------------------
>  1 file changed, 45 deletions(-)
> 
> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
> b/drivers/media/platform/soc_camera/atmel-isi.c index 2b05f89..7bba7d9
> 100644
> --- a/drivers/media/platform/soc_camera/atmel-isi.c
> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> @@ -83,8 +83,6 @@ struct atmel_isi {
>  	struct completion		complete;
>  	/* ISI peripherial clock */
>  	struct clk			*pclk;
> -	/* ISI_MCK, feed to camera sensor to generate pixel clock */
> -	struct clk			*mck;
>  	unsigned int			irq;
> 
>  	struct isi_platform_data	pdata;
> @@ -727,31 +725,6 @@ static void isi_camera_remove_device(struct
> soc_camera_device *icd) icd->devnum);
>  }
> 
> -/* Called with .host_lock held */
> -static int isi_camera_clock_start(struct soc_camera_host *ici)
> -{
> -	struct atmel_isi *isi = ici->priv;
> -	int ret;
> -
> -	if (!IS_ERR(isi->mck)) {
> -		ret = clk_prepare_enable(isi->mck);
> -		if (ret) {
> -			return ret;
> -		}
> -	}
> -
> -	return 0;
> -}
> -
> -/* Called with .host_lock held */
> -static void isi_camera_clock_stop(struct soc_camera_host *ici)
> -{
> -	struct atmel_isi *isi = ici->priv;
> -
> -	if (!IS_ERR(isi->mck))
> -		clk_disable_unprepare(isi->mck);
> -}
> -
>  static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
>  {
>  	struct soc_camera_device *icd = file->private_data;
> @@ -865,8 +838,6 @@ static struct soc_camera_host_ops
> isi_soc_camera_host_ops = { .owner		= THIS_MODULE,
>  	.add		= isi_camera_add_device,
>  	.remove		= isi_camera_remove_device,
> -	.clock_start	= isi_camera_clock_start,
> -	.clock_stop	= isi_camera_clock_stop,
>  	.set_fmt	= isi_camera_set_fmt,
>  	.try_fmt	= isi_camera_try_fmt,
>  	.get_formats	= isi_camera_get_formats,
> @@ -904,7 +875,6 @@ static int atmel_isi_probe_dt(struct atmel_isi *isi,
> 
>  	/* Default settings for ISI */
>  	isi->pdata.full_mode = 1;
> -	isi->pdata.mck_hz = ISI_DEFAULT_MCLK_FREQ;

You can also remove the #define ISI_DEFAULT_MCLK_FREQ at the beginning of this 
file.

With this fixed,

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

>  	isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
> 
>  	np = of_graph_get_next_endpoint(np, NULL);
> @@ -980,21 +950,6 @@ static int atmel_isi_probe(struct platform_device
> *pdev) INIT_LIST_HEAD(&isi->video_buffer_list);
>  	INIT_LIST_HEAD(&isi->dma_desc_head);
> 
> -	/* ISI_MCK is the sensor master clock. It should be handled by the
> -	 * sensor driver directly, as the ISI has no use for that clock. Make
> -	 * the clock optional here while platforms transition to the correct
> -	 * model.
> -	 */
> -	isi->mck = devm_clk_get(dev, "isi_mck");
> -	if (!IS_ERR(isi->mck)) {
> -		/* Set ISI_MCK's frequency, it should be faster than pixel
> -		 * clock.
> -		 */
> -		ret = clk_set_rate(isi->mck, isi->pdata.mck_hz);
> -		if (ret < 0)
> -			return ret;
> -	}
> -
>  	isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
>  				sizeof(struct fbd) * MAX_BUFFER_NUM,
>  				&isi->fb_descriptors_phys,

-- 
Regards,

Laurent Pinchart