[PATCH 3/3] media: atmel-isi: remove mck back compatiable code as we don't need it

Laurent Pinchart
2015-03-05T10:41:08Z

Hi Josh,

Thank you for the patch.

On Thursday 05 March 2015 13:01:01 Josh Wu wrote:
> The master clock should handled by sensor itself.

I like that :-)

> Signed-off-by: Josh Wu <josh.wu@atmel.com>
> ---
>
> drivers/media/platform/soc_camera/atmel-isi.c | 32 ------------------------
> 1 file changed, 32 deletions(-)
>
> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
> b/drivers/media/platform/soc_camera/atmel-isi.c index 4a384f1..50375ce
> 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;
> @@ -725,26 +723,12 @@ static void isi_camera_remove_device(struct
> soc_camera_device *icd) /* 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;

Would it make sense to make the clock_start and clock_stop operations optional
in the soc-camera core ?

> }
>
> /* 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)
> @@ -894,7 +878,6 @@ 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;
> isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
>
> np = of_graph_get_next_endpoint(np, NULL);
> @@ -970,21 +953,6 @@ 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