On Mon, May 24, 2010 at 04:20:39PM +0300, Baruch Siach wrote:
> This is the soc_camera support developed by Sascha Hauer for the i.MX27. Alan
> Carvalho de Assis modified the original driver to get it working on more recent
> kernels. I modified it further to add support for i.MX25. This driver has been
> tested on i.MX25 and i.MX27 based platforms.
>
> Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx>
> ---
> arch/arm/plat-mxc/include/mach/memory.h | 4 +-
> arch/arm/plat-mxc/include/mach/mx2_cam.h | 46 +
> drivers/media/video/Kconfig | 13 +
> drivers/media/video/Makefile | 1 +
> drivers/media/video/mx2_camera.c | 1471 ++++++++++++++++++++++++++++++
> 5 files changed, 1533 insertions(+), 2 deletions(-)
> create mode 100644 arch/arm/plat-mxc/include/mach/mx2_cam.h
> create mode 100644 drivers/media/video/mx2_camera.c
>
[snip]
> +
> +static int mclk_get_divisor(struct mx2_camera_dev *pcdev)
> +{
> + dev_info(pcdev->dev, "%s not implemented. Running at max speed\n",
> + __func__);
> +
> +#if 0
> + unsigned int mclk = pcdev->pdata->clk_csi;
> + unsigned int pclk = clk_get_rate(pcdev->clk_csi);
> + int i;
> +
> + dev_dbg(pcdev->dev, "%s: %ld %ld\n", __func__, mclk, pclk);
> +
> + for (i = 0; i < 0xf; i++)
> + if ((i + 1) * 2 * mclk <= pclk)
> + break;
> + return i;
> +#endif
> + return 0;
> +}
This function, if implemented properly, can be used to add an additional
divider for the sensors master clock. On i.MX27 we can adjust the master
clock using the clk_set_rate below which is sufficient, so you can
remove this function completely.
Sascha
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