Hi Guennadi,
Thank you for the patch.
On Wednesday 28 August 2013 15:28:26 Guennadi Liakhovetski wrote:
> Many bridges and video host controllers supply fixed rate always on clocks
> to their I2C devices. This patch adds two simple helpers to register and
> unregister such a clock.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-clk.c | 39 +++++++++++++++++++++++++++++++++
> include/media/v4l2-clk.h | 14 ++++++++++++
> 2 files changed, 53 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-clk.c
> b/drivers/media/v4l2-core/v4l2-clk.c index b67de86..e18cc04 100644
> --- a/drivers/media/v4l2-core/v4l2-clk.c
> +++ b/drivers/media/v4l2-core/v4l2-clk.c
> @@ -240,3 +240,42 @@ void v4l2_clk_unregister(struct v4l2_clk *clk)
> kfree(clk);
> }
> EXPORT_SYMBOL(v4l2_clk_unregister);
> +
> +struct v4l2_clk_fixed {
> + unsigned long rate;
> + struct v4l2_clk_ops ops;
> +};
> +
> +static unsigned long fixed_get_rate(struct v4l2_clk *clk)
> +{
> + struct v4l2_clk_fixed *priv = clk->priv;
> + return priv->rate;
> +}
> +
> +struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
> + const char *id, unsigned long rate, struct module *owner)
> +{
> + struct v4l2_clk *clk;
> + struct v4l2_clk_fixed *priv = kzalloc(sizeof(*priv), GFP_KERNEL);
> +
> + if (!priv)
> + return ERR_PTR(-ENOMEM);
> +
> + priv->rate = rate;
> + priv->ops.get_rate = fixed_get_rate;
> + priv->ops.owner = owner;
The ops owner is v4l2-clk.c, shouldn't you use THIS_MODULE here instead of the
caller's THIS_MODULE ?
> +
> + clk = v4l2_clk_register(&priv->ops, dev_id, id, priv);
> + if (IS_ERR(clk))
> + kfree(priv);
> +
> + return clk;
> +}
> +EXPORT_SYMBOL(__v4l2_clk_register_fixed);
> +
> +void v4l2_clk_unregister_fixed(struct v4l2_clk *clk)
> +{
> + kfree(clk->priv);
> + v4l2_clk_unregister(clk);
> +}
> +EXPORT_SYMBOL(v4l2_clk_unregister_fixed);
> diff --git a/include/media/v4l2-clk.h b/include/media/v4l2-clk.h
> index 0503a90..a354a9d 100644
> --- a/include/media/v4l2-clk.h
> +++ b/include/media/v4l2-clk.h
> @@ -15,6 +15,7 @@
> #define MEDIA_V4L2_CLK_H
>
> #include <linux/atomic.h>
> +#include <linux/export.h>
> #include <linux/list.h>
> #include <linux/mutex.h>
>
> @@ -51,4 +52,17 @@ void v4l2_clk_disable(struct v4l2_clk *clk);
> unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk);
> int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate);
>
> +struct module;
> +
> +struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
> + const char *id, unsigned long rate, struct module *owner);
> +void v4l2_clk_unregister_fixed(struct v4l2_clk *clk);
> +
> +static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id,
> + const char *id,
> + unsigned long rate)
> +{
> + return __v4l2_clk_register_fixed(dev_id, id, rate, THIS_MODULE);
> +}
> +
> #endif
--
Regards,
Laurent Pinchart
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