On Thu, 9 Nov 2017 11:12:32 +0100
Arnaud Pouliquen <arnaud.pouliquen@xxxxxx> wrote:
> Add iio consumer API to set buffer size and watermark according
> to sysfs API.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> ---
> V3 -> V4 changes:
> - Set only the Watermark not the buffer lenght
> - Rename functions to replace "params" with "watermark"
>
> drivers/iio/buffer/industrialio-buffer-cb.c | 11 +++++++++++
> include/linux/iio/consumer.h | 11 +++++++++++
> 2 files changed, 22 insertions(+)
>
> diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c
> index 4847534..ea63c83 100644
> --- a/drivers/iio/buffer/industrialio-buffer-cb.c
> +++ b/drivers/iio/buffer/industrialio-buffer-cb.c
> @@ -104,6 +104,17 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,
> }
> EXPORT_SYMBOL_GPL(iio_channel_get_all_cb);
>
> +int iio_channel_cb_set_buffer_watermark(struct iio_cb_buffer *cb_buff,
> + size_t watermark)
> +{
> + if (!watermark)
> + return -EINVAL;
> + cb_buff->buffer.watermark = watermark;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(iio_channel_cb_set_buffer_watermark);
> +
> int iio_channel_start_all_cb(struct iio_cb_buffer *cb_buff)
> {
> return iio_update_buffers(cb_buff->indio_dev, &cb_buff->buffer,
> diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
> index 5e347a9..0d94557 100644
> --- a/include/linux/iio/consumer.h
> +++ b/include/linux/iio/consumer.h
> @@ -134,6 +134,17 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,
> void *private),
> void *private);
> /**
> + * iio_channel_cb_set_buffer_watermark() - set the buffer watermark.
> + * @cb_buffer: The callback buffer from whom we want the channel
> + * information.
> + * @watermark: buffer watermark in bytes.
> + *
> + * This function allows to configure the buffer watermark.
> + */
> +int iio_channel_cb_set_buffer_watermark(struct iio_cb_buffer *cb_buffer,
> + size_t watermark);
> +
> +/**
> * iio_channel_release_all_cb() - release and unregister the callback.
> * @cb_buffer: The callback buffer that was allocated.
> */
--
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