[PATCH v9 11/13] IIO: consumer: allow to set buffer sizes
From: Arnaud Pouliquen <hidden>
Date: 2017-12-14 08:58:03
Also in:
alsa-devel, linux-devicetree, linux-iio
Subsystem:
iio subsystem and drivers, the rest · Maintainers:
Jonathan Cameron, Linus Torvalds
Add iio consumer API to set buffer size and watermark according to sysfs API. Signed-off-by: Arnaud Pouliquen <redacted> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- 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 2017f35..9887f4f 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. */
--
2.7.4