diff options
| -rw-r--r-- | drivers/iio/buffer/industrialio-buffer-cb.c | 24 | ||||
| -rw-r--r-- | include/linux/iio/consumer.h | 12 |
2 files changed, 26 insertions, 10 deletions
diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c index 323079c3ccce..b8f550e47d3d 100644 --- a/drivers/iio/buffer/industrialio-buffer-cb.c +++ b/drivers/iio/buffer/industrialio-buffer-cb.c @@ -18,6 +18,7 @@ struct iio_cb_buffer { int (*cb)(const void *data, void *private); void *private; struct iio_channel *channels; + struct iio_dev *indio_dev; }; static struct iio_cb_buffer *buffer_to_cb_buffer(struct iio_buffer *buffer) @@ -52,7 +53,6 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, { int ret; struct iio_cb_buffer *cb_buff; - struct iio_dev *indio_dev; struct iio_channel *chan; cb_buff = kzalloc(sizeof(*cb_buff), GFP_KERNEL); @@ -72,17 +72,17 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, goto error_free_cb_buff; } - indio_dev = cb_buff->channels[0].indio_dev; + cb_buff->indio_dev = cb_buff->channels[0].indio_dev; cb_buff->buffer.scan_mask - = kcalloc(BITS_TO_LONGS(indio_dev->masklength), sizeof(long), - GFP_KERNEL); + = kcalloc(BITS_TO_LONGS(cb_buff->indio_dev->masklength), + sizeof(long), GFP_KERNEL); if (cb_buff->buffer.scan_mask == NULL) { ret = -ENOMEM; goto error_release_channels; } chan = &cb_buff->channels[0]; while (chan->indio_dev) { - if (chan->indio_dev != indio_dev) { + if (chan->indio_dev != cb_buff->indio_dev) { ret = -EINVAL; goto error_free_scan_mask; } @@ -105,17 +105,14 @@ EXPORT_SYMBOL_GPL(iio_channel_get_all_cb); int iio_channel_start_all_cb(struct iio_cb_buffer *cb_buff) { - return iio_update_buffers(cb_buff->channels[0].indio_dev, - &cb_buff->buffer, + return iio_update_buffers(cb_buff->indio_dev, &cb_buff->buffer, NULL); } EXPORT_SYMBOL_GPL(iio_channel_start_all_cb); void iio_channel_stop_all_cb(struct iio_cb_buffer *cb_buff) { - iio_update_buffers(cb_buff->channels[0].indio_dev, - NULL, - &cb_buff->buffer); + iio_update_buffers(cb_buff->indio_dev, NULL, &cb_buff->buffer); } EXPORT_SYMBOL_GPL(iio_channel_stop_all_cb); @@ -133,6 +130,13 @@ struct iio_channel } EXPORT_SYMBOL_GPL(iio_channel_cb_get_channels); +struct iio_dev +*iio_channel_cb_get_iio_dev(const struct iio_cb_buffer *cb_buffer) +{ + return cb_buffer->indio_dev; +} +EXPORT_SYMBOL_GPL(iio_channel_cb_get_iio_dev); + MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>"); MODULE_DESCRIPTION("Industrial I/O callback buffer"); MODULE_LICENSE("GPL"); diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 3d672f72e7ec..9edccfba1ffb 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -165,6 +165,18 @@ struct iio_channel *iio_channel_cb_get_channels(const struct iio_cb_buffer *cb_buffer); /** + * iio_channel_cb_get_iio_dev() - get access to the underlying device. + * @cb_buffer: The callback buffer from whom we want the device + * information. + * + * This function allows one to obtain information about the device. + * The primary aim is to allow drivers that are consuming a device to query + * things like current trigger. + */ +struct iio_dev +*iio_channel_cb_get_iio_dev(const struct iio_cb_buffer *cb_buffer); + +/** * iio_read_channel_raw() - read from a given channel * @chan: The channel being queried. * @val: Value read back. |