diff options
Diffstat (limited to 'include/linux/iio/consumer.h')
| -rw-r--r-- | include/linux/iio/consumer.h | 60 |
1 files changed, 56 insertions, 4 deletions
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index e875bcf0478f..833926c91aa8 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -9,31 +9,37 @@ */ #ifndef _IIO_INKERN_CONSUMER_H_ #define _IIO_INKERN_CONSUMER_H_ + +#include <linux/types.h> #include <linux/iio/types.h> struct iio_dev; struct iio_chan_spec; +struct device; /** * struct iio_channel - everything needed for a consumer to use a channel * @indio_dev: Device on which the channel exists. * @channel: Full description of the channel. + * @data: Data about the channel used by consumer. */ struct iio_channel { struct iio_dev *indio_dev; const struct iio_chan_spec *channel; + void *data; }; /** * iio_channel_get() - get description of all that is needed to access channel. - * @name: Unique name of the device as provided in the iio_map + * @dev: Pointer to consumer device. Device name must match + * the name of the device as provided in the iio_map * with which the desired provider to consumer mapping * was registered. * @consumer_channel: Unique name to identify the channel on the consumer * side. This typically describes the channels use within * the consumer. E.g. 'battery_voltage' */ -struct iio_channel *iio_channel_get(const char *name, +struct iio_channel *iio_channel_get(struct device *dev, const char *consumer_channel); /** @@ -44,14 +50,14 @@ void iio_channel_release(struct iio_channel *chan); /** * iio_channel_get_all() - get all channels associated with a client - * @name: name of consumer device. + * @dev: Pointer to consumer device. * * Returns an array of iio_channel structures terminated with one with * null iio_dev pointer. * This function is used by fairly generic consumers to get all the * channels registered as having this consumer. */ -struct iio_channel *iio_channel_get_all(const char *name); +struct iio_channel *iio_channel_get_all(struct device *dev); /** * iio_channel_release_all() - reverse iio_channel_get_all @@ -59,6 +65,52 @@ struct iio_channel *iio_channel_get_all(const char *name); */ void iio_channel_release_all(struct iio_channel *chan); +struct iio_cb_buffer; +/** + * iio_channel_get_all_cb() - register callback for triggered capture + * @dev: Pointer to client device. + * @cb: Callback function. + * @private: Private data passed to callback. + * + * NB right now we have no ability to mux data from multiple devices. + * So if the channels requested come from different devices this will + * fail. + */ +struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, + int (*cb)(u8 *data, + void *private), + void *private); +/** + * iio_channel_release_all_cb() - release and unregister the callback. + * @cb_buffer: The callback buffer that was allocated. + */ +void iio_channel_release_all_cb(struct iio_cb_buffer *cb_buffer); + +/** + * iio_channel_start_all_cb() - start the flow of data through callback. + * @cb_buff: The callback buffer we are starting. + */ +int iio_channel_start_all_cb(struct iio_cb_buffer *cb_buff); + +/** + * iio_channel_stop_all_cb() - stop the flow of data through the callback. + * @cb_buff: The callback buffer we are stopping. + */ +void iio_channel_stop_all_cb(struct iio_cb_buffer *cb_buff); + +/** + * iio_channel_cb_get_channels() - get access to the underlying channels. + * @cb_buff: The callback buffer from whom we want the channel + * information. + * + * This function allows one to obtain information about the channels. + * Whilst this may allow direct reading if all buffers are disabled, the + * primary aim is to allow drivers that are consuming a channel to query + * things like scaling of the channel. + */ +struct iio_channel +*iio_channel_cb_get_channels(const struct iio_cb_buffer *cb_buffer); + /** * iio_read_channel_raw() - read from a given channel * @chan: The channel being queried. |