diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iio/buffer.h | 24 | ||||
| -rw-r--r-- | include/linux/iio/consumer.h | 48 | ||||
| -rw-r--r-- | include/linux/iio/iio.h | 2 | ||||
| -rw-r--r-- | include/linux/iio/machine.h | 2 | ||||
| -rw-r--r-- | include/linux/platform_data/ad7887.h | 26 |
5 files changed, 97 insertions, 5 deletions
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index c629b3a1d9a9..027040569180 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -66,7 +66,8 @@ struct iio_buffer_access_funcs { * @stufftoread: [INTERN] flag to indicate new data. * @demux_list: [INTERN] list of operations required to demux the scan. * @demux_bounce: [INTERN] buffer for doing gather from incoming scan. - **/ + * @buffer_list: [INTERN] entry in the devices list of current buffers. + */ struct iio_buffer { int length; int bytes_per_datum; @@ -81,9 +82,22 @@ struct iio_buffer { const struct attribute_group *attrs; struct list_head demux_list; unsigned char *demux_bounce; + struct list_head buffer_list; }; /** + * iio_update_buffers() - add or remove buffer from active list + * @indio_dev: device to add buffer to + * @insert_buffer: buffer to insert + * @remove_buffer: buffer_to_remove + * + * Note this will tear down the all buffering and build it up again + */ +int iio_update_buffers(struct iio_dev *indio_dev, + struct iio_buffer *insert_buffer, + struct iio_buffer *remove_buffer); + +/** * iio_buffer_init() - Initialize the buffer structure * @buffer: buffer to be initialized **/ @@ -115,11 +129,11 @@ int iio_scan_mask_set(struct iio_dev *indio_dev, struct iio_buffer *buffer, int bit); /** - * iio_push_to_buffer() - push to a registered buffer. - * @buffer: IIO buffer structure for device - * @data: the data to push to the buffer + * iio_push_to_buffers() - push to a registered buffer. + * @indio_dev: iio_dev structure for device. + * @data: Full scan. */ -int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data); +int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data); int iio_update_demux(struct iio_dev *indio_dev); diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index e875bcf0478f..126c0a9375f2 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -18,10 +18,12 @@ struct iio_chan_spec; * 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; }; /** @@ -59,6 +61,52 @@ 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 + * @name: Name of 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(const char *name, + 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. diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 7806c24e5bc8..adca93a999a7 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -410,6 +410,7 @@ struct iio_buffer_setup_ops { * and owner * @event_interface: [INTERN] event chrdevs associated with interrupt lines * @buffer: [DRIVER] any buffer present + * @buffer_list: [INTERN] list of all buffers currently attached * @scan_bytes: [INTERN] num bytes captured to be fed to buffer demux * @mlock: [INTERN] lock used to prevent simultaneous device state * changes @@ -448,6 +449,7 @@ struct iio_dev { struct iio_event_interface *event_interface; struct iio_buffer *buffer; + struct list_head buffer_list; int scan_bytes; struct mutex mlock; diff --git a/include/linux/iio/machine.h b/include/linux/iio/machine.h index 809a3f08d5a5..1601a2a63a72 100644 --- a/include/linux/iio/machine.h +++ b/include/linux/iio/machine.h @@ -19,11 +19,13 @@ * @consumer_dev_name: Name to uniquely identify the consumer device. * @consumer_channel: Unique name used to identify the channel on the * consumer side. + * @consumer_data: Data about the channel for use by the consumer driver. */ struct iio_map { const char *adc_channel_label; const char *consumer_dev_name; const char *consumer_channel; + void *consumer_data; }; #endif diff --git a/include/linux/platform_data/ad7887.h b/include/linux/platform_data/ad7887.h new file mode 100644 index 000000000000..1e06eac3174d --- /dev/null +++ b/include/linux/platform_data/ad7887.h @@ -0,0 +1,26 @@ +/* + * AD7887 SPI ADC driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ +#ifndef IIO_ADC_AD7887_H_ +#define IIO_ADC_AD7887_H_ + +/** + * struct ad7887_platform_data - AD7887 ADC driver platform data + * @en_dual: Whether to use dual channel mode. If set to true AIN1 becomes the + * second input channel, and Vref is internally connected to Vdd. If set to + * false the device is used in single channel mode and AIN1/Vref is used as + * VREF input. + * @use_onchip_ref: Whether to use the onchip reference. If set to true the + * internal 2.5V reference is used. If set to false a external reference is + * used. + */ +struct ad7887_platform_data { + bool en_dual; + bool use_onchip_ref; +}; + +#endif /* IIO_ADC_AD7887_H_ */ |