1=========== 2HW consumer 3=========== 4An IIO device can be directly connected to another device in hardware. In this 5case the buffers between IIO provider and IIO consumer are handled by hardware. 6The Industrial I/O HW consumer offers a way to bond these IIO devices without 7software buffer for data. The implementation can be found under 8:file:`drivers/iio/buffer/hw-consumer.c` 9 10 11* struct iio_hw_consumer — Hardware consumer structure 12* :c:func:`iio_hw_consumer_alloc` — Allocate IIO hardware consumer 13* :c:func:`iio_hw_consumer_free` — Free IIO hardware consumer 14* :c:func:`iio_hw_consumer_enable` — Enable IIO hardware consumer 15* :c:func:`iio_hw_consumer_disable` — Disable IIO hardware consumer 16 17 18HW consumer setup 19================= 20 21As standard IIO device the implementation is based on IIO provider/consumer. 22A typical IIO HW consumer setup looks like this:: 23 24 static struct iio_hw_consumer *hwc; 25 26 static const struct iio_info adc_info = { 27 .read_raw = adc_read_raw, 28 }; 29 30 static int adc_read_raw(struct iio_dev *indio_dev, 31 struct iio_chan_spec const *chan, int *val, 32 int *val2, long mask) 33 { 34 ret = iio_hw_consumer_enable(hwc); 35 36 /* Acquire data */ 37 38 ret = iio_hw_consumer_disable(hwc); 39 } 40 41 static int adc_probe(struct platform_device *pdev) 42 { 43 hwc = devm_iio_hw_consumer_alloc(&iio->dev); 44 } 45 46More details 47============ 48.. kernel-doc:: drivers/iio/buffer/industrialio-hw-consumer.c 49 :export: 50 51