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- ===========
- HW consumer
- ===========
- An IIO device can be directly connected to another device in hardware. In this
- case the buffers between IIO provider and IIO consumer are handled by hardware.
- The Industrial I/O HW consumer offers a way to bond these IIO devices without
- software buffer for data. The implementation can be found under
- :file:`drivers/iio/buffer/hw-consumer.c`
- * struct iio_hw_consumer — Hardware consumer structure
- * :c:func:`iio_hw_consumer_alloc` — Allocate IIO hardware consumer
- * :c:func:`iio_hw_consumer_free` — Free IIO hardware consumer
- * :c:func:`iio_hw_consumer_enable` — Enable IIO hardware consumer
- * :c:func:`iio_hw_consumer_disable` — Disable IIO hardware consumer
- HW consumer setup
- =================
- As standard IIO device the implementation is based on IIO provider/consumer.
- A typical IIO HW consumer setup looks like this::
- static struct iio_hw_consumer *hwc;
- static const struct iio_info adc_info = {
- .read_raw = adc_read_raw,
- };
- static int adc_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan, int *val,
- int *val2, long mask)
- {
- ret = iio_hw_consumer_enable(hwc);
- /* Acquire data */
- ret = iio_hw_consumer_disable(hwc);
- }
- static int adc_probe(struct platform_device *pdev)
- {
- hwc = devm_iio_hw_consumer_alloc(&iio->dev);
- }
- More details
- ============
- .. kernel-doc:: drivers/iio/buffer/industrialio-hw-consumer.c
- :export:
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