=========== 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: