docs: iio: ad4062: Add IIO Trigger support

Explains the IIO Trigger support and timings involved.

Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/Documentation/iio/ad4062.rst b/Documentation/iio/ad4062.rst
index 30200adf90c38e3ef22648d4786d402328e90c0f..12ac16dfc302841836ec10a99ef782fc586140de 100644 (file)
--- a/Documentation/iio/ad4062.rst
+++ b/Documentation/iio/ad4062.rst
@@ -84,3 +84,16 @@ Low-power mode
 The device enters low-power mode on idle to save power. Enabling an event puts
 the device out of the low-power since the ADC autonomously samples to assert
 the event condition.
+
+IIO trigger support
+===================
+
+An IIO trigger ``ad4062-devX`` is registered by the driver to be used by the
+same device, to capture samples to a software buffer. It is required to attach
+the trigger to the device by setting the ``current_trigger`` before enabling
+and reading the buffer.
+
+The acquisition is sequential and bounded by the protocol timings, software
+latency and internal timings, the sample rate is not configurable. The burst
+averaging mode does impact the effective sample rate, since it increases the
+internal timing to output a single sample.