docs: iio: add documentation for interfacing tools

Add documentation for IIO interfacing tools describing the available
tools which can be used to retrieve data from IIO sysfs.
Reference this documentation in adis16475.rst
Signed-off-by: Ramona Gradinariu <ramona.gradinariu@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240528142409.239187-6-ramona.gradinariu@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/iio/adis16475.rst

@@ -380,24 +380,5 @@ data is structured.
 4. IIO Interfacing Tools
 ========================
 
-Linux Kernel Tools
-------------------
-
-Linux Kernel provides some userspace tools that can be used to retrieve data
-from IIO sysfs:
-
-* lsiio: example application that provides a list of IIO devices and triggers
-* iio_event_monitor: example application that reads events from an IIO device
-  and prints them
-* iio_generic_buffer: example application that reads data from buffer
-* iio_utils: set of APIs, typically used to access sysfs files.
-
-LibIIO
-------
-
-LibIIO is a C/C++ library that provides generic access to IIO devices. The
-library abstracts the low-level details of the hardware, and provides a simple
-yet complete programming interface that can be used for advanced projects.
-
-For more information about LibIIO, please see:
-https://github.com/analogdevicesinc/libiio
+See ``Documentation/iio/iio_tools.rst`` for the description of the available IIO
+interfacing tools.

Documentation/iio/iio_tools.rst

+.. SPDX-License-Identifier: GPL-2.0
+
+=====================
+IIO Interfacing Tools
+=====================
+
+1. Linux Kernel Tools
+=====================
+
+Linux Kernel provides some userspace tools that can be used to retrieve data
+from IIO sysfs:
+
+* lsiio: example application that provides a list of IIO devices and triggers
+* iio_event_monitor: example application that reads events from an IIO device
+  and prints them
+* iio_generic_buffer: example application that reads data from buffer
+* iio_utils: set of APIs, typically used to access sysfs files.
+
+2. LibIIO
+=========
+
+LibIIO is a C/C++ library that provides generic access to IIO devices. The
+library abstracts the low-level details of the hardware, and provides a simple
+yet complete programming interface that can be used for advanced projects.
+
+For more information about LibIIO, please see:
+https://github.com/analogdevicesinc/libiio

Documentation/iio/index.rst

@@ -9,6 +9,7 @@ Industrial I/O
 
    iio_configfs
    iio_devbuf
+   iio_tools
 
 Industrial I/O Kernel Drivers
 =============================