IIO buffer sysfs interface
==========================
An IIO buffer has an associated attributes directory under
-:file:`/sys/bus/iio/iio:device{X}/buffer/*`. Here are some of the existing
-attributes:
+:file:`/sys/bus/iio/devices/iio:device{X}/buffer/*`. Here are some of the
+existing attributes:
* :file:`length`, the total number of data samples (capacity) that can be
stored by the buffer.
The meta information associated with a channel reading placed in a buffer is
called a scan element. The important bits configuring scan elements are
exposed to userspace applications via the
-:file:`/sys/bus/iio/iio:device{X}/scan_elements/` directory. This directory contains
-attributes of the following form:
+:file:`/sys/bus/iio/devices/iio:device{X}/scan_elements/` directory. This
+directory contains attributes of the following form:
* :file:`enable`, used for enabling a channel. If and only if its attribute
is non *zero*, then a triggered capture will contain data samples for this
There are two ways for a user space application to interact with an IIO driver.
-1. :file:`/sys/bus/iio/iio:device{X}/`, this represents a hardware sensor
+1. :file:`/sys/bus/iio/devices/iio:device{X}/`, this represents a hardware sensor
and groups together the data channels of the same chip.
2. :file:`/dev/iio:device{X}`, character device node interface used for
buffered data transfer and for events information retrieval.
Attributes are sysfs files used to expose chip info and also allowing
applications to set various configuration parameters. For device with
-index X, attributes can be found under /sys/bus/iio/iio:deviceX/ directory.
-Common attributes are:
+index X, attributes can be found under /sys/bus/iio/devices/iio:deviceX/
+directory. Common attributes are:
* :file:`name`, description of the physical chip.
* :file:`dev`, shows the major:minor pair associated with
This channel's definition will generate two separate sysfs files for raw data
retrieval:
-* :file:`/sys/bus/iio/iio:device{X}/in_intensity_ir_raw`
-* :file:`/sys/bus/iio/iio:device{X}/in_intensity_both_raw`
+* :file:`/sys/bus/iio/devices/iio:device{X}/in_intensity_ir_raw`
+* :file:`/sys/bus/iio/devices/iio:device{X}/in_intensity_both_raw`
one file for processed data:
-* :file:`/sys/bus/iio/iio:device{X}/in_illuminance_input`
+* :file:`/sys/bus/iio/devices/iio:device{X}/in_illuminance_input`
and one shared sysfs file for sampling frequency:
-* :file:`/sys/bus/iio/iio:device{X}/sampling_frequency`.
+* :file:`/sys/bus/iio/devices/iio:device{X}/sampling_frequency`.
Here is how we can make use of the channel's indexing::