This version (22 May 2023 10:16) was approved by Dragos Bogdan.
Table of Contents
LTC2387 SAR ADC IIO Linux Driver
Supported Devices
Evaluation Boards
Description
This is a Linux industrial I/O (IIO) subsystem driver, targeting multi channel serial interface ADCs. The industrial I/O subsystem provides a unified framework for drivers for many different types of converters and sensors using a number of different physical interfaces (i2c, spi, etc). See IIO for more information.
Status
| Source | Mainlined? |
|---|---|
| git | [No] |
Files
| Function | File |
|---|---|
| driver | drivers/iio/adc/ltc2387.c |
| devicetree bindings | Documentation/devicetree/bindings/iio/adc/lltc,ltc2387.yaml |
Driver testing
Each and every IIO device, typically a hardware chip, has a device folder under /sys/bus/iio/devices/iio:deviceX. Where X is the IIO index of the device. Under every of these directory folders reside a set of files, depending on the characteristics and features of the hardware device in question. These files are consistently generalized and documented in the IIO ABI documentation. In order to determine which IIO deviceX corresponds to which hardware device, the user can read the name file /sys/bus/iio/devices/iio:deviceX/name. In case the sequence in which the iio device drivers are loaded/registered is constant, the numbering is constant and may be known in advance.
This specifies any shell prompt running on the target
root@analog:/# cd /sys/bus/iio/devices/ root@analog:/sys/bus/iio/devices# ls iio:device0 trigger0 root@analog:/sys/bus/iio/devices# cd iio:device0 root@analog:/sys/bus/iio/devices/iio:device0> ls -l drwxr-xr-x 2 root root 0 May 17 14:36 buffer drwxr-xr-x 2 root root 0 May 17 14:36 buffer0 -r--r--r-- 1 root root 4096 May 17 14:36 dev -r--r--r-- 1 root root 4096 May 17 14:36 name lrwxrwxrwx 1 root root 0 May 17 14:36 of_node -> ../../../../../firmware/devicetree/base/fpga-axi@0/ltc2387@0 drwxr-xr-x 2 root root 0 May 17 14:36 power -rw-r--r-- 1 root root 4096 May 17 14:36 sampling_frequency drwxr-xr-x 2 root root 0 May 17 14:36 scan_elements lrwxrwxrwx 1 root root 0 May 17 14:36 subsystem -> ../../../../../bus/iio -rw-r--r-- 1 root root 4096 May 17 14:36 uevent root@analog:/sys/bus/iio/devices/iio:device0#
Show device name
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# cat name ltc2387
Get/Set sampling frequency
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# cat sampling_frequency 15000000 root@analog:/sys/bus/iio/devices/iio:device3# echo 10000000 > sampling_frequency root@analog:/sys/bus/iio/devices/iio:device3# cat sampling_frequency 10000000
resources/tools-software/linux-drivers/iio-adc/ltc2387.txt · Last modified: 22 May 2023 10:16 by Dragos Bogdan