| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _lirc_dev_intro: |
| |
| ************ |
| Introduction |
| ************ |
| |
| The LIRC device interface is a bi-directional interface for transporting |
| raw IR data between userspace and kernelspace. Fundamentally, it is just |
| a chardev (/dev/lircX, for X = 0, 1, 2, ...), with a number of standard |
| struct file_operations defined on it. With respect to transporting raw |
| IR data to and fro, the essential fops are read, write and ioctl. |
| |
| Example dmesg output upon a driver registering w/LIRC: |
| |
| $ dmesg |grep lirc_dev |
| |
| lirc_dev: IR Remote Control driver registered, major 248 |
| |
| rc rc0: lirc_dev: driver ir-lirc-codec (mceusb) registered at minor |
| = 0 |
| |
| What you should see for a chardev: |
| |
| $ ls -l /dev/lirc* |
| |
| crw-rw---- 1 root root 248, 0 Jul 2 22:20 /dev/lirc0 |
| |
| |
| .. ------------------------------------------------------------------------------ |
| .. This file was automatically converted from DocBook-XML with the dbxml |
| .. library (https://github.com/return42/sphkerneldoc). The origin XML comes |
| .. from the linux kernel, refer to: |
| .. |
| .. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook |
| .. ------------------------------------------------------------------------------ |