1.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 2 3.. _Remote_controllers_Intro: 4 5************ 6Introduction 7************ 8 9Currently, most analog and digital devices have a Infrared input for 10remote controllers. Each manufacturer has their own type of control. It 11is not rare for the same manufacturer to ship different types of 12controls, depending on the device. 13 14A Remote Controller interface is mapped as a normal evdev/input 15interface, just like a keyboard or a mouse. So, it uses all ioctls 16already defined for any other input devices. 17 18However, remove controllers are more flexible than a normal input 19device, as the IR receiver (and/or transmitter) can be used in 20conjunction with a wide variety of different IR remotes. 21 22In order to allow flexibility, the Remote Controller subsystem allows 23controlling the RC-specific attributes via 24:ref:`the sysfs class nodes <remote_controllers_sysfs_nodes>`. 25