1INPUT_REGISTER_DEVIC(9) Input Subsystem INPUT_REGISTER_DEVIC(9)
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6 input_register_device - register device with input core
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9 int input_register_device(struct input_dev * dev);
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12 dev
13 device to be registered
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16 This function registers device with input core. The device must be
17 allocated with input_allocate_device and all it's capabilities set up
18 before registering. If function fails the device must be freed with
19 input_free_device. Once device has been successfully registered it can
20 be unregistered with input_unregister_device; input_free_device should
21 not be called in this case.
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23 Note that this function is also used to register managed input devices
24 (ones allocated with devm_input_allocate_device). Such managed input
25 devices need not be explicitly unregistered or freed, their tear down
26 is controlled by the devres infrastructure. It is also worth noting
27 that tear down of managed input devices is internally a 2-step process:
28 registered managed input device is first unregistered, but stays in
29 memory and can still handle input_event calls (although events will not
30 be delivered anywhere). The freeing of managed input device will happen
31 later, when devres stack is unwound to the point where device
32 allocation was made.
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35Kernel Hackers Manual 3.10 June 2019 INPUT_REGISTER_DEVIC(9)