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input_register_device(9) [centos man page]

INPUT_REGISTER_DEVIC(9) 					  Input Subsystem					   INPUT_REGISTER_DEVIC(9)

NAME
input_register_device - register device with input core SYNOPSIS
int input_register_device(struct input_dev * dev); ARGUMENTS
dev device to be registered DESCRIPTION
This function registers device with input core. The device must be allocated with input_allocate_device and all it's capabilities set up before registering. If function fails the device must be freed with input_free_device. Once device has been successfully registered it can be unregistered with input_unregister_device; input_free_device should not be called in this case. Note that this function is also used to register managed input devices (ones allocated with devm_input_allocate_device). Such managed input devices need not be explicitly unregistered or freed, their tear down is controlled by the devres infrastructure. It is also worth noting that tear down of managed input devices is internally a 2-step process: registered managed input device is first unregistered, but stays in memory and can still handle input_event calls (although events will not be delivered anywhere). The freeing of managed input device will happen later, when devres stack is unwound to the point where device allocation was made. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 INPUT_REGISTER_DEVIC(9)

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STRUCT 
INPUT_POLLED_(9) Input Subsystem STRUCT INPUT_POLLED_(9) NAME
struct_input_polled_dev - simple polled input device SYNOPSIS
struct input_polled_dev { void * private; void (* open) (struct input_polled_dev *dev); void (* close) (struct input_polled_dev *dev); void (* poll) (struct input_polled_dev *dev); unsigned int poll_interval; unsigned int poll_interval_max; unsigned int poll_interval_min; struct input_dev * input; }; MEMBERS
private private driver data. open driver-supplied method that prepares device for polling (enabled the device and maybe flushes device state). close driver-supplied method that is called when device is no longer being polled. Used to put device into low power mode. poll driver-supplied method that polls the device and posts input events (mandatory). poll_interval specifies how often the poll method should be called. Defaults to 500 msec unless overriden when registering the device. poll_interval_max specifies upper bound for the poll interval. Defaults to the initial value of poll_interval. poll_interval_min specifies lower bound for the poll interval. Defaults to 0. input input device structire associated with the polled device. Must be properly initialized by the driver (id, name, phys, bits). DESCRIPTION
Polled input device provides a skeleton for supporting simple input devices that do not raise interrupts but have to be periodically scanned or polled to detect changes in their state. COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRUCT INPUT_POLLED_(9)

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