STRUCT INPUT_POLLED_

Section: Input Subsystem (9)
Updated: February 2011
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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.  

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