Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #418
Difficulty: Easy
'JavaScript' is a trademark of Oracle Corporation in the United States.
True or False?
Linux & Unix Commands - Search Man Pages

struct_input_polled_dev(9) [centos man page]

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 overridden 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 structure 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 3.10 June 2014 STRUCT INPUT_POLLED_(9)

Check Out this Related Man Page

struct_ff_device - force-feedback part of an input device SYNOPSIS
struct ff_device { int (* upload) (struct input_dev *dev, struct ff_effect *effect,struct ff_effect *old); int (* erase) (struct input_dev *dev, int effect_id); int (* playback) (struct input_dev *dev, int effect_id, int value); void (* set_gain) (struct input_dev *dev, u16 gain); void (* set_autocenter) (struct input_dev *dev, u16 magnitude); void (* destroy) (struct ff_device *); void * private; unsigned long ffbit[BITS_TO_LONGS(FF_CNT)]; struct mutex mutex; int max_effects; struct ff_effect * effects; struct file * effect_owners[]; }; MEMBERS
upload Called to upload an new effect into device erase Called to erase an effect from device playback Called to request device to start playing specified effect set_gain Called to set specified gain set_autocenter Called to auto-center device destroy called by input core when parent input device is being destroyed private driver-specific data, will be freed automatically ffbit[BITS_TO_LONGS(FF_CNT)] bitmap of force feedback capabilities truly supported by device (not emulated like ones in input_dev->ffbit) mutex mutex for serializing access to the device max_effects maximum number of effects supported by device effects pointer to an array of effects currently loaded into device effect_owners[] array of effect owners; when file handle owning an effect gets closed the effect is automatically erased DESCRIPTION
Every force-feedback device must implement upload and playback methods; erase is optional. set_gain and set_autocenter need only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER bits. Note that playback, set_gain and set_autocenter are called with dev->event_lock spinlock held and interrupts off and thus may not sleep. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT FF_DEVICE(9)

Featured Tech Videos