FF_GAIN
[FF_GAIN] = "FF_GAIN",
FF_GAIN,
set_bit(FF_GAIN, dev->ffbit);
case FF_GAIN:
if (!test_bit(FF_GAIN, dev->ffbit) || value > 0xffffU)
set_bit(FF_GAIN, dev->ffbit);
FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP, FF_SAW_DOWN, FF_GAIN,
input_set_capability(haptics->input_dev, EV_FF, FF_GAIN);
uinput_dev_event(dev, EV_FF, FF_GAIN, gain);
#define FF_MAX_EFFECTS FF_GAIN