MAX_POS_BITS
x = (xpos << MAX_POS_BITS) - xpos;
y = (ypos << MAX_POS_BITS) - ypos;
input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1,
input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1,