GOODIX_BERLIN_TOUCH_SIZE
u8 data[GOODIX_BERLIN_TOUCH_SIZE * GOODIX_BERLIN_MAX_TOUCH +
size_t offset = 2 * GOODIX_BERLIN_TOUCH_SIZE +
(n - 2) * GOODIX_BERLIN_TOUCH_SIZE);
int len = touch_num * GOODIX_BERLIN_TOUCH_SIZE +
2 * GOODIX_BERLIN_TOUCH_SIZE +