quicki2c_init_write_buf
len = quicki2c_init_write_buf(qcdev, cmd, cmd_len, true, NULL, 0,
len = quicki2c_init_write_buf(qcdev, 0, 0, false, buf, buf_len,
len = quicki2c_init_write_buf(qcdev, cmd, cmd_len, buf ? true : false, buf,