smbus_io_req_set_write_u16
if (!smbus_io_req_set_write_u16(req->io_smbus, req->io_cmd,
extern bool smbus_io_req_set_write_u16(smbus_io_req_t *, uint8_t, uint16_t);
if (!smbus_io_req_set_write_u16(req, 0x23, 0x7777)) {