ut_asserteq(400000, dm_i2c_get_bus_speed(bus));
ut_assertok(dm_i2c_read(dev, 0, buf, 5));
ut_asserteq(-EINVAL, dm_i2c_write(dev, 0, buf, 5));
ut_asserteq(400000, dm_i2c_get_bus_speed(bus));
ut_assertok(dm_i2c_read(dev, 0, buf, 5));
ut_asserteq(-EINVAL, dm_i2c_write(dev, 0, buf, 5));