ub913_write
ub913_write(priv, UB913_REG_GPIO_CFG(0), 0, NULL);
ub913_write(priv, UB913_REG_GENERAL_CFG,
ub913_write(priv, UB913_REG_GENERAL_CFG, v, &ret);
ret = ub913_write(priv, UB913_REG_SCL_HIGH_TIME, scl_high, NULL);
ret = ub913_write(priv, UB913_REG_SCL_LOW_TIME, scl_low, NULL);