JZ4780_I2C_RXTL
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, rd_left - 1);
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, len - 1);
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, i2c->cdata->rx_level);