st1202_read_reg
st1202_read_reg(chip, ST1202_ILED_REG0 + led->led_num, &value);
ret = st1202_read_reg(chip, ST1202_CHAN_ENABLE_LOW, &chan_low);
ret = st1202_read_reg(chip, ST1202_CHAN_ENABLE_HIGH, &chan_high);