gab_read_channel
return gab_read_channel(adc_bat, GAB_VOLTAGE, &val->intval);
return gab_read_channel(adc_bat, GAB_CURRENT, &val->intval);
return gab_read_channel(adc_bat, GAB_POWER, &val->intval);
return gab_read_channel(adc_bat, GAB_TEMP, &val->intval);