static int bq25890_power_supply_get_property()

in supply/bq25890_charger.c [425:570]

• 115 lines of code
• 41 McCabe index (conditional complexity)

static int bq25890_power_supply_get_property(struct power_supply *psy,
					     enum power_supply_property psp,
					     union power_supply_propval *val)
{
	struct bq25890_device *bq = power_supply_get_drvdata(psy);
	struct bq25890_state state;
	bool do_adc_conv;
	int ret;

	mutex_lock(&bq->lock);
	/* update state in case we lost an interrupt */
	__bq25890_handle_irq(bq);
	state = bq->state;
	do_adc_conv = !state.online && bq25890_is_adc_property(psp);
	if (do_adc_conv)
		bq25890_field_write(bq, F_CONV_START, 1);
	mutex_unlock(&bq->lock);

	if (do_adc_conv)
		regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START],
			ret, !ret, 25000, 1000000);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (!state.online)
			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		else if (state.chrg_status == STATUS_NOT_CHARGING)
			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
		else if (state.chrg_status == STATUS_PRE_CHARGING ||
			 state.chrg_status == STATUS_FAST_CHARGING)
			val->intval = POWER_SUPPLY_STATUS_CHARGING;
		else if (state.chrg_status == STATUS_TERMINATION_DONE)
			val->intval = POWER_SUPPLY_STATUS_FULL;
		else
			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;

		break;

	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		if (!state.online || state.chrg_status == STATUS_NOT_CHARGING ||
		    state.chrg_status == STATUS_TERMINATION_DONE)
			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
		else if (state.chrg_status == STATUS_PRE_CHARGING)
			val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
		else if (state.chrg_status == STATUS_FAST_CHARGING)
			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
		else /* unreachable */
			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
		break;

	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = BQ25890_MANUFACTURER;
		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = bq25890_chip_name[bq->chip_version];
		break;

	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = state.online;
		break;

	case POWER_SUPPLY_PROP_HEALTH:
		if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		else if (state.bat_fault)
			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
			val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
		else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else
			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
		val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
		if (!state.online) {
			val->intval = 0;
			break;
		}

		ret = bq25890_field_read(bq, F_BATV); /* read measured value */
		if (ret < 0)
			return ret;

		/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
		val->intval = 2304000 + ret * 20000;
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
		val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
		break;

	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
		val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM);
		break;

	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
		val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
		break;

	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
		ret = bq25890_field_read(bq, F_IILIM);
		if (ret < 0)
			return ret;

		val->intval = bq25890_find_val(ret, TBL_IILIM);
		break;

	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
		if (ret < 0)
			return ret;

		/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
		val->intval = 2304000 + ret * 20000;
		break;

	case POWER_SUPPLY_PROP_CURRENT_NOW:
		ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
		if (ret < 0)
			return ret;

		/* converted_val = ADC_val * 50mA (table 10.3.19) */
		val->intval = ret * -50000;
		break;

	case POWER_SUPPLY_PROP_TEMP:
		ret = bq25890_field_read(bq, F_TSPCT);
		if (ret < 0)
			return ret;

		/* convert TS percentage into rough temperature */
		val->intval = bq25890_find_val(ret, TBL_TSPCT);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}