static int spwr_battery_get_property()

in supply/surface_battery.c [543:663]

• 100 lines of code
• 30 McCabe index (conditional complexity)

static int spwr_battery_get_property(struct power_supply *psy, enum power_supply_property psp,
				     union power_supply_propval *val)
{
	struct spwr_battery_device *bat = power_supply_get_drvdata(psy);
	u32 value;
	int status;

	mutex_lock(&bat->lock);

	status = spwr_battery_update_bst_unlocked(bat, true);
	if (status)
		goto out;

	/* Abort if battery is not present. */
	if (!spwr_battery_present(bat) && psp != POWER_SUPPLY_PROP_PRESENT) {
		status = -ENODEV;
		goto out;
	}

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = spwr_battery_prop_status(bat);
		break;

	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = spwr_battery_present(bat);
		break;

	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = spwr_battery_prop_technology(bat);
		break;

	case POWER_SUPPLY_PROP_CYCLE_COUNT:
		value = get_unaligned_le32(&bat->bix.cycle_count);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
		value = get_unaligned_le32(&bat->bix.design_voltage);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value * 1000;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		value = get_unaligned_le32(&bat->bst.present_voltage);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value * 1000;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_CURRENT_NOW:
	case POWER_SUPPLY_PROP_POWER_NOW:
		value = get_unaligned_le32(&bat->bst.present_rate);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value * 1000;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
		value = get_unaligned_le32(&bat->bix.design_cap);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value * 1000;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_CHARGE_FULL:
	case POWER_SUPPLY_PROP_ENERGY_FULL:
		value = get_unaligned_le32(&bat->bix.last_full_charge_cap);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value * 1000;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_CHARGE_NOW:
	case POWER_SUPPLY_PROP_ENERGY_NOW:
		value = get_unaligned_le32(&bat->bst.remaining_cap);
		if (value != SPWR_BATTERY_VALUE_UNKNOWN)
			val->intval = value * 1000;
		else
			status = -ENODATA;
		break;

	case POWER_SUPPLY_PROP_CAPACITY:
		val->intval = spwr_battery_prop_capacity(bat);
		break;

	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
		val->intval = spwr_battery_prop_capacity_level(bat);
		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = bat->bix.model;
		break;

	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = bat->bix.oem_info;
		break;

	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
		val->strval = bat->bix.serial;
		break;

	default:
		status = -EINVAL;
		break;
	}

out:
	mutex_unlock(&bat->lock);
	return status;
}