static int acpi_battery_get_property()

in battery.c [195:306]

• 109 lines of code
• 40 McCabe index (conditional complexity)

static int acpi_battery_get_property(struct power_supply *psy,
				     enum power_supply_property psp,
				     union power_supply_propval *val)
{
	int full_capacity = ACPI_BATTERY_VALUE_UNKNOWN, ret = 0;
	struct acpi_battery *battery = to_acpi_battery(psy);

	if (acpi_battery_present(battery)) {
		/* run battery update only if it is present */
		acpi_battery_get_state(battery);
	} else if (psp != POWER_SUPPLY_PROP_PRESENT)
		return -ENODEV;
	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
			val->intval = acpi_battery_handle_discharging(battery);
		else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
			val->intval = POWER_SUPPLY_STATUS_CHARGING;
		else if (acpi_battery_is_charged(battery))
			val->intval = POWER_SUPPLY_STATUS_FULL;
		else if (battery_quirk_notcharging)
			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
		else
			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = acpi_battery_present(battery);
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = acpi_battery_technology(battery);
		break;
	case POWER_SUPPLY_PROP_CYCLE_COUNT:
		val->intval = battery->cycle_count;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
		if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
			ret = -ENODEV;
		else
			val->intval = battery->design_voltage * 1000;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
			ret = -ENODEV;
		else
			val->intval = battery->voltage_now * 1000;
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
	case POWER_SUPPLY_PROP_POWER_NOW:
		if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
			ret = -ENODEV;
		else
			val->intval = battery->rate_now * 1000;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
		if (!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
			ret = -ENODEV;
		else
			val->intval = battery->design_capacity * 1000;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL:
	case POWER_SUPPLY_PROP_ENERGY_FULL:
		if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
			ret = -ENODEV;
		else
			val->intval = battery->full_charge_capacity * 1000;
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
	case POWER_SUPPLY_PROP_ENERGY_NOW:
		if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
			ret = -ENODEV;
		else
			val->intval = battery->capacity_now * 1000;
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		if (ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
			full_capacity = battery->full_charge_capacity;
		else if (ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
			full_capacity = battery->design_capacity;

		if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
		    full_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
			ret = -ENODEV;
		else
			val->intval = battery->capacity_now * 100/
					full_capacity;
		break;
	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
		if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
		else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
			(battery->capacity_now <= battery->alarm))
			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
		else if (acpi_battery_is_charged(battery))
			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
		else
			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
		break;
	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = battery->model_number;
		break;
	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = battery->oem_info;
		break;
	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
		val->strval = battery->serial_number;
		break;
	default:
		ret = -EINVAL;
	}
	return ret;
}