static int charger_get_property()

in supply/charger-manager.c [711:821]

• 96 lines of code
• 28 McCabe index (conditional complexity)

static int charger_get_property(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct charger_manager *cm = power_supply_get_drvdata(psy);
	struct charger_desc *desc = cm->desc;
	struct power_supply *fuel_gauge = NULL;
	int ret = 0;
	int uV;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = cm->battery_status;
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		if (cm->emergency_stop == CM_BATT_OVERHEAT)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else if (cm->emergency_stop == CM_BATT_COLD)
			val->intval = POWER_SUPPLY_HEALTH_COLD;
		else
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		if (is_batt_present(cm))
			val->intval = 1;
		else
			val->intval = 0;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		ret = get_batt_uV(cm, &val->intval);
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
		if (!fuel_gauge) {
			ret = -ENODEV;
			break;
		}
		ret = power_supply_get_property(fuel_gauge,
				POWER_SUPPLY_PROP_CURRENT_NOW, val);
		break;
	case POWER_SUPPLY_PROP_TEMP:
		return cm_get_battery_temperature(cm, &val->intval);
	case POWER_SUPPLY_PROP_CAPACITY:
		if (!is_batt_present(cm)) {
			/* There is no battery. Assume 100% */
			val->intval = 100;
			break;
		}

		fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
		if (!fuel_gauge) {
			ret = -ENODEV;
			break;
		}

		ret = power_supply_get_property(fuel_gauge,
					POWER_SUPPLY_PROP_CAPACITY, val);
		if (ret)
			break;

		if (val->intval > 100) {
			val->intval = 100;
			break;
		}
		if (val->intval < 0)
			val->intval = 0;

		/* Do not adjust SOC when charging: voltage is overrated */
		if (is_charging(cm))
			break;

		/*
		 * If the capacity value is inconsistent, calibrate it base on
		 * the battery voltage values and the thresholds given as desc
		 */
		ret = get_batt_uV(cm, &uV);
		if (ret) {
			/* Voltage information not available. No calibration */
			ret = 0;
			break;
		}

		if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
		    !is_charging(cm)) {
			val->intval = 100;
			break;
		}

		break;
	case POWER_SUPPLY_PROP_ONLINE:
		if (is_ext_pwr_online(cm))
			val->intval = 1;
		else
			val->intval = 0;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL:
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
		if (!fuel_gauge) {
			ret = -ENODEV;
			break;
		}
		ret = power_supply_get_property(fuel_gauge, psp, val);
		break;
	default:
		return -EINVAL;
	}
	if (fuel_gauge)
		power_supply_put(fuel_gauge);
	return ret;
}