power: supply: macsmc_power: Add AC power supply

Signed-off-by: Hector Martin <marcan@marcan.st>

Author: marcan

drivers/power/supply/macsmc_power.c

@@ -17,11 +17,14 @@
 struct macsmc_power {
 	struct device *dev;
 	struct apple_smc *smc;
-	struct power_supply *psy;
+
+	struct power_supply *batt;
 	char model_name[MAX_STRING_LENGTH];
 	char serial_number[MAX_STRING_LENGTH];
 	char mfg_date[MAX_STRING_LENGTH];
 
+	struct power_supply *ac;
+
 	struct notifier_block nb;
 };
 
@@ -333,7 +336,6 @@ static int macsmc_battery_property_is_writeable(struct power_supply *psy,
 	}
 }
 
-
 static enum power_supply_property macsmc_battery_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_PRESENT,
@@ -374,6 +376,54 @@ static const struct power_supply_desc macsmc_battery_desc = {
 	.num_properties		= ARRAY_SIZE(macsmc_battery_props),
 };
 
+static int macsmc_ac_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct macsmc_power *power = power_supply_get_drvdata(psy);
+	int ret = 0;
+	u16 vu16;
+	u32 vu32;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = apple_smc_read_u32(power->smc, SMC_KEY(CHIS), &vu32);
+		val->intval = !!vu32;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = apple_smc_read_u16(power->smc, SMC_KEY(AC-n), &vu16);
+		val->intval = vu16 * 1000;
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = apple_smc_read_u16(power->smc, SMC_KEY(AC-i), &vu16);
+		val->intval = vu16 * 1000;
+		break;
+	case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT:
+		ret = apple_smc_read_u32(power->smc, SMC_KEY(ACPW), &vu32);
+		val->intval = vu32 * 1000;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property macsmc_ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_INPUT_POWER_LIMIT,
+};
+
+static const struct power_supply_desc macsmc_ac_desc = {
+	.name			= "macsmc-ac",
+	.type			= POWER_SUPPLY_TYPE_MAINS,
+	.get_property		= macsmc_ac_get_property,
+	.properties		= macsmc_ac_props,
+	.num_properties		= ARRAY_SIZE(macsmc_ac_props),
+};
+
 static int macsmc_power_event(struct notifier_block *nb, unsigned long event, void *data)
 {
 	struct macsmc_power *power = container_of(nb, struct macsmc_power, nb);
@@ -382,7 +432,8 @@ static int macsmc_power_event(struct notifier_block *nb, unsigned long event, vo
 		bool charging = (event & 0xff) != 0;
 
 		dev_info(power->dev, "Charging: %d\n", charging);
-		power_supply_changed(power->psy);
+		power_supply_changed(power->batt);
+		power_supply_changed(power->ac);
 
 		return NOTIFY_OK;
 	}
@@ -419,10 +470,17 @@ static int macsmc_power_probe(struct platform_device *pdev)
 	apple_smc_write_u8(power->smc, SMC_KEY(CH0B), 0);
 
 	psy_cfg.drv_data = power;
-	power->psy = devm_power_supply_register(&pdev->dev, &macsmc_battery_desc, &psy_cfg);
-	if (IS_ERR(power->psy)) {
-		dev_err(&pdev->dev, "Failed to register power supply\n");
-		ret = PTR_ERR(power->psy);
+	power->batt = devm_power_supply_register(&pdev->dev, &macsmc_battery_desc, &psy_cfg);
+	if (IS_ERR(power->batt)) {
+		dev_err(&pdev->dev, "Failed to register battery\n");
+		ret = PTR_ERR(power->batt);
+		return ret;
+	}
+
+	power->ac = devm_power_supply_register(&pdev->dev, &macsmc_ac_desc, &psy_cfg);
+	if (IS_ERR(power->ac)) {
+		dev_err(&pdev->dev, "Failed to register AC adapter\n");
+		ret = PTR_ERR(power->ac);
 		return ret;
 	}