1 files changed, 56 insertions, 8 deletions

diff --git a/drivers/power/supply/max77693_charger.c b/drivers/power/supply/max77693_charger.c
index d0157e63b8b5..cdea35c0d1de 100644
--- a/drivers/power/supply/max77693_charger.c
+++ b/drivers/power/supply/max77693_charger.c
@@ -197,12 +197,58 @@ static int max77693_get_online(struct regmap *regmap, int *val)
 	return 0;
 }
 
+/*
+ * There are *two* current limit registers:
+ * - CHGIN limit, which limits the input current from the external charger;
+ * - Fast charge current limit, which limits the current going to the battery.
+ */
+
+static int max77693_get_input_current_limit(struct regmap *regmap, int *val)
+{
+	unsigned int data;
+	int ret;
+
+	ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_CNFG_09, &data);
+	if (ret < 0)
+		return ret;
+
+	data &= CHG_CNFG_09_CHGIN_ILIM_MASK;
+	data >>= CHG_CNFG_09_CHGIN_ILIM_SHIFT;
+
+	if (data <= 0x03)
+		/* The first four values (0x00..0x03) are 60mA */
+		*val = 60000;
+	else
+		*val = data * 20000; /* 20mA steps */
+
+	return 0;
+}
+
+static int max77693_get_fast_charge_current(struct regmap *regmap, int *val)
+{
+	unsigned int data;
+	int ret;
+
+	ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_CNFG_02, &data);
+	if (ret < 0)
+		return ret;
+
+	data &= CHG_CNFG_02_CC_MASK;
+	data >>= CHG_CNFG_02_CC_SHIFT;
+
+	*val = data * 33300; /* 33.3mA steps */
+
+	return 0;
+}
+
 static enum power_supply_property max77693_charger_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_CHARGE_TYPE,
 	POWER_SUPPLY_PROP_HEALTH,
 	POWER_SUPPLY_PROP_PRESENT,
 	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 	POWER_SUPPLY_PROP_MODEL_NAME,
 	POWER_SUPPLY_PROP_MANUFACTURER,
 };
@@ -231,6 +277,12 @@ static int max77693_charger_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_ONLINE:
 		ret = max77693_get_online(regmap, &val->intval);
 		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = max77693_get_input_current_limit(regmap, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		ret = max77693_get_fast_charge_current(regmap, &val->intval);
+		break;
 	case POWER_SUPPLY_PROP_MODEL_NAME:
 		val->strval = max77693_charger_model;
 		break;
@@ -709,9 +761,9 @@ static int max77693_charger_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	chg->charger = power_supply_register(&pdev->dev,
-						&max77693_charger_desc,
-						&psy_cfg);
+	chg->charger = devm_power_supply_register(&pdev->dev,
+						  &max77693_charger_desc,
+						  &psy_cfg);
 	if (IS_ERR(chg->charger)) {
 		dev_err(&pdev->dev, "failed: power supply register\n");
 		ret = PTR_ERR(chg->charger);
@@ -730,13 +782,9 @@ err:
 
 static void max77693_charger_remove(struct platform_device *pdev)
 {
-	struct max77693_charger *chg = platform_get_drvdata(pdev);
-
 	device_remove_file(&pdev->dev, &dev_attr_top_off_timer);
 	device_remove_file(&pdev->dev, &dev_attr_top_off_threshold_current);
 	device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
-
-	power_supply_unregister(chg->charger);
 }
 
 static const struct platform_device_id max77693_charger_id[] = {
@@ -750,7 +798,7 @@ static struct platform_driver max77693_charger_driver = {
 		.name	= "max77693-charger",
 	},
 	.probe		= max77693_charger_probe,
-	.remove_new	= max77693_charger_remove,
+	.remove		= max77693_charger_remove,
 	.id_table	= max77693_charger_id,
 };
 module_platform_driver(max77693_charger_driver);