diff options
Diffstat (limited to 'drivers/power/supply/max77693_charger.c')
| -rw-r--r-- | drivers/power/supply/max77693_charger.c | 74 |
1 files changed, 60 insertions, 14 deletions
diff --git a/drivers/power/supply/max77693_charger.c b/drivers/power/supply/max77693_charger.c index a2c5c9858639..027d6a539b65 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; @@ -296,7 +348,7 @@ static ssize_t fast_charge_timer_show(struct device *dev, break; } - return scnprintf(buf, PAGE_SIZE, "%u\n", val); + return sysfs_emit(buf, "%u\n", val); } static int max77693_set_fast_charge_timer(struct max77693_charger *chg, @@ -357,7 +409,7 @@ static ssize_t top_off_threshold_current_show(struct device *dev, else val = data * 50000; - return scnprintf(buf, PAGE_SIZE, "%u\n", val); + return sysfs_emit(buf, "%u\n", val); } static int max77693_set_top_off_threshold_current(struct max77693_charger *chg, @@ -405,7 +457,7 @@ static ssize_t top_off_timer_show(struct device *dev, val = data * 10; - return scnprintf(buf, PAGE_SIZE, "%u\n", val); + return sysfs_emit(buf, "%u\n", val); } static int max77693_set_top_off_timer(struct max77693_charger *chg, @@ -556,7 +608,7 @@ static int max77693_set_charge_input_threshold_volt(struct max77693_charger *chg case 4700000: case 4800000: case 4900000: - data = (uvolt - 4700000) / 100000; + data = ((uvolt - 4700000) / 100000) + 1; break; default: dev_err(chg->dev, "Wrong value for charge input voltage regulation threshold\n"); @@ -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); @@ -728,17 +780,11 @@ err: return ret; } -static int max77693_charger_remove(struct platform_device *pdev) +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); - - return 0; } static const struct platform_device_id max77693_charger_id[] = { |