5 files changed, 364 insertions, 17 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 33da1127992a..7eda34838bfe 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -82,6 +82,14 @@ config BATTERY_DA9030
           Say Y here to enable support for batteries charger integrated into
           DA9030 PMIC.
 
+config BATTERY_MAX17040
+        tristate "Maxim MAX17040 Fuel Gauge"
+        depends on I2C
+        help
+          MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries
+          in handheld and portable equipment. The MAX17040 is configured
+          to operate with a single lithium cell
+
 config CHARGER_PCF50633
         tristate "NXP PCF50633 MBC"
         depends on MFD_PCF50633
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 2fcf41d13e5c..daf3179689aa 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -25,4 +25,5 @@ obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
 obj-$(CONFIG_BATTERY_WM97XX)    += wm97xx_battery.o
 obj-$(CONFIG_BATTERY_BQ27x00)   += bq27x00_battery.o
 obj-$(CONFIG_BATTERY_DA9030)    += da9030_battery.o
-obj-$(CONFIG_CHARGER_PCF50633)  += pcf50633-charger.o
\ No newline at end of file
+obj-$(CONFIG_BATTERY_MAX17040)  += max17040_battery.o
+obj-$(CONFIG_CHARGER_PCF50633)  += pcf50633-charger.o
diff --git a/drivers/power/da9030_battery.c b/drivers/power/da9030_battery.c
index 1662bb0f23a5..3364198134a1 100644
--- a/drivers/power/da9030_battery.c
+++ b/drivers/power/da9030_battery.c
@@ -22,8 +22,6 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 
-#define DA9030_STATUS_CHDET     (1 << 3)
-
 #define DA9030_FAULT_LOG                0x0a
 #define DA9030_FAULT_LOG_OVER_TEMP      (1 << 7)
 #define DA9030_FAULT_LOG_VBAT_OVER      (1 << 4)
@@ -244,6 +242,8 @@ static void da9030_set_charge(struct da9030_charger *charger, int on)
         }
 
         da903x_write(charger->master, DA9030_CHARGE_CONTROL, val);
+
+        power_supply_changed(&charger->psy);
 }
 
 static void da9030_charger_check_state(struct da9030_charger *charger)
@@ -258,6 +258,12 @@ static void da9030_charger_check_state(struct da9030_charger *charger)
                         da9030_set_charge(charger, 1);
                 }
         } else {
+                /* Charger has been pulled out */
+                if (!charger->chdet) {
+                        da9030_set_charge(charger, 0);
+                        return;
+                }
+
                 if (charger->adc.vbat_res >=
                     charger->thresholds.vbat_charge_stop) {
                         da9030_set_charge(charger, 0);
@@ -395,13 +401,11 @@ static int da9030_battery_event(struct notifier_block *nb, unsigned long event,
 {
         struct da9030_charger *charger =
                 container_of(nb, struct da9030_charger, nb);
-        int status;
 
         switch (event) {
         case DA9030_EVENT_CHDET:
-                status = da903x_query_status(charger->master,
-                                             DA9030_STATUS_CHDET);
-                da9030_set_charge(charger, status);
+                cancel_delayed_work_sync(&charger->work);
+                schedule_work(&charger->work.work);
                 break;
         case DA9030_EVENT_VBATMON:
                 da9030_battery_vbat_event(charger);
@@ -565,7 +569,8 @@ static int da9030_battery_remove(struct platform_device *dev)
         da903x_unregister_notifier(charger->master, &charger->nb,
                                    DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON |
                                    DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT);
-        cancel_delayed_work(&charger->work);
+        cancel_delayed_work_sync(&charger->work);
+        da9030_set_charge(charger, 0);
         power_supply_unregister(&charger->psy);
 
         kfree(charger);
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index a52d4a11652d..520b5c49ff30 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -62,6 +62,10 @@ static unsigned int cache_time = 1000;
 module_param(cache_time, uint, 0644);
 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
 
+static unsigned int pmod_enabled;
+module_param(pmod_enabled, bool, 0644);
+MODULE_PARM_DESC(pmod_enabled, "PMOD enable bit");
+
 /* Some batteries have their rated capacity stored a N * 10 mAh, while
  * others use an index into this table. */
 static int rated_capacities[] = {
@@ -259,6 +263,17 @@ static void ds2760_battery_update_status(struct ds2760_device_info *di)
                 power_supply_changed(&di->bat);
 }
 
+static void ds2760_battery_write_status(struct ds2760_device_info *di,
+                                        char status)
+{
+        if (status == di->raw[DS2760_STATUS_REG])
+                return;
+
+        w1_ds2760_write(di->w1_dev, &status, DS2760_STATUS_WRITE_REG, 1);
+        w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+        w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+}
+
 static void ds2760_battery_work(struct work_struct *work)
 {
         struct ds2760_device_info *di = container_of(work,
@@ -342,9 +357,9 @@ static enum power_supply_property ds2760_battery_props[] = {
 
 static int ds2760_battery_probe(struct platform_device *pdev)
 {
+        char status;
         int retval = 0;
         struct ds2760_device_info *di;
-        struct ds2760_platform_data *pdata;
 
         di = kzalloc(sizeof(*di), GFP_KERNEL);
         if (!di) {
@@ -354,14 +369,13 @@ static int ds2760_battery_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, di);
 
-        pdata = pdev->dev.platform_data;
-        di->dev         = &pdev->dev;
-        di->w1_dev           = pdev->dev.parent;
-        di->bat.name       = dev_name(&pdev->dev);
-        di->bat.type       = POWER_SUPPLY_TYPE_BATTERY;
-        di->bat.properties     = ds2760_battery_props;
-        di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props);
-        di->bat.get_property   = ds2760_battery_get_property;
+        di->dev                 = &pdev->dev;
+        di->w1_dev              = pdev->dev.parent;
+        di->bat.name            = dev_name(&pdev->dev);
+        di->bat.type            = POWER_SUPPLY_TYPE_BATTERY;
+        di->bat.properties      = ds2760_battery_props;
+        di->bat.num_properties  = ARRAY_SIZE(ds2760_battery_props);
+        di->bat.get_property    = ds2760_battery_get_property;
         di->bat.external_power_changed =
                                   ds2760_battery_external_power_changed;
 
@@ -373,6 +387,16 @@ static int ds2760_battery_probe(struct platform_device *pdev)
                 goto batt_failed;
         }
 
+        /* enable sleep mode feature */
+        ds2760_battery_read_status(di);
+        status = di->raw[DS2760_STATUS_REG];
+        if (pmod_enabled)
+                status |= DS2760_STATUS_PMOD;
+        else
+                status &= ~DS2760_STATUS_PMOD;
+
+        ds2760_battery_write_status(di, status);
+
         INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
         di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
         if (!di->monitor_wqueue) {
diff --git a/drivers/power/max17040_battery.c b/drivers/power/max17040_battery.c
new file mode 100644
index 000000000000..87b98bf27ae1
--- /dev/null
+++ b/drivers/power/max17040_battery.c
@@ -0,0 +1,309 @@
+/*
+ *  max17040_battery.c
+ *  fuel-gauge systems for lithium-ion (Li+) batteries
+ *
+ *  Copyright (C) 2009 Samsung Electronics
+ *  Minkyu Kang <mk7.kang@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/power_supply.h>
+#include <linux/max17040_battery.h>
+
+#define MAX17040_VCELL_MSB      0x02
+#define MAX17040_VCELL_LSB      0x03
+#define MAX17040_SOC_MSB        0x04
+#define MAX17040_SOC_LSB        0x05
+#define MAX17040_MODE_MSB       0x06
+#define MAX17040_MODE_LSB       0x07
+#define MAX17040_VER_MSB        0x08
+#define MAX17040_VER_LSB        0x09
+#define MAX17040_RCOMP_MSB      0x0C
+#define MAX17040_RCOMP_LSB      0x0D
+#define MAX17040_CMD_MSB        0xFE
+#define MAX17040_CMD_LSB        0xFF
+
+#define MAX17040_DELAY          1000
+#define MAX17040_BATTERY_FULL   95
+
+struct max17040_chip {
+        struct i2c_client               *client;
+        struct delayed_work             work;
+        struct power_supply             battery;
+        struct max17040_platform_data   *pdata;
+
+        /* State Of Connect */
+        int online;
+        /* battery voltage */
+        int vcell;
+        /* battery capacity */
+        int soc;
+        /* State Of Charge */
+        int status;
+};
+
+static int max17040_get_property(struct power_supply *psy,
+                            enum power_supply_property psp,
+                            union power_supply_propval *val)
+{
+        struct max17040_chip *chip = container_of(psy,
+                                struct max17040_chip, battery);
+
+        switch (psp) {
+        case POWER_SUPPLY_PROP_STATUS:
+                val->intval = chip->status;
+                break;
+        case POWER_SUPPLY_PROP_ONLINE:
+                val->intval = chip->online;
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                val->intval = chip->vcell;
+                break;
+        case POWER_SUPPLY_PROP_CAPACITY:
+                val->intval = chip->soc;
+                break;
+        default:
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static int max17040_write_reg(struct i2c_client *client, int reg, u8 value)
+{
+        int ret;
+
+        ret = i2c_smbus_write_byte_data(client, reg, value);
+
+        if (ret < 0)
+                dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+        return ret;
+}
+
+static int max17040_read_reg(struct i2c_client *client, int reg)
+{
+        int ret;
+
+        ret = i2c_smbus_read_byte_data(client, reg);
+
+        if (ret < 0)
+                dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+        return ret;
+}
+
+static void max17040_reset(struct i2c_client *client)
+{
+        max17040_write_reg(client, MAX17040_CMD_MSB, 0x54);
+        max17040_write_reg(client, MAX17040_CMD_LSB, 0x00);
+}
+
+static void max17040_get_vcell(struct i2c_client *client)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+        u8 msb;
+        u8 lsb;
+
+        msb = max17040_read_reg(client, MAX17040_VCELL_MSB);
+        lsb = max17040_read_reg(client, MAX17040_VCELL_LSB);
+
+        chip->vcell = (msb << 4) + (lsb >> 4);
+}
+
+static void max17040_get_soc(struct i2c_client *client)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+        u8 msb;
+        u8 lsb;
+
+        msb = max17040_read_reg(client, MAX17040_SOC_MSB);
+        lsb = max17040_read_reg(client, MAX17040_SOC_LSB);
+
+        chip->soc = msb;
+}
+
+static void max17040_get_version(struct i2c_client *client)
+{
+        u8 msb;
+        u8 lsb;
+
+        msb = max17040_read_reg(client, MAX17040_VER_MSB);
+        lsb = max17040_read_reg(client, MAX17040_VER_LSB);
+
+        dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver %d%d\n", msb, lsb);
+}
+
+static void max17040_get_online(struct i2c_client *client)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+
+        if (chip->pdata->battery_online)
+                chip->online = chip->pdata->battery_online();
+        else
+                chip->online = 1;
+}
+
+static void max17040_get_status(struct i2c_client *client)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+
+        if (!chip->pdata->charger_online || !chip->pdata->charger_enable) {
+                chip->status = POWER_SUPPLY_STATUS_UNKNOWN;
+                return;
+        }
+
+        if (chip->pdata->charger_online()) {
+                if (chip->pdata->charger_enable())
+                        chip->status = POWER_SUPPLY_STATUS_CHARGING;
+                else
+                        chip->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+        } else {
+                chip->status = POWER_SUPPLY_STATUS_DISCHARGING;
+        }
+
+        if (chip->soc > MAX17040_BATTERY_FULL)
+                chip->status = POWER_SUPPLY_STATUS_FULL;
+}
+
+static void max17040_work(struct work_struct *work)
+{
+        struct max17040_chip *chip;
+
+        chip = container_of(work, struct max17040_chip, work.work);
+
+        max17040_get_vcell(chip->client);
+        max17040_get_soc(chip->client);
+        max17040_get_online(chip->client);
+        max17040_get_status(chip->client);
+
+        schedule_delayed_work(&chip->work, MAX17040_DELAY);
+}
+
+static enum power_supply_property max17040_battery_props[] = {
+        POWER_SUPPLY_PROP_STATUS,
+        POWER_SUPPLY_PROP_ONLINE,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+        POWER_SUPPLY_PROP_CAPACITY,
+};
+
+static int __devinit max17040_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+        struct max17040_chip *chip;
+        int ret;
+
+        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
+                return -EIO;
+
+        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+        if (!chip)
+                return -ENOMEM;
+
+        chip->client = client;
+        chip->pdata = client->dev.platform_data;
+
+        i2c_set_clientdata(client, chip);
+
+        chip->battery.name              = "battery";
+        chip->battery.type              = POWER_SUPPLY_TYPE_BATTERY;
+        chip->battery.get_property      = max17040_get_property;
+        chip->battery.properties        = max17040_battery_props;
+        chip->battery.num_properties    = ARRAY_SIZE(max17040_battery_props);
+
+        ret = power_supply_register(&client->dev, &chip->battery);
+        if (ret) {
+                dev_err(&client->dev, "failed: power supply register\n");
+                i2c_set_clientdata(client, NULL);
+                kfree(chip);
+                return ret;
+        }
+
+        max17040_reset(client);
+        max17040_get_version(client);
+
+        INIT_DELAYED_WORK_DEFERRABLE(&chip->work, max17040_work);
+        schedule_delayed_work(&chip->work, MAX17040_DELAY);
+
+        return 0;
+}
+
+static int __devexit max17040_remove(struct i2c_client *client)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+
+        power_supply_unregister(&chip->battery);
+        cancel_delayed_work(&chip->work);
+        i2c_set_clientdata(client, NULL);
+        kfree(chip);
+        return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int max17040_suspend(struct i2c_client *client,
+                pm_message_t state)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+
+        cancel_delayed_work(&chip->work);
+        return 0;
+}
+
+static int max17040_resume(struct i2c_client *client)
+{
+        struct max17040_chip *chip = i2c_get_clientdata(client);
+
+        schedule_delayed_work(&chip->work, MAX17040_DELAY);
+        return 0;
+}
+
+#else
+
+#define max17040_suspend NULL
+#define max17040_resume NULL
+
+#endif /* CONFIG_PM */
+
+static const struct i2c_device_id max17040_id[] = {
+        { "max17040", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, max17040_id);
+
+static struct i2c_driver max17040_i2c_driver = {
+        .driver = {
+                .name   = "max17040",
+        },
+        .probe          = max17040_probe,
+        .remove         = __devexit_p(max17040_remove),
+        .suspend        = max17040_suspend,
+        .resume         = max17040_resume,
+        .id_table       = max17040_id,
+};
+
+static int __init max17040_init(void)
+{
+        return i2c_add_driver(&max17040_i2c_driver);
+}
+module_init(max17040_init);
+
+static void __exit max17040_exit(void)
+{
+        i2c_del_driver(&max17040_i2c_driver);
+}
+module_exit(max17040_exit);
+
+MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>");
+MODULE_DESCRIPTION("MAX17040 Fuel Gauge");
+MODULE_LICENSE("GPL");