Merge git://git.infradead.org/battery-2.6

* git://git.infradead.org/battery-2.6:
  power_supply: Add driver for the PMU on WM831x PMICs
  ds2760_battery: Fix integer overflow for time_to_empty_now
  wm97xx_battery: Convert to dev_pm_ops
  wm97xx_battery: Use irq to detect charger state
  wm97xx_battery: Use platform_data
  wm97xx-core: Pass platform_data to battery
  ds2760_battery: implement set_charged() feature
  power_supply: get_by_name and set_charged functionality
  power_supply: EXPORT_SYMBOL cleanups
  ds2760_battery: add current_accum module parameter
  ds2760_battery: handle full_active_uAh == 0 case correctly
  ds2760_battery: add rated_capacity module parameter
  ds2760_battery: export more features
  ds2760_battery: delay power supply registration
  wm8350_power: Implement charge type property
  power_supply: Add a charge_type property, and use it for olpc driver
  olpc_battery: Add an 'error' sysfs device that displays raw errors
  Revert "power: remove POWER_SUPPLY_PROP_CAPACITY_LEVEL"

10 files changed, 1092 insertions, 52 deletions

diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
index 252eb11fe9db..f944918466e5 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -561,6 +561,7 @@ static void wm97xx_ts_input_close(struct input_dev *idev)
 static int wm97xx_probe(struct device *dev)
 {
         struct wm97xx *wm;
+        struct wm97xx_pdata *pdata = dev->platform_data;
         int ret = 0, id = 0;
 
         wm = kzalloc(sizeof(struct wm97xx), GFP_KERNEL);
@@ -658,6 +659,7 @@ static int wm97xx_probe(struct device *dev)
         }
         platform_set_drvdata(wm->battery_dev, wm);
         wm->battery_dev->dev.parent = dev;
+        wm->battery_dev->dev.platform_data = pdata;
         ret = platform_device_add(wm->battery_dev);
         if (ret < 0)
                 goto batt_reg_err;
@@ -671,6 +673,7 @@ static int wm97xx_probe(struct device *dev)
         }
         platform_set_drvdata(wm->touch_dev, wm);
         wm->touch_dev->dev.parent = dev;
+        wm->touch_dev->dev.platform_data = pdata;
         ret = platform_device_add(wm->touch_dev);
         if (ret < 0)
                 goto touch_reg_err;
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index bdbc4f73fcdc..cea6cef27e89 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -29,6 +29,13 @@ config APM_POWER
           Say Y here to enable support APM status emulation using
           battery class devices.
 
+config WM831X_POWER
+        tristate "WM831X PMU support"
+        depends on MFD_WM831X
+        help
+          Say Y here to enable support for the power management unit
+          provided by Wolfson Microelectronics WM831x PMICs.
+
 config WM8350_POWER
         tristate "WM8350 PMU support"
         depends on MFD_WM8350
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 380d17c9ae29..b96f29d91c28 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_POWER_SUPPLY)	+= power_supply.o
 
 obj-$(CONFIG_PDA_POWER)         += pda_power.o
 obj-$(CONFIG_APM_POWER)         += apm_power.o
+obj-$(CONFIG_WM831X_POWER)      += wm831x_power.o
 obj-$(CONFIG_WM8350_POWER)      += wm8350_power.o
 
 obj-$(CONFIG_BATTERY_DS2760)    += ds2760_battery.o
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index 520b5c49ff30..6f1dba5a519d 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -56,6 +56,7 @@ struct ds2760_device_info {
         struct device *w1_dev;
         struct workqueue_struct *monitor_wqueue;
         struct delayed_work monitor_work;
+        struct delayed_work set_charged_work;
 };
 
 static unsigned int cache_time = 1000;
@@ -66,6 +67,14 @@ static unsigned int pmod_enabled;
 module_param(pmod_enabled, bool, 0644);
 MODULE_PARM_DESC(pmod_enabled, "PMOD enable bit");
 
+static unsigned int rated_capacity;
+module_param(rated_capacity, uint, 0644);
+MODULE_PARM_DESC(rated_capacity, "rated battery capacity, 10*mAh or index");
+
+static unsigned int current_accum;
+module_param(current_accum, uint, 0644);
+MODULE_PARM_DESC(current_accum, "current accumulator value");
+
 /* Some batteries have their rated capacity stored a N * 10 mAh, while
  * others use an index into this table. */
 static int rated_capacities[] = {
@@ -168,8 +177,13 @@ static int ds2760_battery_read_status(struct ds2760_device_info *di)
         di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 |
                               di->raw[DS2760_ACTIVE_FULL + 1];
 
-        scale[0] = di->raw[DS2760_ACTIVE_FULL] << 8 |
-                   di->raw[DS2760_ACTIVE_FULL + 1];
+        /* If the full_active_uAh value is not given, fall back to the rated
+         * capacity. This is likely to happen when chips are not part of the
+         * battery pack and is therefore not bootstrapped. */
+        if (di->full_active_uAh == 0)
+                di->full_active_uAh = di->rated_capacity / 1000L;
+
+        scale[0] = di->full_active_uAh;
         for (i = 1; i < 5; i++)
                 scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 2 + i];
 
@@ -197,15 +211,31 @@ static int ds2760_battery_read_status(struct ds2760_device_info *di)
         if (di->rem_capacity > 100)
                 di->rem_capacity = 100;
 
-        if (di->current_uA)
-                di->life_sec = -((di->accum_current_uAh - di->empty_uAh) *
-                                 3600L) / di->current_uA;
+        if (di->current_uA >= 100L)
+                di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 36L)
+                                        / (di->current_uA / 100L);
         else
                 di->life_sec = 0;
 
         return 0;
 }
 
+static void ds2760_battery_set_current_accum(struct ds2760_device_info *di,
+                                             unsigned int acr_val)
+{
+        unsigned char acr[2];
+
+        /* acr is in units of 0.25 mAh */
+        acr_val *= 4L;
+        acr_val /= 1000;
+
+        acr[0] = acr_val >> 8;
+        acr[1] = acr_val & 0xff;
+
+        if (w1_ds2760_write(di->w1_dev, acr, DS2760_CURRENT_ACCUM_MSB, 2) < 2)
+                dev_warn(di->dev, "ACR write failed\n");
+}
+
 static void ds2760_battery_update_status(struct ds2760_device_info *di)
 {
         int old_charge_status = di->charge_status;
@@ -237,21 +267,9 @@ static void ds2760_battery_update_status(struct ds2760_device_info *di)
                         if (di->full_counter < 2) {
                                 di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
                         } else {
-                                unsigned char acr[2];
-                                int acr_val;
-
-                                /* acr is in units of 0.25 mAh */
-                                acr_val = di->full_active_uAh * 4L / 1000;
-
-                                acr[0] = acr_val >> 8;
-                                acr[1] = acr_val & 0xff;
-
-                                if (w1_ds2760_write(di->w1_dev, acr,
-                                    DS2760_CURRENT_ACCUM_MSB, 2) < 2)
-                                        dev_warn(di->dev,
-                                                 "ACR reset failed\n");
-
                                 di->charge_status = POWER_SUPPLY_STATUS_FULL;
+                                ds2760_battery_set_current_accum(di,
+                                                di->full_active_uAh);
                         }
                 }
         } else {
@@ -274,6 +292,17 @@ static void ds2760_battery_write_status(struct ds2760_device_info *di,
         w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
 }
 
+static void ds2760_battery_write_rated_capacity(struct ds2760_device_info *di,
+                                                unsigned char rated_capacity)
+{
+        if (rated_capacity == di->raw[DS2760_RATED_CAPACITY])
+                return;
+
+        w1_ds2760_write(di->w1_dev, &rated_capacity, DS2760_RATED_CAPACITY, 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,
@@ -299,6 +328,52 @@ static void ds2760_battery_external_power_changed(struct power_supply *psy)
         queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
 }
 
+
+static void ds2760_battery_set_charged_work(struct work_struct *work)
+{
+        char bias;
+        struct ds2760_device_info *di = container_of(work,
+                struct ds2760_device_info, set_charged_work.work);
+
+        dev_dbg(di->dev, "%s\n", __func__);
+
+        ds2760_battery_read_status(di);
+
+        /* When we get notified by external circuitry that the battery is
+         * considered fully charged now, we know that there is no current
+         * flow any more. However, the ds2760's internal current meter is
+         * too inaccurate to rely on - spec say something ~15% failure.
+         * Hence, we use the current offset bias register to compensate
+         * that error.
+         */
+
+        if (!power_supply_am_i_supplied(&di->bat))
+                return;
+
+        bias = (signed char) di->current_raw +
+                (signed char) di->raw[DS2760_CURRENT_OFFSET_BIAS];
+
+        dev_dbg(di->dev, "%s: bias = %d\n", __func__, bias);
+
+        w1_ds2760_write(di->w1_dev, &bias, DS2760_CURRENT_OFFSET_BIAS, 1);
+        w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+        w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+
+        /* Write to the di->raw[] buffer directly - the CURRENT_OFFSET_BIAS
+         * value won't be read back by ds2760_battery_read_status() */
+        di->raw[DS2760_CURRENT_OFFSET_BIAS] = bias;
+}
+
+static void ds2760_battery_set_charged(struct power_supply *psy)
+{
+        struct ds2760_device_info *di = to_ds2760_device_info(psy);
+
+        /* postpone the actual work by 20 secs. This is for debouncing GPIO
+         * signals and to let the current value settle. See AN4188. */
+        cancel_delayed_work(&di->set_charged_work);
+        queue_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
+}
+
 static int ds2760_battery_get_property(struct power_supply *psy,
                                        enum power_supply_property psp,
                                        union power_supply_propval *val)
@@ -337,6 +412,12 @@ static int ds2760_battery_get_property(struct power_supply *psy,
         case POWER_SUPPLY_PROP_TEMP:
                 val->intval = di->temp_C;
                 break;
+        case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
+                val->intval = di->life_sec;
+                break;
+        case POWER_SUPPLY_PROP_CAPACITY:
+                val->intval = di->rem_capacity;
+                break;
         default:
                 return -EINVAL;
         }
@@ -353,6 +434,8 @@ static enum power_supply_property ds2760_battery_props[] = {
         POWER_SUPPLY_PROP_CHARGE_EMPTY,
         POWER_SUPPLY_PROP_CHARGE_NOW,
         POWER_SUPPLY_PROP_TEMP,
+        POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+        POWER_SUPPLY_PROP_CAPACITY,
 };
 
 static int ds2760_battery_probe(struct platform_device *pdev)
@@ -376,17 +459,12 @@ static int ds2760_battery_probe(struct platform_device *pdev)
         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.set_charged     = ds2760_battery_set_charged;
         di->bat.external_power_changed =
                                   ds2760_battery_external_power_changed;
 
         di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
 
-        retval = power_supply_register(&pdev->dev, &di->bat);
-        if (retval) {
-                dev_err(di->dev, "failed to register battery\n");
-                goto batt_failed;
-        }
-
         /* enable sleep mode feature */
         ds2760_battery_read_status(di);
         status = di->raw[DS2760_STATUS_REG];
@@ -397,7 +475,24 @@ static int ds2760_battery_probe(struct platform_device *pdev)
 
         ds2760_battery_write_status(di, status);
 
+        /* set rated capacity from module param */
+        if (rated_capacity)
+                ds2760_battery_write_rated_capacity(di, rated_capacity);
+
+        /* set current accumulator if given as parameter.
+         * this should only be done for bootstrapping the value */
+        if (current_accum)
+                ds2760_battery_set_current_accum(di, current_accum);
+
+        retval = power_supply_register(&pdev->dev, &di->bat);
+        if (retval) {
+                dev_err(di->dev, "failed to register battery\n");
+                goto batt_failed;
+        }
+
         INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
+        INIT_DELAYED_WORK(&di->set_charged_work,
+                          ds2760_battery_set_charged_work);
         di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
         if (!di->monitor_wqueue) {
                 retval = -ESRCH;
@@ -422,6 +517,8 @@ static int ds2760_battery_remove(struct platform_device *pdev)
 
         cancel_rearming_delayed_workqueue(di->monitor_wqueue,
                                           &di->monitor_work);
+        cancel_rearming_delayed_workqueue(di->monitor_wqueue,
+                                          &di->set_charged_work);
         destroy_workqueue(di->monitor_wqueue);
         power_supply_unregister(&di->bat);
 
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 58e419299cd6..8fefe5a73558 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -10,7 +10,9 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/types.h>
 #include <linux/err.h>
+#include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/jiffies.h>
@@ -231,6 +233,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
                 if (ret)
                         return ret;
                 break;
+        case POWER_SUPPLY_PROP_CHARGE_TYPE:
+                if (ec_byte & BAT_STAT_TRICKLE)
+                        val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+                else if (ec_byte & BAT_STAT_CHARGING)
+                        val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+                else
+                        val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+                break;
         case POWER_SUPPLY_PROP_PRESENT:
                 val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
                                             BAT_STAT_TRICKLE));
@@ -276,6 +286,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
                         return ret;
                 val->intval = ec_byte;
                 break;
+        case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+                if (ec_byte & BAT_STAT_FULL)
+                        val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+                else if (ec_byte & BAT_STAT_LOW)
+                        val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+                else
+                        val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+                break;
         case POWER_SUPPLY_PROP_TEMP:
                 ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
                 if (ret)
@@ -315,12 +333,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
 
 static enum power_supply_property olpc_bat_props[] = {
         POWER_SUPPLY_PROP_STATUS,
+        POWER_SUPPLY_PROP_CHARGE_TYPE,
         POWER_SUPPLY_PROP_PRESENT,
         POWER_SUPPLY_PROP_HEALTH,
         POWER_SUPPLY_PROP_TECHNOLOGY,
         POWER_SUPPLY_PROP_VOLTAGE_AVG,
         POWER_SUPPLY_PROP_CURRENT_AVG,
         POWER_SUPPLY_PROP_CAPACITY,
+        POWER_SUPPLY_PROP_CAPACITY_LEVEL,
         POWER_SUPPLY_PROP_TEMP,
         POWER_SUPPLY_PROP_TEMP_AMBIENT,
         POWER_SUPPLY_PROP_MANUFACTURER,
@@ -370,6 +390,29 @@ static struct bin_attribute olpc_bat_eeprom = {
         .read = olpc_bat_eeprom_read,
 };
 
+/* Allow userspace to see the specific error value pulled from the EC */
+
+static ssize_t olpc_bat_error_read(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        uint8_t ec_byte;
+        ssize_t ret;
+
+        ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+        if (ret < 0)
+                return ret;
+
+        return sprintf(buf, "%d\n", ec_byte);
+}
+
+static struct device_attribute olpc_bat_error = {
+        .attr = {
+                .name = "error",
+                .mode = S_IRUGO,
+        },
+        .show = olpc_bat_error_read,
+};
+
 /*********************************************************************
  *              Initialisation
  *********************************************************************/
@@ -433,8 +476,14 @@ static int __init olpc_bat_init(void)
         if (ret)
                 goto eeprom_failed;
 
+        ret = device_create_file(olpc_bat.dev, &olpc_bat_error);
+        if (ret)
+                goto error_failed;
+
         goto success;
 
+error_failed:
+        device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
 eeprom_failed:
         power_supply_unregister(&olpc_bat);
 battery_failed:
@@ -447,6 +496,7 @@ success:
 
 static void __exit olpc_bat_exit(void)
 {
+        device_remove_file(olpc_bat.dev, &olpc_bat_error);
         device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
         power_supply_unregister(&olpc_bat);
         power_supply_unregister(&olpc_ac);
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 5520040449c4..cce75b40b435 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -18,7 +18,9 @@
 #include <linux/power_supply.h>
 #include "power_supply.h"
 
+/* exported for the APM Power driver, APM emulation */
 struct class *power_supply_class;
+EXPORT_SYMBOL_GPL(power_supply_class);
 
 static int __power_supply_changed_work(struct device *dev, void *data)
 {
@@ -55,6 +57,7 @@ void power_supply_changed(struct power_supply *psy)
 
         schedule_work(&psy->changed_work);
 }
+EXPORT_SYMBOL_GPL(power_supply_changed);
 
 static int __power_supply_am_i_supplied(struct device *dev, void *data)
 {
@@ -86,6 +89,7 @@ int power_supply_am_i_supplied(struct power_supply *psy)
 
         return error;
 }
+EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);
 
 static int __power_supply_is_system_supplied(struct device *dev, void *data)
 {
@@ -110,6 +114,35 @@ int power_supply_is_system_supplied(void)
 
         return error;
 }
+EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
+
+int power_supply_set_battery_charged(struct power_supply *psy)
+{
+        if (psy->type == POWER_SUPPLY_TYPE_BATTERY && psy->set_charged) {
+                psy->set_charged(psy);
+                return 0;
+        }
+
+        return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(power_supply_set_battery_charged);
+
+static int power_supply_match_device_by_name(struct device *dev, void *data)
+{
+        const char *name = data;
+        struct power_supply *psy = dev_get_drvdata(dev);
+
+        return strcmp(psy->name, name) == 0;
+}
+
+struct power_supply *power_supply_get_by_name(char *name)
+{
+        struct device *dev = class_find_device(power_supply_class, NULL, name,
+                                        power_supply_match_device_by_name);
+
+        return dev ? dev_get_drvdata(dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_name);
 
 int power_supply_register(struct device *parent, struct power_supply *psy)
 {
@@ -144,6 +177,7 @@ dev_create_failed:
 success:
         return rc;
 }
+EXPORT_SYMBOL_GPL(power_supply_register);
 
 void power_supply_unregister(struct power_supply *psy)
 {
@@ -152,6 +186,7 @@ void power_supply_unregister(struct power_supply *psy)
         power_supply_remove_attrs(psy);
         device_unregister(psy->dev);
 }
+EXPORT_SYMBOL_GPL(power_supply_unregister);
 
 static int __init power_supply_class_init(void)
 {
@@ -170,15 +205,6 @@ static void __exit power_supply_class_exit(void)
         class_destroy(power_supply_class);
 }
 
-EXPORT_SYMBOL_GPL(power_supply_changed);
-EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);
-EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
-EXPORT_SYMBOL_GPL(power_supply_register);
-EXPORT_SYMBOL_GPL(power_supply_unregister);
-
-/* exported for the APM Power driver, APM emulation */
-EXPORT_SYMBOL_GPL(power_supply_class);
-
 subsys_initcall(power_supply_class_init);
 module_exit(power_supply_class_exit);
 
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index da73591017f9..08144393d64b 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -43,6 +43,9 @@ static ssize_t power_supply_show_property(struct device *dev,
         static char *status_text[] = {
                 "Unknown", "Charging", "Discharging", "Not charging", "Full"
         };
+        static char *charge_type[] = {
+                "Unknown", "N/A", "Trickle", "Fast"
+        };
         static char *health_text[] = {
                 "Unknown", "Good", "Overheat", "Dead", "Over voltage",
                 "Unspecified failure", "Cold",
@@ -51,6 +54,9 @@ static ssize_t power_supply_show_property(struct device *dev,
                 "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
                 "LiMn"
         };
+        static char *capacity_level_text[] = {
+                "Unknown", "Critical", "Low", "Normal", "High", "Full"
+        };
         ssize_t ret;
         struct power_supply *psy = dev_get_drvdata(dev);
         const ptrdiff_t off = attr - power_supply_attrs;
@@ -67,10 +73,14 @@ static ssize_t power_supply_show_property(struct device *dev,
 
         if (off == POWER_SUPPLY_PROP_STATUS)
                 return sprintf(buf, "%s\n", status_text[value.intval]);
+        else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
+                return sprintf(buf, "%s\n", charge_type[value.intval]);
         else if (off == POWER_SUPPLY_PROP_HEALTH)
                 return sprintf(buf, "%s\n", health_text[value.intval]);
         else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
                 return sprintf(buf, "%s\n", technology_text[value.intval]);
+        else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
+                return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
         else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
                 return sprintf(buf, "%s\n", value.strval);
 
@@ -81,6 +91,7 @@ static ssize_t power_supply_show_property(struct device *dev,
 static struct device_attribute power_supply_attrs[] = {
         /* Properties of type `int' */
         POWER_SUPPLY_ATTR(status),
+        POWER_SUPPLY_ATTR(charge_type),
         POWER_SUPPLY_ATTR(health),
         POWER_SUPPLY_ATTR(present),
         POWER_SUPPLY_ATTR(online),
@@ -109,6 +120,7 @@ static struct device_attribute power_supply_attrs[] = {
         POWER_SUPPLY_ATTR(energy_now),
         POWER_SUPPLY_ATTR(energy_avg),
         POWER_SUPPLY_ATTR(capacity),
+        POWER_SUPPLY_ATTR(capacity_level),
         POWER_SUPPLY_ATTR(temp),
         POWER_SUPPLY_ATTR(temp_ambient),
         POWER_SUPPLY_ATTR(time_to_empty_now),
diff --git a/drivers/power/wm831x_power.c b/drivers/power/wm831x_power.c
new file mode 100644
index 000000000000..2a4c8b0b829c
--- /dev/null
+++ b/drivers/power/wm831x_power.c
@@ -0,0 +1,779 @@
+/*
+ * PMU driver for Wolfson Microelectronics wm831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * 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/err.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/auxadc.h>
+#include <linux/mfd/wm831x/pmu.h>
+#include <linux/mfd/wm831x/pdata.h>
+
+struct wm831x_power {
+        struct wm831x *wm831x;
+        struct power_supply wall;
+        struct power_supply backup;
+        struct power_supply usb;
+        struct power_supply battery;
+};
+
+static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
+                                     union power_supply_propval *val)
+{
+        int ret;
+
+        ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
+        if (ret < 0)
+                return ret;
+
+        if (ret & supply)
+                val->intval = 1;
+        else
+                val->intval = 0;
+
+        return 0;
+}
+
+static int wm831x_power_read_voltage(struct wm831x *wm831x,
+                                     enum wm831x_auxadc src,
+                                     union power_supply_propval *val)
+{
+        int ret;
+
+        ret = wm831x_auxadc_read_uv(wm831x, src);
+        if (ret >= 0)
+                val->intval = ret;
+
+        return ret;
+}
+
+/*********************************************************************
+ *              WALL Power
+ *********************************************************************/
+static int wm831x_wall_get_prop(struct power_supply *psy,
+                                enum power_supply_property psp,
+                                union power_supply_propval *val)
+{
+        struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+        struct wm831x *wm831x = wm831x_power->wm831x;
+        int ret = 0;
+
+        switch (psp) {
+        case POWER_SUPPLY_PROP_ONLINE:
+                ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
+}
+
+static enum power_supply_property wm831x_wall_props[] = {
+        POWER_SUPPLY_PROP_ONLINE,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ *              USB Power
+ *********************************************************************/
+static int wm831x_usb_get_prop(struct power_supply *psy,
+                               enum power_supply_property psp,
+                               union power_supply_propval *val)
+{
+        struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+        struct wm831x *wm831x = wm831x_power->wm831x;
+        int ret = 0;
+
+        switch (psp) {
+        case POWER_SUPPLY_PROP_ONLINE:
+                ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
+}
+
+static enum power_supply_property wm831x_usb_props[] = {
+        POWER_SUPPLY_PROP_ONLINE,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ *              Battery properties
+ *********************************************************************/
+
+struct chg_map {
+        int val;
+        int reg_val;
+};
+
+static struct chg_map trickle_ilims[] = {
+        {  50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
+        { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
+        { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
+        { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
+};
+
+static struct chg_map vsels[] = {
+        { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
+        { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
+        { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
+        { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
+};
+
+static struct chg_map fast_ilims[] = {
+        {    0,  0 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {   50,  1 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  100,  2 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  150,  3 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  200,  4 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  250,  5 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  300,  6 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  350,  7 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  400,  8 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  450,  9 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
+        {  900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
+        { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
+};
+
+static struct chg_map eoc_iterms[] = {
+        { 20, 0 << WM831X_CHG_ITERM_SHIFT },
+        { 30, 1 << WM831X_CHG_ITERM_SHIFT },
+        { 40, 2 << WM831X_CHG_ITERM_SHIFT },
+        { 50, 3 << WM831X_CHG_ITERM_SHIFT },
+        { 60, 4 << WM831X_CHG_ITERM_SHIFT },
+        { 70, 5 << WM831X_CHG_ITERM_SHIFT },
+        { 80, 6 << WM831X_CHG_ITERM_SHIFT },
+        { 90, 7 << WM831X_CHG_ITERM_SHIFT },
+};
+
+static struct chg_map chg_times[] = {
+        {  60,  0 << WM831X_CHG_TIME_SHIFT },
+        {  90,  1 << WM831X_CHG_TIME_SHIFT },
+        { 120,  2 << WM831X_CHG_TIME_SHIFT },
+        { 150,  3 << WM831X_CHG_TIME_SHIFT },
+        { 180,  4 << WM831X_CHG_TIME_SHIFT },
+        { 210,  5 << WM831X_CHG_TIME_SHIFT },
+        { 240,  6 << WM831X_CHG_TIME_SHIFT },
+        { 270,  7 << WM831X_CHG_TIME_SHIFT },
+        { 300,  8 << WM831X_CHG_TIME_SHIFT },
+        { 330,  9 << WM831X_CHG_TIME_SHIFT },
+        { 360, 10 << WM831X_CHG_TIME_SHIFT },
+        { 390, 11 << WM831X_CHG_TIME_SHIFT },
+        { 420, 12 << WM831X_CHG_TIME_SHIFT },
+        { 450, 13 << WM831X_CHG_TIME_SHIFT },
+        { 480, 14 << WM831X_CHG_TIME_SHIFT },
+        { 510, 15 << WM831X_CHG_TIME_SHIFT },
+};
+
+static void wm831x_battey_apply_config(struct wm831x *wm831x,
+                                       struct chg_map *map, int count, int val,
+                                       int *reg, const char *name,
+                                       const char *units)
+{
+        int i;
+
+        for (i = 0; i < count; i++)
+                if (val == map[i].val)
+                        break;
+        if (i == count) {
+                dev_err(wm831x->dev, "Invalid %s %d%s\n",
+                        name, val, units);
+        } else {
+                *reg |= map[i].reg_val;
+                dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
+        }
+}
+
+static void wm831x_config_battery(struct wm831x *wm831x)
+{
+        struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+        struct wm831x_battery_pdata *pdata;
+        int ret, reg1, reg2;
+
+        if (!wm831x_pdata || !wm831x_pdata->battery) {
+                dev_warn(wm831x->dev,
+                         "No battery charger configuration\n");
+                return;
+        }
+
+        pdata = wm831x_pdata->battery;
+
+        reg1 = 0;
+        reg2 = 0;
+
+        if (!pdata->enable) {
+                dev_info(wm831x->dev, "Battery charger disabled\n");
+                return;
+        }
+
+        reg1 |= WM831X_CHG_ENA;
+        if (pdata->off_mask)
+                reg2 |= WM831X_CHG_OFF_MSK;
+        if (pdata->fast_enable)
+                reg1 |= WM831X_CHG_FAST;
+
+        wm831x_battey_apply_config(wm831x, trickle_ilims,
+                                   ARRAY_SIZE(trickle_ilims),
+                                   pdata->trickle_ilim, &reg2,
+                                   "trickle charge current limit", "mA");
+
+        wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
+                                   pdata->vsel, &reg2,
+                                   "target voltage", "mV");
+
+        wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
+                                   pdata->fast_ilim, &reg2,
+                                   "fast charge current limit", "mA");
+
+        wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
+                                   pdata->eoc_iterm, &reg1,
+                                   "end of charge current threshold", "mA");
+
+        wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
+                                   pdata->timeout, &reg2,
+                                   "charger timeout", "min");
+
+        ret = wm831x_reg_unlock(wm831x);
+        if (ret != 0) {
+                dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
+                return;
+        }
+
+        ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
+                              WM831X_CHG_ENA_MASK |
+                              WM831X_CHG_FAST_MASK |
+                              WM831X_CHG_ITERM_MASK |
+                              WM831X_CHG_ITERM_MASK,
+                              reg1);
+        if (ret != 0)
+                dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
+                        ret);
+
+        ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
+                              WM831X_CHG_OFF_MSK |
+                              WM831X_CHG_TIME_MASK |
+                              WM831X_CHG_FAST_ILIM_MASK |
+                              WM831X_CHG_TRKL_ILIM_MASK |
+                              WM831X_CHG_VSEL_MASK,
+                              reg2);
+        if (ret != 0)
+                dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
+                        ret);
+
+        wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
+{
+        int ret;
+
+        ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
+        if (ret < 0)
+                return ret;
+
+        if (ret & WM831X_PWR_SRC_BATT) {
+                *status = POWER_SUPPLY_STATUS_DISCHARGING;
+                return 0;
+        }
+
+        ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+        if (ret < 0)
+                return ret;
+
+        switch (ret & WM831X_CHG_STATE_MASK) {
+        case WM831X_CHG_STATE_OFF:
+                *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+                break;
+        case WM831X_CHG_STATE_TRICKLE:
+        case WM831X_CHG_STATE_FAST:
+                *status = POWER_SUPPLY_STATUS_CHARGING;
+                break;
+
+        default:
+                *status = POWER_SUPPLY_STATUS_UNKNOWN;
+                break;
+        }
+
+        return 0;
+}
+
+static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
+{
+        int ret;
+
+        ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+        if (ret < 0)
+                return ret;
+
+        switch (ret & WM831X_CHG_STATE_MASK) {
+        case WM831X_CHG_STATE_TRICKLE:
+        case WM831X_CHG_STATE_TRICKLE_OT:
+                *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+                break;
+        case WM831X_CHG_STATE_FAST:
+        case WM831X_CHG_STATE_FAST_OT:
+                *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+                break;
+        default:
+                *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+                break;
+        }
+
+        return 0;
+}
+
+static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
+{
+        int ret;
+
+        ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+        if (ret < 0)
+                return ret;
+
+        if (ret & WM831X_BATT_HOT_STS) {
+                *health = POWER_SUPPLY_HEALTH_OVERHEAT;
+                return 0;
+        }
+
+        if (ret & WM831X_BATT_COLD_STS) {
+                *health = POWER_SUPPLY_HEALTH_COLD;
+                return 0;
+        }
+
+        if (ret & WM831X_BATT_OV_STS) {
+                *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+                return 0;
+        }
+
+        switch (ret & WM831X_CHG_STATE_MASK) {
+        case WM831X_CHG_STATE_TRICKLE_OT:
+        case WM831X_CHG_STATE_FAST_OT:
+                *health = POWER_SUPPLY_HEALTH_OVERHEAT;
+                break;
+        case WM831X_CHG_STATE_DEFECTIVE:
+                *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+                break;
+        default:
+                *health = POWER_SUPPLY_HEALTH_GOOD;
+                break;
+        }
+
+        return 0;
+}
+
+static int wm831x_bat_get_prop(struct power_supply *psy,
+                               enum power_supply_property psp,
+                               union power_supply_propval *val)
+{
+        struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+        struct wm831x *wm831x = wm831x_power->wm831x;
+        int ret = 0;
+
+        switch (psp) {
+        case POWER_SUPPLY_PROP_STATUS:
+                ret = wm831x_bat_check_status(wm831x, &val->intval);
+                break;
+        case POWER_SUPPLY_PROP_ONLINE:
+                ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
+                                                val);
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
+                break;
+        case POWER_SUPPLY_PROP_HEALTH:
+                ret = wm831x_bat_check_health(wm831x, &val->intval);
+                break;
+        case POWER_SUPPLY_PROP_CHARGE_TYPE:
+                ret = wm831x_bat_check_type(wm831x, &val->intval);
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
+}
+
+static enum power_supply_property wm831x_bat_props[] = {
+        POWER_SUPPLY_PROP_STATUS,
+        POWER_SUPPLY_PROP_ONLINE,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+        POWER_SUPPLY_PROP_HEALTH,
+        POWER_SUPPLY_PROP_CHARGE_TYPE,
+};
+
+static const char *wm831x_bat_irqs[] = {
+        "BATT HOT",
+        "BATT COLD",
+        "BATT FAIL",
+        "OV",
+        "END",
+        "TO",
+        "MODE",
+        "START",
+};
+
+static irqreturn_t wm831x_bat_irq(int irq, void *data)
+{
+        struct wm831x_power *wm831x_power = data;
+        struct wm831x *wm831x = wm831x_power->wm831x;
+
+        dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq);
+
+        /* The battery charger is autonomous so we don't need to do
+         * anything except kick user space */
+        power_supply_changed(&wm831x_power->battery);
+
+        return IRQ_HANDLED;
+}
+
+
+/*********************************************************************
+ *              Backup supply properties
+ *********************************************************************/
+
+static void wm831x_config_backup(struct wm831x *wm831x)
+{
+        struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+        struct wm831x_backup_pdata *pdata;
+        int ret, reg;
+
+        if (!wm831x_pdata || !wm831x_pdata->backup) {
+                dev_warn(wm831x->dev,
+                         "No backup battery charger configuration\n");
+                return;
+        }
+
+        pdata = wm831x_pdata->backup;
+
+        reg = 0;
+
+        if (pdata->charger_enable)
+                reg |= WM831X_BKUP_CHG_ENA | WM831X_BKUP_BATT_DET_ENA;
+        if (pdata->no_constant_voltage)
+                reg |= WM831X_BKUP_CHG_MODE;
+
+        switch (pdata->vlim) {
+        case 2500:
+                break;
+        case 3100:
+                reg |= WM831X_BKUP_CHG_VLIM;
+                break;
+        default:
+                dev_err(wm831x->dev, "Invalid backup voltage limit %dmV\n",
+                        pdata->vlim);
+        }
+
+        switch (pdata->ilim) {
+        case 100:
+                break;
+        case 200:
+                reg |= 1;
+                break;
+        case 300:
+                reg |= 2;
+                break;
+        case 400:
+                reg |= 3;
+                break;
+        default:
+                dev_err(wm831x->dev, "Invalid backup current limit %duA\n",
+                        pdata->ilim);
+        }
+
+        ret = wm831x_reg_unlock(wm831x);
+        if (ret != 0) {
+                dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
+                return;
+        }
+
+        ret = wm831x_set_bits(wm831x, WM831X_BACKUP_CHARGER_CONTROL,
+                              WM831X_BKUP_CHG_ENA_MASK |
+                              WM831X_BKUP_CHG_MODE_MASK |
+                              WM831X_BKUP_BATT_DET_ENA_MASK |
+                              WM831X_BKUP_CHG_VLIM_MASK |
+                              WM831X_BKUP_CHG_ILIM_MASK,
+                              reg);
+        if (ret != 0)
+                dev_err(wm831x->dev,
+                        "Failed to set backup charger config: %d\n", ret);
+
+        wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_backup_get_prop(struct power_supply *psy,
+                                  enum power_supply_property psp,
+                                  union power_supply_propval *val)
+{
+        struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+        struct wm831x *wm831x = wm831x_power->wm831x;
+        int ret = 0;
+
+        ret = wm831x_reg_read(wm831x, WM831X_BACKUP_CHARGER_CONTROL);
+        if (ret < 0)
+                return ret;
+
+        switch (psp) {
+        case POWER_SUPPLY_PROP_STATUS:
+                if (ret & WM831X_BKUP_CHG_STS)
+                        val->intval = POWER_SUPPLY_STATUS_CHARGING;
+                else
+                        val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+                break;
+
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BKUP_BATT,
+                                                val);
+                break;
+
+        case POWER_SUPPLY_PROP_PRESENT:
+                if (ret & WM831X_BKUP_CHG_STS)
+                        val->intval = 1;
+                else
+                        val->intval = 0;
+                break;
+
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
+}
+
+static enum power_supply_property wm831x_backup_props[] = {
+        POWER_SUPPLY_PROP_STATUS,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+        POWER_SUPPLY_PROP_PRESENT,
+};
+
+/*********************************************************************
+ *              Initialisation
+ *********************************************************************/
+
+static irqreturn_t wm831x_syslo_irq(int irq, void *data)
+{
+        struct wm831x_power *wm831x_power = data;
+        struct wm831x *wm831x = wm831x_power->wm831x;
+
+        /* Not much we can actually *do* but tell people for
+         * posterity, we're probably about to run out of power. */
+        dev_crit(wm831x->dev, "SYSVDD under voltage\n");
+
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
+{
+        struct wm831x_power *wm831x_power = data;
+        struct wm831x *wm831x = wm831x_power->wm831x;
+
+        dev_dbg(wm831x->dev, "Power source changed\n");
+
+        /* Just notify for everything - little harm in overnotifying.
+         * The backup battery is not a power source while the system
+         * is running so skip that.
+         */
+        power_supply_changed(&wm831x_power->battery);
+        power_supply_changed(&wm831x_power->usb);
+        power_supply_changed(&wm831x_power->wall);
+
+        return IRQ_HANDLED;
+}
+
+static __devinit int wm831x_power_probe(struct platform_device *pdev)
+{
+        struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+        struct wm831x_power *power;
+        struct power_supply *usb;
+        struct power_supply *battery;
+        struct power_supply *wall;
+        struct power_supply *backup;
+        int ret, irq, i;
+
+        power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
+        if (power == NULL)
+                return -ENOMEM;
+
+        power->wm831x = wm831x;
+        platform_set_drvdata(pdev, power);
+
+        usb = &power->usb;
+        battery = &power->battery;
+        wall = &power->wall;
+        backup = &power->backup;
+
+        /* We ignore configuration failures since we can still read back
+         * the status without enabling either of the chargers.
+         */
+        wm831x_config_battery(wm831x);
+        wm831x_config_backup(wm831x);
+
+        wall->name = "wm831x-wall";
+        wall->type = POWER_SUPPLY_TYPE_MAINS;
+        wall->properties = wm831x_wall_props;
+        wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
+        wall->get_property = wm831x_wall_get_prop;
+        ret = power_supply_register(&pdev->dev, wall);
+        if (ret)
+                goto err_kmalloc;
+
+        battery->name = "wm831x-battery";
+        battery->properties = wm831x_bat_props;
+        battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
+        battery->get_property = wm831x_bat_get_prop;
+        battery->use_for_apm = 1;
+        ret = power_supply_register(&pdev->dev, battery);
+        if (ret)
+                goto err_wall;
+
+        usb->name = "wm831x-usb",
+        usb->type = POWER_SUPPLY_TYPE_USB;
+        usb->properties = wm831x_usb_props;
+        usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
+        usb->get_property = wm831x_usb_get_prop;
+        ret = power_supply_register(&pdev->dev, usb);
+        if (ret)
+                goto err_battery;
+
+        backup->name = "wm831x-backup";
+        backup->type = POWER_SUPPLY_TYPE_BATTERY;
+        backup->properties = wm831x_backup_props;
+        backup->num_properties = ARRAY_SIZE(wm831x_backup_props);
+        backup->get_property = wm831x_backup_get_prop;
+        ret = power_supply_register(&pdev->dev, backup);
+        if (ret)
+                goto err_usb;
+
+        irq = platform_get_irq_byname(pdev, "SYSLO");
+        ret = wm831x_request_irq(wm831x, irq, wm831x_syslo_irq,
+                                 IRQF_TRIGGER_RISING, "SYSLO",
+                                 power);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
+                        irq, ret);
+                goto err_backup;
+        }
+
+        irq = platform_get_irq_byname(pdev, "PWR SRC");
+        ret = wm831x_request_irq(wm831x, irq, wm831x_pwr_src_irq,
+                                 IRQF_TRIGGER_RISING, "Power source",
+                                 power);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
+                        irq, ret);
+                goto err_syslo;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+                irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+                ret = wm831x_request_irq(wm831x, irq, wm831x_bat_irq,
+                                         IRQF_TRIGGER_RISING,
+                                         wm831x_bat_irqs[i],
+                                         power);
+                if (ret != 0) {
+                        dev_err(&pdev->dev,
+                                "Failed to request %s IRQ %d: %d\n",
+                                wm831x_bat_irqs[i], irq, ret);
+                        goto err_bat_irq;
+                }
+        }
+
+        return ret;
+
+err_bat_irq:
+        for (; i >= 0; i--) {
+                irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+                wm831x_free_irq(wm831x, irq, power);
+        }
+        irq = platform_get_irq_byname(pdev, "PWR SRC");
+        wm831x_free_irq(wm831x, irq, power);
+err_syslo:
+        irq = platform_get_irq_byname(pdev, "SYSLO");
+        wm831x_free_irq(wm831x, irq, power);
+err_backup:
+        power_supply_unregister(backup);
+err_usb:
+        power_supply_unregister(usb);
+err_battery:
+        power_supply_unregister(battery);
+err_wall:
+        power_supply_unregister(wall);
+err_kmalloc:
+        kfree(power);
+        return ret;
+}
+
+static __devexit int wm831x_power_remove(struct platform_device *pdev)
+{
+        struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
+        struct wm831x *wm831x = wm831x_power->wm831x;
+        int irq, i;
+
+        for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+                irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+                wm831x_free_irq(wm831x, irq, wm831x_power);
+        }
+
+        irq = platform_get_irq_byname(pdev, "PWR SRC");
+        wm831x_free_irq(wm831x, irq, wm831x_power);
+
+        irq = platform_get_irq_byname(pdev, "SYSLO");
+        wm831x_free_irq(wm831x, irq, wm831x_power);
+
+        power_supply_unregister(&wm831x_power->backup);
+        power_supply_unregister(&wm831x_power->battery);
+        power_supply_unregister(&wm831x_power->wall);
+        power_supply_unregister(&wm831x_power->usb);
+        return 0;
+}
+
+static struct platform_driver wm831x_power_driver = {
+        .probe = wm831x_power_probe,
+        .remove = __devexit_p(wm831x_power_remove),
+        .driver = {
+                .name = "wm831x-power",
+        },
+};
+
+static int __init wm831x_power_init(void)
+{
+        return platform_driver_register(&wm831x_power_driver);
+}
+module_init(wm831x_power_init);
+
+static void __exit wm831x_power_exit(void)
+{
+        platform_driver_unregister(&wm831x_power_driver);
+}
+module_exit(wm831x_power_exit);
+
+MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-power");
diff --git a/drivers/power/wm8350_power.c b/drivers/power/wm8350_power.c
index 1b16bf343f2f..28b0299c0043 100644
--- a/drivers/power/wm8350_power.c
+++ b/drivers/power/wm8350_power.c
@@ -321,6 +321,24 @@ static int wm8350_bat_check_health(struct wm8350 *wm8350)
         return POWER_SUPPLY_HEALTH_GOOD;
 }
 
+static int wm8350_bat_get_charge_type(struct wm8350 *wm8350)
+{
+        int state;
+
+        state = wm8350_reg_read(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2) &
+            WM8350_CHG_STS_MASK;
+        switch (state) {
+        case WM8350_CHG_STS_OFF:
+                return POWER_SUPPLY_CHARGE_TYPE_NONE;
+        case WM8350_CHG_STS_TRICKLE:
+                return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+        case WM8350_CHG_STS_FAST:
+                return POWER_SUPPLY_CHARGE_TYPE_FAST;
+        default:
+                return POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+        }
+}
+
 static int wm8350_bat_get_property(struct power_supply *psy,
                                    enum power_supply_property psp,
                                    union power_supply_propval *val)
@@ -342,6 +360,9 @@ static int wm8350_bat_get_property(struct power_supply *psy,
         case POWER_SUPPLY_PROP_HEALTH:
                 val->intval = wm8350_bat_check_health(wm8350);
                 break;
+        case POWER_SUPPLY_PROP_CHARGE_TYPE:
+                val->intval = wm8350_bat_get_charge_type(wm8350);
+                break;
         default:
                 ret = -EINVAL;
                 break;
@@ -355,6 +376,7 @@ static enum power_supply_property wm8350_bat_props[] = {
         POWER_SUPPLY_PROP_ONLINE,
         POWER_SUPPLY_PROP_VOLTAGE_NOW,
         POWER_SUPPLY_PROP_HEALTH,
+        POWER_SUPPLY_PROP_CHARGE_TYPE,
 };
 
 /*********************************************************************
diff --git a/drivers/power/wm97xx_battery.c b/drivers/power/wm97xx_battery.c
index b787335a8419..f2bfd296dbae 100644
--- a/drivers/power/wm97xx_battery.c
+++ b/drivers/power/wm97xx_battery.c
@@ -22,17 +22,20 @@
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/gpio.h>
-#include <linux/wm97xx_batt.h>
+#include <linux/irq.h>
 
 static DEFINE_MUTEX(bat_lock);
 static struct work_struct bat_work;
 struct mutex work_lock;
 static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
-static struct wm97xx_batt_info *pdata;
+static struct wm97xx_batt_info *gpdata;
 static enum power_supply_property *prop;
 
 static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
 {
+        struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+        struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
         return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev->parent),
                                         pdata->batt_aux) * pdata->batt_mult /
                                         pdata->batt_div;
@@ -40,6 +43,9 @@ static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
 
 static unsigned long wm97xx_read_temp(struct power_supply *bat_ps)
 {
+        struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+        struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
         return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev->parent),
                                         pdata->temp_aux) * pdata->temp_mult /
                                         pdata->temp_div;
@@ -49,6 +55,9 @@ static int wm97xx_bat_get_property(struct power_supply *bat_ps,
                             enum power_supply_property psp,
                             union power_supply_propval *val)
 {
+        struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+        struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
         switch (psp) {
         case POWER_SUPPLY_PROP_STATUS:
                 val->intval = bat_status;
@@ -97,6 +106,8 @@ static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps)
 static void wm97xx_bat_update(struct power_supply *bat_ps)
 {
         int old_status = bat_status;
+        struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+        struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
 
         mutex_lock(&work_lock);
 
@@ -127,21 +138,29 @@ static void wm97xx_bat_work(struct work_struct *work)
         wm97xx_bat_update(&bat_ps);
 }
 
+static irqreturn_t wm97xx_chrg_irq(int irq, void *data)
+{
+        schedule_work(&bat_work);
+        return IRQ_HANDLED;
+}
+
 #ifdef CONFIG_PM
-static int wm97xx_bat_suspend(struct platform_device *dev, pm_message_t state)
+static int wm97xx_bat_suspend(struct device *dev)
 {
         flush_scheduled_work();
         return 0;
 }
 
-static int wm97xx_bat_resume(struct platform_device *dev)
+static int wm97xx_bat_resume(struct device *dev)
 {
         schedule_work(&bat_work);
         return 0;
 }
-#else
-#define wm97xx_bat_suspend NULL
-#define wm97xx_bat_resume NULL
+
+static struct dev_pm_ops wm97xx_bat_pm_ops = {
+        .suspend        = wm97xx_bat_suspend,
+        .resume         = wm97xx_bat_resume,
+};
 #endif
 
 static int __devinit wm97xx_bat_probe(struct platform_device *dev)
@@ -149,6 +168,15 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
         int ret = 0;
         int props = 1;  /* POWER_SUPPLY_PROP_PRESENT */
         int i = 0;
+        struct wm97xx_pdata *wmdata = dev->dev.platform_data;
+        struct wm97xx_batt_pdata *pdata;
+
+        if (gpdata) {
+                dev_err(&dev->dev, "Do not pass platform_data through "
+                        "wm97xx_bat_set_pdata!\n");
+                return -EINVAL;
+        } else
+                pdata = wmdata->batt_pdata;
 
         if (dev->id != -1)
                 return -EINVAL;
@@ -156,17 +184,22 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
         mutex_init(&work_lock);
 
         if (!pdata) {
-                dev_err(&dev->dev, "Please use wm97xx_bat_set_pdata\n");
+                dev_err(&dev->dev, "No platform_data supplied\n");
                 return -EINVAL;
         }
 
-        if (pdata->charge_gpio >= 0 && gpio_is_valid(pdata->charge_gpio)) {
+        if (gpio_is_valid(pdata->charge_gpio)) {
                 ret = gpio_request(pdata->charge_gpio, "BATT CHRG");
                 if (ret)
                         goto err;
                 ret = gpio_direction_input(pdata->charge_gpio);
                 if (ret)
                         goto err2;
+                ret = request_irq(gpio_to_irq(pdata->charge_gpio),
+                                wm97xx_chrg_irq, IRQF_DISABLED,
+                                "AC Detect", 0);
+                if (ret)
+                        goto err2;
                 props++;        /* POWER_SUPPLY_PROP_STATUS */
         }
 
@@ -183,7 +216,7 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
 
         prop = kzalloc(props * sizeof(*prop), GFP_KERNEL);
         if (!prop)
-                goto err2;
+                goto err3;
 
         prop[i++] = POWER_SUPPLY_PROP_PRESENT;
         if (pdata->charge_gpio >= 0)
@@ -216,21 +249,30 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
         if (!ret)
                 schedule_work(&bat_work);
         else
-                goto err3;
+                goto err4;
 
         return 0;
-err3:
+err4:
         kfree(prop);
+err3:
+        if (gpio_is_valid(pdata->charge_gpio))
+                free_irq(gpio_to_irq(pdata->charge_gpio), dev);
 err2:
-        gpio_free(pdata->charge_gpio);
+        if (gpio_is_valid(pdata->charge_gpio))
+                gpio_free(pdata->charge_gpio);
 err:
         return ret;
 }
 
 static int __devexit wm97xx_bat_remove(struct platform_device *dev)
 {
-        if (pdata && pdata->charge_gpio && pdata->charge_gpio >= 0)
+        struct wm97xx_pdata *wmdata = dev->dev.platform_data;
+        struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
+        if (pdata && gpio_is_valid(pdata->charge_gpio)) {
+                free_irq(gpio_to_irq(pdata->charge_gpio), dev);
                 gpio_free(pdata->charge_gpio);
+        }
         flush_scheduled_work();
         power_supply_unregister(&bat_ps);
         kfree(prop);
@@ -241,11 +283,12 @@ static struct platform_driver wm97xx_bat_driver = {
         .driver = {
                 .name   = "wm97xx-battery",
                 .owner  = THIS_MODULE,
+#ifdef CONFIG_PM
+                .pm     = &wm97xx_bat_pm_ops,
+#endif
         },
         .probe          = wm97xx_bat_probe,
         .remove         = __devexit_p(wm97xx_bat_remove),
-        .suspend        = wm97xx_bat_suspend,
-        .resume         = wm97xx_bat_resume,
 };
 
 static int __init wm97xx_bat_init(void)
@@ -258,9 +301,9 @@ static void __exit wm97xx_bat_exit(void)
         platform_driver_unregister(&wm97xx_bat_driver);
 }
 
-void __init wm97xx_bat_set_pdata(struct wm97xx_batt_info *data)
+void wm97xx_bat_set_pdata(struct wm97xx_batt_info *data)
 {
-        pdata = data;
+        gpdata = data;
 }
 EXPORT_SYMBOL_GPL(wm97xx_bat_set_pdata);