8 files changed, 215 insertions, 8 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index e3a9c37d08f6..9ce55850271a 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -56,4 +56,10 @@ config BATTERY_TOSA
           Say Y to enable support for the battery on the Sharp Zaurus
           SL-6000 (tosa) models.
 
+config BATTERY_PALMTX
+        tristate "Palm T|X battery"
+        depends on MACH_PALMTX
+        help
+          Say Y to enable support for the battery in Palm T|X.
+
 endif # POWER_SUPPLY
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 1e408fa268cf..4706bf8ff459 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -21,3 +21,4 @@ obj-$(CONFIG_BATTERY_DS2760)	+= ds2760_battery.o
 obj-$(CONFIG_BATTERY_PMU)       += pmu_battery.o
 obj-$(CONFIG_BATTERY_OLPC)      += olpc_battery.o
 obj-$(CONFIG_BATTERY_TOSA)      += tosa_battery.o
+obj-$(CONFIG_BATTERY_PALMTX)    += palmtx_battery.o
diff --git a/drivers/power/apm_power.c b/drivers/power/apm_power.c
index a4892275659d..936bae560fa1 100644
--- a/drivers/power/apm_power.c
+++ b/drivers/power/apm_power.c
@@ -78,7 +78,7 @@ static void find_main_battery(void)
         main_battery = NULL;
         bp.main = main_battery;
 
-        error = class_for_each_device(power_supply_class, &bp,
+        error = class_for_each_device(power_supply_class, NULL, &bp,
                                       __find_main_battery);
         if (error) {
                 main_battery = bp.main;
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index 71be36f18709..308ddb201b66 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -433,6 +433,8 @@ static int ds2760_battery_resume(struct platform_device *pdev)
 
 #endif /* CONFIG_PM */
 
+MODULE_ALIAS("platform:ds2760-battery");
+
 static struct platform_driver ds2760_battery_driver = {
         .driver = {
                 .name = "ds2760-battery",
diff --git a/drivers/power/palmtx_battery.c b/drivers/power/palmtx_battery.c
new file mode 100644
index 000000000000..244bb273a637
--- /dev/null
+++ b/drivers/power/palmtx_battery.c
@@ -0,0 +1,198 @@
+/*
+ * linux/drivers/power/palmtx_battery.c
+ *
+ * Battery measurement code for Palm T|X Handheld computer
+ *
+ * based on tosa_battery.c
+ *
+ * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.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/kernel.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/wm97xx.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-types.h>
+#include <asm/arch/palmtx.h>
+
+static DEFINE_MUTEX(bat_lock);
+static struct work_struct bat_work;
+struct mutex work_lock;
+int bat_status = POWER_SUPPLY_STATUS_DISCHARGING;
+
+static unsigned long palmtx_read_bat(struct power_supply *bat_ps)
+{
+        return wm97xx_read_aux_adc(bat_ps->dev->parent->driver_data,
+                                    WM97XX_AUX_ID3) * 1000 / 414;
+}
+
+static unsigned long palmtx_read_temp(struct power_supply *bat_ps)
+{
+        return wm97xx_read_aux_adc(bat_ps->dev->parent->driver_data,
+                                    WM97XX_AUX_ID2);
+}
+
+static int palmtx_bat_get_property(struct power_supply *bat_ps,
+                            enum power_supply_property psp,
+                            union power_supply_propval *val)
+{
+        switch (psp) {
+        case POWER_SUPPLY_PROP_STATUS:
+                val->intval = bat_status;
+                break;
+        case POWER_SUPPLY_PROP_TECHNOLOGY:
+                val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO;
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                val->intval = palmtx_read_bat(bat_ps);
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+        case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+                val->intval = PALMTX_BAT_MAX_VOLTAGE;
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+                val->intval = PALMTX_BAT_MIN_VOLTAGE;
+                break;
+        case POWER_SUPPLY_PROP_TEMP:
+                val->intval = palmtx_read_temp(bat_ps);
+                break;
+        case POWER_SUPPLY_PROP_PRESENT:
+                val->intval = 1;
+                break;
+        default:
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static void palmtx_bat_external_power_changed(struct power_supply *bat_ps)
+{
+        schedule_work(&bat_work);
+}
+
+static char *status_text[] = {
+        [POWER_SUPPLY_STATUS_UNKNOWN] =         "Unknown",
+        [POWER_SUPPLY_STATUS_CHARGING] =        "Charging",
+        [POWER_SUPPLY_STATUS_DISCHARGING] =     "Discharging",
+};
+
+static void palmtx_bat_update(struct power_supply *bat_ps)
+{
+        int old_status = bat_status;
+
+        mutex_lock(&work_lock);
+
+        bat_status = gpio_get_value(GPIO_NR_PALMTX_POWER_DETECT) ?
+                                    POWER_SUPPLY_STATUS_CHARGING :
+                                    POWER_SUPPLY_STATUS_DISCHARGING;
+
+        if (old_status != bat_status) {
+                pr_debug("%s %s -> %s\n", bat_ps->name,
+                                status_text[old_status],
+                                status_text[bat_status]);
+                power_supply_changed(bat_ps);
+        }
+
+        mutex_unlock(&work_lock);
+}
+
+static enum power_supply_property palmtx_bat_main_props[] = {
+        POWER_SUPPLY_PROP_STATUS,
+        POWER_SUPPLY_PROP_TECHNOLOGY,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+        POWER_SUPPLY_PROP_VOLTAGE_MAX,
+        POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+        POWER_SUPPLY_PROP_TEMP,
+        POWER_SUPPLY_PROP_PRESENT,
+};
+
+struct power_supply bat_ps = {
+        .name                   = "main-battery",
+        .type                   = POWER_SUPPLY_TYPE_BATTERY,
+        .properties             = palmtx_bat_main_props,
+        .num_properties         = ARRAY_SIZE(palmtx_bat_main_props),
+        .get_property           = palmtx_bat_get_property,
+        .external_power_changed = palmtx_bat_external_power_changed,
+        .use_for_apm            = 1,
+};
+
+static void palmtx_bat_work(struct work_struct *work)
+{
+        palmtx_bat_update(&bat_ps);
+}
+
+#ifdef CONFIG_PM
+static int palmtx_bat_suspend(struct platform_device *dev, pm_message_t state)
+{
+        flush_scheduled_work();
+        return 0;
+}
+
+static int palmtx_bat_resume(struct platform_device *dev)
+{
+        schedule_work(&bat_work);
+        return 0;
+}
+#else
+#define palmtx_bat_suspend NULL
+#define palmtx_bat_resume NULL
+#endif
+
+static int __devinit palmtx_bat_probe(struct platform_device *dev)
+{
+        int ret = 0;
+
+        if (!machine_is_palmtx())
+                return -ENODEV;
+
+        mutex_init(&work_lock);
+
+        INIT_WORK(&bat_work, palmtx_bat_work);
+
+        ret = power_supply_register(&dev->dev, &bat_ps);
+        if (!ret)
+                schedule_work(&bat_work);
+
+        return ret;
+}
+
+static int __devexit palmtx_bat_remove(struct platform_device *dev)
+{
+        power_supply_unregister(&bat_ps);
+        return 0;
+}
+
+static struct platform_driver palmtx_bat_driver = {
+        .driver.name    = "wm97xx-battery",
+        .driver.owner   = THIS_MODULE,
+        .probe          = palmtx_bat_probe,
+        .remove         = __devexit_p(palmtx_bat_remove),
+        .suspend        = palmtx_bat_suspend,
+        .resume         = palmtx_bat_resume,
+};
+
+static int __init palmtx_bat_init(void)
+{
+        return platform_driver_register(&palmtx_bat_driver);
+}
+
+static void __exit palmtx_bat_exit(void)
+{
+        platform_driver_unregister(&palmtx_bat_driver);
+}
+
+module_init(palmtx_bat_init);
+module_exit(palmtx_bat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
+MODULE_DESCRIPTION("Palm T|X battery driver");
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index 82810b7bff9c..0471ec743ab9 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -362,6 +362,8 @@ static int pda_power_resume(struct platform_device *pdev)
 #define pda_power_resume NULL
 #endif /* CONFIG_PM */
 
+MODULE_ALIAS("platform:pda-power");
+
 static struct platform_driver pda_power_pdrv = {
         .driver = {
                 .name = "pda-power",
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 138dd76ee347..cb1ccb472921 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -41,7 +41,7 @@ static void power_supply_changed_work(struct work_struct *work)
 
         dev_dbg(psy->dev, "%s\n", __func__);
 
-        class_for_each_device(power_supply_class, psy,
+        class_for_each_device(power_supply_class, NULL, psy,
                               __power_supply_changed_work);
 
         power_supply_update_leds(psy);
@@ -79,7 +79,7 @@ int power_supply_am_i_supplied(struct power_supply *psy)
 {
         int error;
 
-        error = class_for_each_device(power_supply_class, psy,
+        error = class_for_each_device(power_supply_class, NULL, psy,
                                       __power_supply_am_i_supplied);
 
         dev_dbg(psy->dev, "%s %d\n", __func__, error);
@@ -91,15 +91,13 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
 {
         int rc = 0;
 
-        psy->dev = device_create(power_supply_class, parent, 0,
-                                 "%s", psy->name);
+        psy->dev = device_create_drvdata(power_supply_class, parent, 0,
+                                         psy, "%s", psy->name);
         if (IS_ERR(psy->dev)) {
                 rc = PTR_ERR(psy->dev);
                 goto dev_create_failed;
         }
 
-        dev_set_drvdata(psy->dev, psy);
-
         INIT_WORK(&psy->changed_work, power_supply_changed_work);
 
         rc = power_supply_create_attrs(psy);
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 82e1246eeb0a..fe2aeb11939b 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -202,7 +202,7 @@ int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
 
         dev_dbg(dev, "uevent\n");
 
-        if (!psy) {
+        if (!psy || !psy->dev) {
                 dev_dbg(dev, "No power supply yet\n");
                 return ret;
         }