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/*
* Dumb driver for gta01 battery
*
* Copyright 2009 Openmoko, Inc
* Balaji Rao <balajirrao@openmoko.org>
*/
#include <linux/module.h>
#include <linux/param.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/gta01_battery.h>
struct gta01_battery {
struct power_supply psy;
struct gta01_bat_platform_data *pdata;
};
static enum power_supply_property gta01_bat_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int gta01_bat_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct gta01_battery *bat = container_of(psy, struct gta01_battery, psy);
switch(psp) {
case POWER_SUPPLY_PROP_STATUS:
if (bat->pdata->get_charging_status())
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = bat->pdata->get_voltage();
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = bat->pdata->get_current();
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1; /* You must never run GTA01 without battery. */
break;
default:
return -EINVAL;
}
return 0;
}
static void gta01_bat_ext_changed(struct power_supply *psy)
{
struct gta01_battery *bat = container_of(psy, struct gta01_battery, psy);
power_supply_changed(&bat->psy);
}
static int gta01_battery_probe(struct platform_device *pdev)
{
struct gta01_battery *gta01_bat;
gta01_bat = kzalloc(sizeof(*gta01_bat), GFP_KERNEL);
if (!gta01_bat)
return -ENOMEM;
gta01_bat->psy.name = "battery";
gta01_bat->psy.type = POWER_SUPPLY_TYPE_BATTERY;
gta01_bat->psy.properties = gta01_bat_props;
gta01_bat->psy.num_properties = ARRAY_SIZE(gta01_bat_props);
gta01_bat->psy.get_property = gta01_bat_get_property;
gta01_bat->psy.external_power_changed = gta01_bat_ext_changed;
gta01_bat->pdata = pdev->dev.platform_data;
power_supply_register(&pdev->dev, >a01_bat->psy);
return 0;
}
static int gta01_battery_remove(struct platform_device *pdev)
{
struct gta01_battery *bat = platform_get_drvdata(pdev);
power_supply_unregister(&bat->psy);
kfree(bat);
return 0;
}
static struct platform_driver gta01_battery_driver = {
.driver = {
.name = "gta01_battery",
},
.probe = gta01_battery_probe,
.remove = gta01_battery_remove,
};
static int __init gta01_battery_init(void)
{
return platform_driver_register(>a01_battery_driver);
}
static void __exit gta01_battery_exit(void)
{
platform_driver_unregister(>a01_battery_driver);
}
module_init(gta01_battery_init);
module_exit(gta01_battery_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("gta01 battery driver");
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