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path: root/drivers/power/ds2782_battery.c
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Diffstat (limited to 'drivers/power/ds2782_battery.c')
-rw-r--r--drivers/power/ds2782_battery.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/power/ds2782_battery.c b/drivers/power/ds2782_battery.c
index 2fa9b6bf1f3..e7301b3ed62 100644
--- a/drivers/power/ds2782_battery.c
+++ b/drivers/power/ds2782_battery.c
@@ -7,6 +7,8 @@
*
* DS2786 added by Yulia Vilensky <vilensky@compulab.co.il>
*
+ * UEvent sending added by Evgeny Romanov <romanov@neurosoft.ru>
+ *
* 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.
@@ -19,6 +21,7 @@
#include <linux/errno.h>
#include <linux/swab.h>
#include <linux/i2c.h>
+#include <linux/delay.h>
#include <linux/idr.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
@@ -40,6 +43,8 @@
#define DS2786_CURRENT_UNITS 25
+#define DS278x_DELAY 1000
+
struct ds278x_info;
struct ds278x_battery_ops {
@@ -54,8 +59,11 @@ struct ds278x_info {
struct i2c_client *client;
struct power_supply battery;
struct ds278x_battery_ops *ops;
+ struct delayed_work bat_work;
int id;
int rsns;
+ int capacity;
+ int status; /* State Of Charge */
};
static DEFINE_IDR(battery_id);
@@ -220,6 +228,8 @@ static int ds278x_get_status(struct ds278x_info *info, int *status)
if (err)
return err;
+ info->capacity = capacity;
+
if (capacity == 100)
*status = POWER_SUPPLY_STATUS_FULL;
else if (current_uA == 0)
@@ -267,6 +277,27 @@ static int ds278x_battery_get_property(struct power_supply *psy,
return ret;
}
+static void ds278x_bat_update(struct ds278x_info *info)
+{
+ int old_status = info->status;
+ int old_capacity = info->capacity;
+
+ ds278x_get_status(info, &info->status);
+
+ if ((old_status != info->status) || (old_capacity != info->capacity))
+ power_supply_changed(&info->battery);
+}
+
+static void ds278x_bat_work(struct work_struct *work)
+{
+ struct ds278x_info *info;
+
+ info = container_of(work, struct ds278x_info, bat_work.work);
+ ds278x_bat_update(info);
+
+ schedule_delayed_work(&info->bat_work, DS278x_DELAY);
+}
+
static enum power_supply_property ds278x_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CAPACITY,
@@ -295,10 +326,39 @@ static int ds278x_battery_remove(struct i2c_client *client)
idr_remove(&battery_id, info->id);
mutex_unlock(&battery_lock);
+ cancel_delayed_work(&info->bat_work);
+
kfree(info);
return 0;
}
+#ifdef CONFIG_PM
+
+static int ds278x_suspend(struct i2c_client *client,
+ pm_message_t state)
+{
+ struct ds278x_info *info = i2c_get_clientdata(client);
+
+ cancel_delayed_work(&info->bat_work);
+ return 0;
+}
+
+static int ds278x_resume(struct i2c_client *client)
+{
+ struct ds278x_info *info = i2c_get_clientdata(client);
+
+ schedule_delayed_work(&info->bat_work, DS278x_DELAY);
+ return 0;
+}
+
+#else
+
+#define ds278x_suspend NULL
+#define ds278x_resume NULL
+
+#endif /* CONFIG_PM */
+
+
enum ds278x_num_id {
DS2782 = 0,
DS2786,
@@ -368,10 +428,17 @@ static int ds278x_battery_probe(struct i2c_client *client,
info->ops = &ds278x_ops[id->driver_data];
ds278x_power_supply_init(&info->battery);
+ info->capacity = 100;
+ info->status = POWER_SUPPLY_STATUS_FULL;
+
+ INIT_DELAYED_WORK(&info->bat_work, ds278x_bat_work);
+
ret = power_supply_register(&client->dev, &info->battery);
if (ret) {
dev_err(&client->dev, "failed to register battery\n");
goto fail_register;
+ } else {
+ schedule_delayed_work(&info->bat_work, DS278x_DELAY);
}
return 0;
@@ -401,6 +468,8 @@ static struct i2c_driver ds278x_battery_driver = {
},
.probe = ds278x_battery_probe,
.remove = ds278x_battery_remove,
+ .suspend = ds278x_suspend,
+ .resume = ds278x_resume,
.id_table = ds278x_id,
};
module_i2c_driver(ds278x_battery_driver);