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power: android: battery monitor polling with wakeup alarms

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Based on Tuna code from 3.0 ported to 3.4 alarm API.

Change-Id: I9b13209963d5a5043237e9e29f3cb07c40583af2
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2012-08-01 18:22:22 -07:00
committed by Arve Hjønnevåg
parent 23aedd872e
commit 777d1c1c59
1 changed files with 40 additions and 17 deletions
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57
drivers/power/android_battery.c
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@@ -31,10 +31,14 @@
#include <linux/slab.h>
#include <linux/wakelock.h>
#include <linux/workqueue.h>
#include <linux/alarmtimer.h>
#include <linux/timer.h>
#include <linux/debugfs.h>
#include <linux/platform_data/android_battery.h>
#define FAST_POLL (1 * 60)
#define SLOW_POLL (10 * 60)
struct android_bat_data {
struct android_bat_platform_data *pdata;
struct android_bat_callbacks callbacks;
@@ -56,11 +60,11 @@ struct android_bat_data {
unsigned int charging_status;
struct workqueue_struct *monitor_wqueue;
struct delayed_work monitor_work;
struct work_struct monitor_work;
struct work_struct charger_work;
bool slow_poll;
ktime_t last_poll;
struct alarm monitor_alarm;
ktime_t last_poll;
struct dentry *debugfs_entry;
};
@@ -270,11 +274,18 @@ static void android_bat_charger_work(struct work_struct *work)
wake_lock_timeout(&battery->charger_wake_lock, HZ * 2);
}
static void android_bat_monitor_set_alarm(struct android_bat_data *battery,
int seconds)
{
alarm_start(&battery->monitor_alarm,
ktime_add(battery->last_poll, ktime_set(seconds, 0)));
}
static void android_bat_monitor_work(struct work_struct *work)
{
struct android_bat_data *battery;
battery = container_of(work, struct android_bat_data,
monitor_work.work);
battery = container_of(work, struct android_bat_data, monitor_work);
wake_lock(&battery->monitor_wake_lock);
android_bat_update_data(battery);
@@ -314,10 +325,9 @@ static void android_bat_monitor_work(struct work_struct *work)
}
break;
default:
wake_unlock(&battery->monitor_wake_lock);
pr_err("%s: Undefined battery status: %d\n", __func__,
battery->charging_status);
return;
break;
}
pr_info("battery: l=%d v=%d c=%d temp=%d h=%d st=%d type=%s\n",
@@ -326,13 +336,23 @@ static void android_bat_monitor_work(struct work_struct *work)
battery->charging_status,
charge_source_str(battery->charge_source));
power_supply_changed(&battery->psy_bat);
queue_delayed_work(battery->monitor_wqueue,
&battery->monitor_work, msecs_to_jiffies(50000));
battery->last_poll = ktime_get_boottime();
android_bat_monitor_set_alarm(battery, FAST_POLL);
wake_unlock(&battery->monitor_wake_lock);
return;
}
static enum alarmtimer_restart android_bat_monitor_alarm(
struct alarm *alarm, ktime_t now)
{
struct android_bat_data *battery =
container_of(alarm, struct android_bat_data, monitor_alarm);
wake_lock(&battery->monitor_wake_lock);
queue_work(battery->monitor_wqueue, &battery->monitor_work);
return ALARMTIMER_NORESTART;
}
static int android_power_debug_dump(struct seq_file *s, void *unused)
{
struct android_bat_data *battery = s->private;
@@ -410,8 +430,7 @@ static int android_bat_probe(struct platform_device *pdev)
goto err_wq;
}
INIT_DELAYED_WORK_DEFERRABLE(&battery->monitor_work,
android_bat_monitor_work);
INIT_WORK(&battery->monitor_work, android_bat_monitor_work);
INIT_WORK(&battery->charger_work, android_bat_charger_work);
battery->callbacks.charge_source_changed =
@@ -426,8 +445,11 @@ static int android_bat_probe(struct platform_device *pdev)
wake_lock(&battery->charger_wake_lock);
queue_work(battery->monitor_wqueue, &battery->charger_work);
queue_delayed_work(battery->monitor_wqueue,
&battery->monitor_work, msecs_to_jiffies(0));
wake_lock(&battery->monitor_wake_lock);
battery->last_poll = ktime_get_boottime();
alarm_init(&battery->monitor_alarm, ALARM_BOOTTIME,
android_bat_monitor_alarm);
queue_work(battery->monitor_wqueue, &battery->monitor_work);
battery->debugfs_entry =
debugfs_create_file("android-power", S_IRUGO, NULL,
@@ -452,6 +474,7 @@ static int android_bat_remove(struct platform_device *pdev)
{
struct android_bat_data *battery = platform_get_drvdata(pdev);
alarm_cancel(&battery->monitor_alarm);
flush_workqueue(battery->monitor_wqueue);
destroy_workqueue(battery->monitor_wqueue);
power_supply_unregister(&battery->psy_bat);
@@ -466,7 +489,8 @@ static int android_bat_suspend(struct device *dev)
{
struct android_bat_data *battery = dev_get_drvdata(dev);
cancel_delayed_work_sync(&battery->monitor_work);
cancel_work_sync(&battery->monitor_work);
android_bat_monitor_set_alarm(battery, SLOW_POLL);
return 0;
}
@@ -474,8 +498,7 @@ static int android_bat_resume(struct device *dev)
{
struct android_bat_data *battery = dev_get_drvdata(dev);
queue_delayed_work(battery->monitor_wqueue,
&battery->monitor_work, msecs_to_jiffies(0));
android_bat_monitor_set_alarm(battery, FAST_POLL);
return 0;
}