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charger: smb345: shutdown system when battery capacity is 0%

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To avoid battery is drained to critial low state,
it needs to shutdown device when charging + battery capacity = 0%

Change-Id: If62f1808fdfa527fba065f16268907fedc319601
Signed-off-by: hank_lee <hank_lee@asus.com>
Signed-off-by: alan_lu <alan_lu@asus.com>
This commit is contained in:
alan_lu 2013-04-02 16:43:01 +08:00 committed by Android Partner Code Review
parent d266fbf6d0
commit e9835c3117
1 changed files with 31 additions and 1 deletions
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32
drivers/power/bq27541_battery.c
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@ -75,6 +75,7 @@ extern bool otg_on;
static unsigned int battery_current;
static unsigned int battery_remaining_capacity;
struct workqueue_struct *bq27541_battery_work_queue = NULL;
static unsigned int battery_check_interval = BATTERY_POLLING_RATE;
static char *status_text[] = {"Unknown", "Charging", "Discharging", "Not charging", "Full"};
/* Functions declaration */
@ -256,6 +257,7 @@ static struct bq27541_device_info {
int bat_vol;
int bat_current;
int bat_capacity;
int bat_capacity_zero_count;
unsigned int old_capacity;
unsigned int cap_err;
int old_temperature;
@ -385,7 +387,8 @@ static void battery_status_poll(struct work_struct *work)
}
/* Schedule next polling */
queue_delayed_work(bq27541_battery_work_queue, &batt_dev->status_poll_work, BATTERY_POLLING_RATE*HZ);
queue_delayed_work(bq27541_battery_work_queue,
&batt_dev->status_poll_work, battery_check_interval*HZ);
}
static void low_low_battery_check(struct work_struct *work)
@ -649,6 +652,32 @@ static int bq27541_get_capacity(union power_supply_propval *val)
temp_capacity = ((temp_capacity <0) ? 0 : temp_capacity);
val->intval = temp_capacity;
if ((temp_capacity == 0) &&
(bq27541_battery_cable_status || wireless_on)) {
bq27541_device->bat_capacity_zero_count++;
if (bq27541_device->bat_capacity_zero_count >= 6) {
bq27541_device->bat_capacity_zero_count = 0;
BAT_NOTICE("pretend no charging type to shutdown\n");
bq27541_battery_callback(0);
wireless_on = 0;
bq27541_wireless_callback(0);
} else
BAT_NOTICE("bat_capacity_zero_count = %d",
bq27541_device->bat_capacity_zero_count);
} else
bq27541_device->bat_capacity_zero_count = 0;
if (temp_capacity < 5 && battery_check_interval != 10) {
battery_check_interval = 10;
BAT_NOTICE("battery_check_interval = %d\n",
battery_check_interval);
} else if (temp_capacity >= 5 &&
battery_check_interval != BATTERY_POLLING_RATE) {
battery_check_interval = BATTERY_POLLING_RATE;
BAT_NOTICE("battery_check_interval = %d\n",
battery_check_interval);
}
bq27541_device->old_capacity = val->intval;
bq27541_device->cap_err=0;
@ -725,6 +754,7 @@ static int bq27541_probe(struct i2c_client *client,
bq27541_device->old_capacity = 0xFF;
bq27541_device->old_temperature = 0xFF;
bq27541_device->gpio_low_battery_detect = GPIOPIN_LOW_BATTERY_DETECT;
bq27541_device->bat_capacity_zero_count = 0;
for (i = 0; i < ARRAY_SIZE(bq27541_supply); i++) {
ret = power_supply_register(&client->dev, &bq27541_supply[i]);