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power: supply: bq24735-charger: optionally poll the ac-detect gpio 

If the ac-detect gpio does not support interrupts, provide a fallback
to poll the gpio at a configurable interval.

Signed-off-by: Peter Rosin <peda@axentia.se>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
hifive-unleashed-5.1
Peter Rosin 2016-12-15 10:28:46 +01:00 committed by Sebastian Reichel
parent 248efcf006
commit bf383fea1f
2 changed files with 46 additions and 5 deletions
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2
Documentation/devicetree/bindings/power/supply/ti,bq24735.txt
View File

@ -27,6 +27,8 @@ Optional properties :
- ti,external-control : Indicates that the charger is configured externally
and that the host should not attempt to enable/disable charging or set the
charge voltage/current.
- poll-interval : In case 'interrupts' is not specified, poll AC presence
on the ti,ac-detect-gpios GPIO with this interval (milliseconds).
Example:

49
drivers/power/supply/bq24735-charger.c
View File

@ -50,6 +50,8 @@ struct bq24735 {
struct bq24735_platform *pdata;
struct mutex lock;
struct gpio_desc *status_gpio;
struct delayed_work poll;
u32 poll_interval;
bool charging;
};
@ -209,11 +211,8 @@ static int bq24735_charger_is_charging(struct bq24735 *charger)
return !(ret & BQ24735_CHG_OPT_CHARGE_DISABLE);
}
static irqreturn_t bq24735_charger_isr(int irq, void *devid)
static void bq24735_update(struct bq24735 *charger)
{
struct power_supply *psy = devid;
struct bq24735 *charger = to_bq24735(psy);
mutex_lock(&charger->lock);
if (charger->charging && bq24735_charger_is_present(charger))
@ -223,11 +222,29 @@ static irqreturn_t bq24735_charger_isr(int irq, void *devid)
mutex_unlock(&charger->lock);
power_supply_changed(psy);
power_supply_changed(charger->charger);
}
static irqreturn_t bq24735_charger_isr(int irq, void *devid)
{
struct power_supply *psy = devid;
struct bq24735 *charger = to_bq24735(psy);
bq24735_update(charger);
return IRQ_HANDLED;
}
static void bq24735_poll(struct work_struct *work)
{
struct bq24735 *charger = container_of(work, struct bq24735, poll.work);
bq24735_update(charger);
schedule_delayed_work(&charger->poll,
msecs_to_jiffies(charger->poll_interval));
}
static int bq24735_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
@ -455,11 +472,32 @@ static int bq24735_charger_probe(struct i2c_client *client,
client->irq, ret);
return ret;
}
} else if (charger->status_gpio) {
ret = device_property_read_u32(&client->dev, "poll-interval",
&charger->poll_interval);
if (ret)
return 0;
if (!charger->poll_interval)
return 0;
INIT_DELAYED_WORK(&charger->poll, bq24735_poll);
schedule_delayed_work(&charger->poll,
msecs_to_jiffies(charger->poll_interval));
}
return 0;
}
static int bq24735_charger_remove(struct i2c_client *client)
{
struct bq24735 *charger = i2c_get_clientdata(client);
if (charger->poll_interval)
cancel_delayed_work_sync(&charger->poll);
return 0;
}
static const struct i2c_device_id bq24735_charger_id[] = {
{ "bq24735-charger", 0 },
{}
@ -478,6 +516,7 @@ static struct i2c_driver bq24735_charger_driver = {
.of_match_table = bq24735_match_ids,
},
.probe = bq24735_charger_probe,
.remove = bq24735_charger_remove,
.id_table = bq24735_charger_id,
};