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power: supply: max17040: Add POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN 

Adds the property POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN to export the
chip->low_soc_alert and add the property as writeable, implementing
max17040_prop_writeable and max17040_set_property, so with that the
user space can readjust the alerts.

Signed-off-by: Matheus Castello <matheus@castello.eng.br>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Matheus Castello 2020-07-05 21:10:03 -03:00 committed by Sebastian Reichel
parent ccf193dee1
commit 2f38dc4d91
1 changed files with 46 additions and 5 deletions
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51
drivers/power/supply/max17040_battery.c
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@ -69,6 +69,9 @@ static int max17040_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = chip->soc;
break;
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
val->intval = chip->low_soc_alert;
break;
default:
return -EINVAL;
}
@ -256,19 +259,57 @@ static int max17040_enable_alert_irq(struct max17040_chip *chip)
return ret;
}
static int max17040_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
return 1;
default:
return 0;
}
}
static int max17040_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct max17040_chip *chip = power_supply_get_drvdata(psy);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
/* alert threshold can be programmed from 1% up to 32% */
if ((val->intval < 1) || (val->intval > 32)) {
ret = -EINVAL;
break;
}
ret = max17040_set_low_soc_alert(chip->client, val->intval);
chip->low_soc_alert = val->intval;
break;
default:
ret = -EINVAL;
}
return ret;
}
static enum power_supply_property max17040_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
};
static const struct power_supply_desc max17040_battery_desc = {
.name = "battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max17040_get_property,
.properties = max17040_battery_props,
.num_properties = ARRAY_SIZE(max17040_battery_props),
.name = "battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max17040_get_property,
.set_property = max17040_set_property,
.property_is_writeable = max17040_prop_writeable,
.properties = max17040_battery_props,
.num_properties = ARRAY_SIZE(max17040_battery_props),
};
static int max17040_probe(struct i2c_client *client,