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Date: Sun, 5 Jul 2020 21:10:03 -0300
From: Matheus Castello <matheus@...tello.eng.br>
To: sre@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
Matheus Castello <matheus@...tello.eng.br>
Subject: [PATCH v1] 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@...tello.eng.br>
---
drivers/power/supply/max17040_battery.c | 51 ++++++++++++++++++++++---
1 file changed, 46 insertions(+), 5 deletions(-)
diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index 48aa44665e2f..6cb31b9a958d 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c
@@ -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,
--
2.27.0
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