Since fuel gauge does not support thermal monitoring,
some vendors may couple this fuel gauge with thermal/adc
sensor to monitor battery cell exact temperature.
Add this feature by adding optional iio thermal channel.
Signed-off-by: Svyatoslav Ryhel <clamor95@xxxxxxxxx>
---
drivers/power/supply/max17040_battery.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index 6dfce7b1309e..8c743c26dc6e 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c
@@ -18,6 +18,7 @@
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
+#include <linux/iio/consumer.h>
#define MAX17040_VCELL 0x02
#define MAX17040_SOC 0x04
@@ -143,6 +144,7 @@ struct max17040_chip {
struct power_supply *battery;
struct power_supply_battery_info *batt_info;
struct chip_data data;
+ struct iio_channel *channel_temp;
/* battery capacity */
int soc;
@@ -416,6 +418,11 @@ static int max17040_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = chip->batt_info->charge_full_design_uah;
break;
+ case POWER_SUPPLY_PROP_TEMP:
+ iio_read_channel_raw(chip->channel_temp,
+ &val->intval);
+ val->intval *= 10;
+ break;
case POWER_SUPPLY_PROP_TEMP_MIN:
if (chip->batt_info->temp_min == INT_MIN)
return -ENODATA;
@@ -452,6 +459,7 @@ static enum power_supply_property max17040_battery_props[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TEMP_MIN,
POWER_SUPPLY_PROP_TEMP_MAX,
};
@@ -560,9 +568,24 @@ static int max17040_probe(struct i2c_client *client)
}
}
+ if (of_property_read_bool(client->dev.of_node, "io-channels")) {
+ chip->channel_temp = iio_channel_get(&client->dev, "temp");
+ if (IS_ERR(chip->channel_temp))
+ return dev_err_probe(&client->dev, PTR_ERR(chip->channel_temp),
+ "failed to get temp\n");
+ };
+
return 0;
}
+static void max17040_remove(struct i2c_client *client)
+{
+ struct max17040_chip *chip = i2c_get_clientdata(client);
+
+ if (chip->channel_temp)
+ iio_channel_release(chip->channel_temp);
+}
+
#ifdef CONFIG_PM_SLEEP
static int max17040_suspend(struct device *dev)
@@ -642,6 +665,7 @@ static struct i2c_driver max17040_i2c_driver = {
.pm = MAX17040_PM_OPS,
},
.probe_new = max17040_probe,
+ .remove = max17040_remove,
.id_table = max17040_id,
};
module_i2c_driver(max17040_i2c_driver);
--
2.37.2
