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 | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index 3301e8a4b16c..54db20637c87 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
@@ -142,6 +143,7 @@ struct max17040_chip {
struct delayed_work work;
struct power_supply *battery;
struct chip_data data;
+ struct iio_channel *channel_temp;
/* battery capacity */
int soc;
@@ -404,6 +406,13 @@ static int max17040_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_STATUS:
power_supply_get_property_from_supplier(psy, psp, val);
break;
+ case POWER_SUPPLY_PROP_TEMP:
+ if (!chip->channel_temp)
+ return -ENODATA;
+
+ iio_read_channel_processed_scale(chip->channel_temp,
+ &val->intval, 10);
+ break;
default:
return -EINVAL;
}
@@ -424,6 +433,7 @@ static enum power_supply_property max17040_battery_props[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_TEMP,
};
static const struct power_supply_desc max17040_battery_desc = {
@@ -469,6 +479,17 @@ static int max17040_probe(struct i2c_client *client)
i2c_set_clientdata(client, chip);
psy_cfg.drv_data = chip;
+ /* Switch to devm_iio_channel_get_optional when available */
+ chip->channel_temp = devm_iio_channel_get(&client->dev, "temp");
+ if (IS_ERR(chip->channel_temp)) {
+ ret = PTR_ERR(chip->channel_temp);
+ if (ret != -ENODEV)
+ return dev_err_probe(&client->dev, PTR_ERR(chip->channel_temp),
+ "failed to get temp\n");
+ else
+ chip->channel_temp = NULL;
+ }
+
chip->battery = devm_power_supply_register(&client->dev,
&max17040_battery_desc, &psy_cfg);
if (IS_ERR(chip->battery)) {
--
2.39.2
