diff options
| author | Svyatoslav Ryhel <clamor95@gmail.com> | 2023-07-31 10:36:12 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2023-09-14 16:54:46 +0200 |
| commit | 814755c48f8b2c3e83b3c11535c48ab416128978 (patch) | |
| tree | c358e39ac2a4077e2156de70912b470890fe33a4 /drivers/power | |
| parent | f4b782af61ae7bbf93008d5809b0e3a8ac2bb88e (diff) | |
| download | linux-814755c48f8b2c3e83b3c11535c48ab416128978.tar.gz | |
power: max17040: get thermal data from adc if available
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@gmail.com>
Reviewed-by: Iskren Chernev <me@iskren.info>
Link: https://lore.kernel.org/r/20230731073613.10394-4-clamor95@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/power/supply/max17040_battery.c | 21 |
2 files changed, 22 insertions, 1 deletions
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 663a1c4238066..d99db3a049f2c 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -374,7 +374,7 @@ config AXP288_FUEL_GAUGE config BATTERY_MAX17040 tristate "Maxim MAX17040/17041/17043 family Fuel Gauge" - depends on I2C + depends on I2C && IIO select REGMAP_I2C help Driver supports Maxim fuel-gauge systems for lithium-ion (Li+) diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 92caf6c7a48c0..51310f6e4803b 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -18,6 +18,7 @@ #include <linux/of.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)) { |