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power: supply: sbs-battery: Improve POWER_SUPPLY_PROP_TECHNOLOGY support

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This reads the battery chemistry from the battery chip instead
of incorrectly hardcoding the type to be Li-Ion.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Sebastian Reichel 2020-05-13 20:56:06 +02:00 committed by Sebastian Reichel
parent 8ce6ee43bd
commit 3e9544f7a3
1 changed files with 41 additions and 2 deletions
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43
drivers/power/supply/sbs-battery.c
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@ -43,6 +43,7 @@ enum {
REG_DESIGN_CAPACITY_CHARGE,
REG_DESIGN_VOLTAGE_MIN,
REG_DESIGN_VOLTAGE_MAX,
REG_CHEMISTRY,
REG_MANUFACTURER,
REG_MODEL_NAME,
};
@ -133,7 +134,9 @@ static const struct chip_data {
[REG_MANUFACTURER] =
SBS_DATA(POWER_SUPPLY_PROP_MANUFACTURER, 0x20, 0, 65535),
[REG_MODEL_NAME] =
SBS_DATA(POWER_SUPPLY_PROP_MODEL_NAME, 0x21, 0, 65535)
SBS_DATA(POWER_SUPPLY_PROP_MODEL_NAME, 0x21, 0, 65535),
[REG_CHEMISTRY] =
SBS_DATA(POWER_SUPPLY_PROP_TECHNOLOGY, 0x22, 0, 65535)
};
static enum power_supply_property sbs_properties[] = {
@ -185,6 +188,7 @@ struct sbs_info {
static char model_name[I2C_SMBUS_BLOCK_MAX + 1];
static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1];
static char chemistry[I2C_SMBUS_BLOCK_MAX + 1];
static bool force_load;
static int sbs_update_presence(struct sbs_info *chip, bool is_present)
@ -636,6 +640,38 @@ static int sbs_get_property_index(struct i2c_client *client,
return -EINVAL;
}
static int sbs_get_chemistry(struct i2c_client *client,
union power_supply_propval *val)
{
enum power_supply_property psp = POWER_SUPPLY_PROP_TECHNOLOGY;
int ret;
ret = sbs_get_property_index(client, psp);
if (ret < 0)
return ret;
ret = sbs_get_battery_string_property(client, ret, psp,
chemistry);
if (ret < 0)
return ret;
if (!strncasecmp(chemistry, "LION", 4))
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
else if (!strncasecmp(chemistry, "LiP", 3))
val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO;
else if (!strncasecmp(chemistry, "NiCd", 4))
val->intval = POWER_SUPPLY_TECHNOLOGY_NiCd;
else if (!strncasecmp(chemistry, "NiMH", 4))
val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
else
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
if (val->intval == POWER_SUPPLY_TECHNOLOGY_UNKNOWN)
dev_warn(&client->dev, "Unknown chemistry: %s\n", chemistry);
return 0;
}
static int sbs_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
@ -673,7 +709,10 @@ static int sbs_get_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
ret = sbs_get_chemistry(client, val);
if (ret < 0)
break;
goto done; /* don't trigger power_supply_changed()! */
case POWER_SUPPLY_PROP_ENERGY_NOW: