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power: supply: bq25890_charger: Read back the current battery voltage

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The BQ2589x family has the capability of reading the current battery voltage.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Angus Ainslie (Purism) 2018-07-31 11:49:09 -06:00 committed by Sebastian Reichel
parent 2e1a2ddee9
commit ae6fe7a387
1 changed files with 10 additions and 0 deletions
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10
drivers/power/supply/bq25890_charger.c
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@ -461,6 +461,15 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
if (ret < 0)
return ret;
/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
val->intval = 2304000 + ret * 20000;
break;
default:
return -EINVAL;
}
@ -669,6 +678,7 @@ static enum power_supply_property bq25890_power_supply_props[] = {
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static char *bq25890_charger_supplied_to[] = {