From ae6fe7a387e97e2ea8cc275fff5ef55568c4daf3 Mon Sep 17 00:00:00 2001 From: "Angus Ainslie (Purism)" Date: Tue, 31 Jul 2018 11:49:09 -0600 Subject: power: supply: bq25890_charger: Read back the current battery voltage The BQ2589x family has the capability of reading the current battery voltage. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Angus Ainslie (Purism) Signed-off-by: Sebastian Reichel --- drivers/power/supply/bq25890_charger.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c index 23b39da07e56..1aa7872ddeb0 100644 --- a/drivers/power/supply/bq25890_charger.c +++ b/drivers/power/supply/bq25890_charger.c @@ -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[] = { -- cgit v1.2.3