diff options
Diffstat (limited to 'drivers/power/supply/max17042_battery.c')
| -rw-r--r-- | drivers/power/supply/max17042_battery.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index 5b556a13f517..102b3f71e9a4 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -123,6 +123,8 @@ static int max17042_get_temperature(struct max17042_chip *chip, int *temp) static int max17042_get_status(struct max17042_chip *chip, int *status) { int ret, charge_full, charge_now; + int avg_current; + u32 data; ret = power_supply_am_i_supplied(chip->battery); if (ret < 0) { @@ -152,10 +154,31 @@ static int max17042_get_status(struct max17042_chip *chip, int *status) if (ret < 0) return ret; - if ((charge_full - charge_now) <= MAX17042_FULL_THRESHOLD) + if ((charge_full - charge_now) <= MAX17042_FULL_THRESHOLD) { *status = POWER_SUPPLY_STATUS_FULL; - else + return 0; + } + + /* + * Even though we are supplied, we may still be discharging if the + * supply is e.g. only delivering 5V 0.5A. Check current if available. + */ + if (!chip->pdata->enable_current_sense) { + *status = POWER_SUPPLY_STATUS_CHARGING; + return 0; + } + + ret = regmap_read(chip->regmap, MAX17042_AvgCurrent, &data); + if (ret < 0) + return ret; + + avg_current = sign_extend32(data, 15); + avg_current *= 1562500 / chip->pdata->r_sns; + + if (avg_current > 0) *status = POWER_SUPPLY_STATUS_CHARGING; + else + *status = POWER_SUPPLY_STATUS_DISCHARGING; return 0; } |