| Message ID | 20211114170335.66994-5-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | power-suppy/i2c/extcon: Fix charger setup on Xiaomi Mi Pad 2 and Lenovo Yogabook | expand |
Hi, On 11/14/21 18:03, Hans de Goede wrote: > From: Yauhen Kharuzhy <jekhor@gmail.com> > > Take into account possible current reduction due to low-temperature when > reading POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX. As described in > the datasheet in cool (0-20° Celcius) conditions the current limit is > decreased to 20% or 50% of ICHG field value depended on JEITA_ISET field. > > Also add NTC_FAULT field value to the debug message in > bq25890_get_chip_state(). > > Changed by Hans de Goede: > - Fix reading F_CHG_FAULT instead of F_NTC_FIELD for state->ntc_fault > - Only read JEITA_ISET field if necessary > - Tweak commit message a bit > > Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com> > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > drivers/power/supply/bq25890_charger.c | 33 +++++++++++++++++++++++--- > 1 file changed, 30 insertions(+), 3 deletions(-) > > diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c > index b208cc2193b8..617a653221ab 100644 > --- a/drivers/power/supply/bq25890_charger.c > +++ b/drivers/power/supply/bq25890_charger.c > @@ -94,6 +94,7 @@ struct bq25890_state { > u8 vsys_status; > u8 boost_fault; > u8 bat_fault; > + u8 ntc_fault; > }; > > struct bq25890_device { > @@ -383,6 +384,14 @@ enum bq25890_chrg_fault { > CHRG_FAULT_TIMER_EXPIRED, > }; > > +enum bq25890_ntc_fault { > + NTC_FAULT_NORMAL = 0, > + NTC_FAULT_WARM = 2, > + NTC_FAULT_COOL = 3, > + NTC_FAULT_COLD = 5, > + NTC_FAULT_HOT = 6, > +}; > + > static bool bq25890_is_adc_property(enum power_supply_property psp) > { > switch (psp) { > @@ -474,6 +483,18 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, > > case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: > val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG); > + > + /* When temperature is too low, charge current is decreased */ > + if (bq->state.ntc_fault == NTC_FAULT_COOL) { > + ret = bq25890_field_read(bq, F_JEITA_ISET); > + if (ret < 0) > + return ret; > + > + if (ret) > + val->intval /= 5; > + else > + val->intval /= 2; > + } > break; > > case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: > @@ -486,6 +507,10 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, > if (ret < 0) > return ret; > > + ret = bq25890_field_read(bq, F_JEITA_VSET); > + if (ret < 0) > + return ret; > + > /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ > val->intval = 2304000 + ret * 20000; > break; Ugh, this should not be here. I guess this is a leftover from an attempt to also apply temperature correction to the POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE prop. I'll drop this for v3 of the series. Note I'll first wait a week or so for other feedback. Regards, Hans > @@ -549,7 +574,8 @@ static int bq25890_get_chip_state(struct bq25890_device *bq, > {F_VSYS_STAT, &state->vsys_status}, > {F_BOOST_FAULT, &state->boost_fault}, > {F_BAT_FAULT, &state->bat_fault}, > - {F_CHG_FAULT, &state->chrg_fault} > + {F_CHG_FAULT, &state->chrg_fault}, > + {F_NTC_FAULT, &state->ntc_fault} > }; > > for (i = 0; i < ARRAY_SIZE(state_fields); i++) { > @@ -560,9 +586,10 @@ static int bq25890_get_chip_state(struct bq25890_device *bq, > *state_fields[i].data = ret; > } > > - dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n", > + dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n", > state->chrg_status, state->online, state->vsys_status, > - state->chrg_fault, state->boost_fault, state->bat_fault); > + state->chrg_fault, state->boost_fault, state->bat_fault, > + state->ntc_fault); > > return 0; > } >
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c index b208cc2193b8..617a653221ab 100644 --- a/drivers/power/supply/bq25890_charger.c +++ b/drivers/power/supply/bq25890_charger.c @@ -94,6 +94,7 @@ struct bq25890_state { u8 vsys_status; u8 boost_fault; u8 bat_fault; + u8 ntc_fault; }; struct bq25890_device { @@ -383,6 +384,14 @@ enum bq25890_chrg_fault { CHRG_FAULT_TIMER_EXPIRED, }; +enum bq25890_ntc_fault { + NTC_FAULT_NORMAL = 0, + NTC_FAULT_WARM = 2, + NTC_FAULT_COOL = 3, + NTC_FAULT_COLD = 5, + NTC_FAULT_HOT = 6, +}; + static bool bq25890_is_adc_property(enum power_supply_property psp) { switch (psp) { @@ -474,6 +483,18 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG); + + /* When temperature is too low, charge current is decreased */ + if (bq->state.ntc_fault == NTC_FAULT_COOL) { + ret = bq25890_field_read(bq, F_JEITA_ISET); + if (ret < 0) + return ret; + + if (ret) + val->intval /= 5; + else + val->intval /= 2; + } break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: @@ -486,6 +507,10 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, if (ret < 0) return ret; + ret = bq25890_field_read(bq, F_JEITA_VSET); + if (ret < 0) + return ret; + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ val->intval = 2304000 + ret * 20000; break; @@ -549,7 +574,8 @@ static int bq25890_get_chip_state(struct bq25890_device *bq, {F_VSYS_STAT, &state->vsys_status}, {F_BOOST_FAULT, &state->boost_fault}, {F_BAT_FAULT, &state->bat_fault}, - {F_CHG_FAULT, &state->chrg_fault} + {F_CHG_FAULT, &state->chrg_fault}, + {F_NTC_FAULT, &state->ntc_fault} }; for (i = 0; i < ARRAY_SIZE(state_fields); i++) { @@ -560,9 +586,10 @@ static int bq25890_get_chip_state(struct bq25890_device *bq, *state_fields[i].data = ret; } - dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n", + dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n", state->chrg_status, state->online, state->vsys_status, - state->chrg_fault, state->boost_fault, state->bat_fault); + state->chrg_fault, state->boost_fault, state->bat_fault, + state->ntc_fault); return 0; }