| Message ID | 20221014172427.128512-3-marex@denx.de (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | [v2,1/7] power: supply: bq25890: Document POWER_SUPPLY_PROP_CURRENT_NOW | expand |
Hi, On 10/14/22 19:24, Marek Vasut wrote: > Clean up misuse of POWER_SUPPLY_PROP_VOLTAGE, > POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX > and POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE > and document what exactly each value means. > > The POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE content is newly read > back from hardware, while POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX > is reported as the maximum value set in DT. > > The POWER_SUPPLY_PROP_VOLTAGE is newly used to report immediate value > of battery voltage V_BAT, which is what this property was intended to > report and which has been thus far misused to report the charger chip > output voltage V_SYS. > > The V_SYS is no longer reported as there is currently no suitable > property to report V_SYS. V_SYS reporting will be reinstated in > subsequent patch. > > Signed-off-by: Marek Vasut <marex@denx.de> > --- > Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Cc: Hans de Goede <hdegoede@redhat.com> > Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl> > Cc: Sebastian Reichel <sebastian.reichel@collabora.com> > To: linux-pm@vger.kernel.org > --- > V2: Drop the state online check from new POWER_SUPPLY_PROP_VOLTAGE_NOW > since the VBAT can be measured even when discharging Thanks, patch looks good to me: Reviewed-by: Hans de Goede <hdegoede@redhat.com> Regards, Hans > --- > drivers/power/supply/bq25890_charger.c | 72 ++++++++++++++++---------- > 1 file changed, 45 insertions(+), 27 deletions(-) > > diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c > index 5924b036b1588..050eef2571e8e 100644 > --- a/drivers/power/supply/bq25890_charger.c > +++ b/drivers/power/supply/bq25890_charger.c > @@ -529,24 +529,6 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, > val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; > break; > > - case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: > - if (!state.online) { > - val->intval = 0; > - break; > - } > - > - ret = bq25890_field_read(bq, F_BATV); /* 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; > - > - case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: > - val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG); > - break; > - > case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: > val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM); > break; > @@ -563,15 +545,6 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, > val->intval = bq25890_find_val(ret, TBL_IINLIM); > 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; > - > case POWER_SUPPLY_PROP_CURRENT_NOW: /* I_BAT now */ > /* > * This is ADC-sampled immediate charge current supplied > @@ -628,6 +601,51 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, > val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG); > break; > > + case POWER_SUPPLY_PROP_VOLTAGE_NOW: /* V_BAT now */ > + /* > + * This is ADC-sampled immediate charge voltage supplied > + * from charger to battery. The property name is confusing, > + * for clarification refer to: > + * Documentation/ABI/testing/sysfs-class-power > + * /sys/class/power_supply/<supply_name>/voltage_now > + */ > + ret = bq25890_field_read(bq, F_BATV); /* 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; > + > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: /* V_BAT user limit */ > + /* > + * This is user-configured constant charge voltage supplied > + * from charger to battery in second phase of charging, when > + * battery voltage reached constant charge voltage. > + * > + * This value reflects the current hardware setting. > + * > + * The POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX is the > + * maximum value of this property. > + */ > + ret = bq25890_field_read(bq, F_VREG); > + if (ret < 0) > + return ret; > + > + val->intval = bq25890_find_val(ret, TBL_VREG); > + break; > + > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: /* V_BAT max */ > + /* > + * This is maximum allowed constant charge voltage supplied > + * from charger to battery in second phase of charging, when > + * battery voltage reached constant charge voltage. > + * > + * This value is constant for each battery and set from DT. > + */ > + val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG); > + break; > + > case POWER_SUPPLY_PROP_TEMP: > ret = bq25890_field_read(bq, F_TSPCT); > if (ret < 0)
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c index 5924b036b1588..050eef2571e8e 100644 --- a/drivers/power/supply/bq25890_charger.c +++ b/drivers/power/supply/bq25890_charger.c @@ -529,24 +529,6 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; break; - case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: - if (!state.online) { - val->intval = 0; - break; - } - - ret = bq25890_field_read(bq, F_BATV); /* 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; - - case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: - val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG); - break; - case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM); break; @@ -563,15 +545,6 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, val->intval = bq25890_find_val(ret, TBL_IINLIM); 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; - case POWER_SUPPLY_PROP_CURRENT_NOW: /* I_BAT now */ /* * This is ADC-sampled immediate charge current supplied @@ -628,6 +601,51 @@ static int bq25890_power_supply_get_property(struct power_supply *psy, val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG); break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: /* V_BAT now */ + /* + * This is ADC-sampled immediate charge voltage supplied + * from charger to battery. The property name is confusing, + * for clarification refer to: + * Documentation/ABI/testing/sysfs-class-power + * /sys/class/power_supply/<supply_name>/voltage_now + */ + ret = bq25890_field_read(bq, F_BATV); /* 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; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: /* V_BAT user limit */ + /* + * This is user-configured constant charge voltage supplied + * from charger to battery in second phase of charging, when + * battery voltage reached constant charge voltage. + * + * This value reflects the current hardware setting. + * + * The POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX is the + * maximum value of this property. + */ + ret = bq25890_field_read(bq, F_VREG); + if (ret < 0) + return ret; + + val->intval = bq25890_find_val(ret, TBL_VREG); + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: /* V_BAT max */ + /* + * This is maximum allowed constant charge voltage supplied + * from charger to battery in second phase of charging, when + * battery voltage reached constant charge voltage. + * + * This value is constant for each battery and set from DT. + */ + val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG); + break; + case POWER_SUPPLY_PROP_TEMP: ret = bq25890_field_read(bq, F_TSPCT); if (ret < 0)
Clean up misuse of POWER_SUPPLY_PROP_VOLTAGE, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX and POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE and document what exactly each value means. The POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE content is newly read back from hardware, while POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX is reported as the maximum value set in DT. The POWER_SUPPLY_PROP_VOLTAGE is newly used to report immediate value of battery voltage V_BAT, which is what this property was intended to report and which has been thus far misused to report the charger chip output voltage V_SYS. The V_SYS is no longer reported as there is currently no suitable property to report V_SYS. V_SYS reporting will be reinstated in subsequent patch. Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl> Cc: Sebastian Reichel <sebastian.reichel@collabora.com> To: linux-pm@vger.kernel.org --- V2: Drop the state online check from new POWER_SUPPLY_PROP_VOLTAGE_NOW since the VBAT can be measured even when discharging --- drivers/power/supply/bq25890_charger.c | 72 ++++++++++++++++---------- 1 file changed, 45 insertions(+), 27 deletions(-)