| Message ID | 20220607155324.118102-17-aidanmacdonald.0x0@gmail.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | Add support for AXP192 PMIC | expand |
Hi, On Tue, Jun 07, 2022 at 04:53:23PM +0100, Aidan MacDonald wrote: > Add a "has_fg" flag to indicate that the chip has a fuel gauge. > Report battery full status on chips with no fuel gauge using the > battery voltage. > > Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com> > --- Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> -- Sebastian > drivers/power/supply/axp20x_battery.c | 34 ++++++++++++++++++++++++++- > 1 file changed, 33 insertions(+), 1 deletion(-) > > diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c > index 87fb958f2224..e9547e2d7c48 100644 > --- a/drivers/power/supply/axp20x_battery.c > +++ b/drivers/power/supply/axp20x_battery.c > @@ -62,6 +62,7 @@ struct axp_data { > int ccc_scale; > int ccc_offset; > const int *ccc_table; > + bool has_fg; > bool has_fg_valid; > int (*get_max_voltage)(struct axp20x_batt_ps *batt, int *val); > int (*set_max_voltage)(struct axp20x_batt_ps *batt, int val); > @@ -190,7 +191,7 @@ static int axp20x_battery_get_prop(struct power_supply *psy, > union power_supply_propval *val) > { > struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy); > - int ret = 0, reg, val1; > + int ret = 0, reg, val1, val2; > > switch (psp) { > case POWER_SUPPLY_PROP_PRESENT: > @@ -224,6 +225,34 @@ static int axp20x_battery_get_prop(struct power_supply *psy, > return 0; > } > > + /* > + * If the chip does not have a fuel gauge, we check battery full status > + * using voltage instead. > + */ > + if (!axp20x_batt->data->has_fg) { > + ret = axp20x_batt->data->get_max_voltage(axp20x_batt, &val1); > + if (ret) > + return ret; > + > + ret = iio_read_channel_processed(axp20x_batt->batt_v, &val2); > + if (ret) > + return ret; > + > + /* IIO subsystem reports voltage in mV but we need uV */ > + val2 *= 1000; > + > + /* > + * According to the AXP192 datasheet, charging will restart if > + * the battery voltage drops below V_rch = V_tgt - 0.1 V, so we > + * report the battery is full if its voltage is at least V_rch. > + */ > + if (val2 >= val1 - 100000) > + val->intval = POWER_SUPPLY_STATUS_FULL; > + else > + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; > + break; > + } > + > ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, &val1); > if (ret) > return ret; > @@ -546,6 +575,7 @@ static const struct power_supply_desc axp20x_batt_ps_desc = { > static const struct axp_data axp209_data = { > .ccc_scale = 100000, > .ccc_offset = 300000, > + .has_fg = true, > .get_max_voltage = axp20x_battery_get_max_voltage, > .set_max_voltage = axp20x_battery_set_max_voltage, > }; > @@ -553,6 +583,7 @@ static const struct axp_data axp209_data = { > static const struct axp_data axp221_data = { > .ccc_scale = 150000, > .ccc_offset = 300000, > + .has_fg = true, > .has_fg_valid = true, > .get_max_voltage = axp22x_battery_get_max_voltage, > .set_max_voltage = axp22x_battery_set_max_voltage, > @@ -561,6 +592,7 @@ static const struct axp_data axp221_data = { > static const struct axp_data axp813_data = { > .ccc_scale = 200000, > .ccc_offset = 200000, > + .has_fg = true, > .has_fg_valid = true, > .get_max_voltage = axp813_battery_get_max_voltage, > .set_max_voltage = axp20x_battery_set_max_voltage, > -- > 2.35.1 >
diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c index 87fb958f2224..e9547e2d7c48 100644 --- a/drivers/power/supply/axp20x_battery.c +++ b/drivers/power/supply/axp20x_battery.c @@ -62,6 +62,7 @@ struct axp_data { int ccc_scale; int ccc_offset; const int *ccc_table; + bool has_fg; bool has_fg_valid; int (*get_max_voltage)(struct axp20x_batt_ps *batt, int *val); int (*set_max_voltage)(struct axp20x_batt_ps *batt, int val); @@ -190,7 +191,7 @@ static int axp20x_battery_get_prop(struct power_supply *psy, union power_supply_propval *val) { struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy); - int ret = 0, reg, val1; + int ret = 0, reg, val1, val2; switch (psp) { case POWER_SUPPLY_PROP_PRESENT: @@ -224,6 +225,34 @@ static int axp20x_battery_get_prop(struct power_supply *psy, return 0; } + /* + * If the chip does not have a fuel gauge, we check battery full status + * using voltage instead. + */ + if (!axp20x_batt->data->has_fg) { + ret = axp20x_batt->data->get_max_voltage(axp20x_batt, &val1); + if (ret) + return ret; + + ret = iio_read_channel_processed(axp20x_batt->batt_v, &val2); + if (ret) + return ret; + + /* IIO subsystem reports voltage in mV but we need uV */ + val2 *= 1000; + + /* + * According to the AXP192 datasheet, charging will restart if + * the battery voltage drops below V_rch = V_tgt - 0.1 V, so we + * report the battery is full if its voltage is at least V_rch. + */ + if (val2 >= val1 - 100000) + val->intval = POWER_SUPPLY_STATUS_FULL; + else + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + } + ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, &val1); if (ret) return ret; @@ -546,6 +575,7 @@ static const struct power_supply_desc axp20x_batt_ps_desc = { static const struct axp_data axp209_data = { .ccc_scale = 100000, .ccc_offset = 300000, + .has_fg = true, .get_max_voltage = axp20x_battery_get_max_voltage, .set_max_voltage = axp20x_battery_set_max_voltage, }; @@ -553,6 +583,7 @@ static const struct axp_data axp209_data = { static const struct axp_data axp221_data = { .ccc_scale = 150000, .ccc_offset = 300000, + .has_fg = true, .has_fg_valid = true, .get_max_voltage = axp22x_battery_get_max_voltage, .set_max_voltage = axp22x_battery_set_max_voltage, @@ -561,6 +592,7 @@ static const struct axp_data axp221_data = { static const struct axp_data axp813_data = { .ccc_scale = 200000, .ccc_offset = 200000, + .has_fg = true, .has_fg_valid = true, .get_max_voltage = axp813_battery_get_max_voltage, .set_max_voltage = axp20x_battery_set_max_voltage,
Add a "has_fg" flag to indicate that the chip has a fuel gauge. Report battery full status on chips with no fuel gauge using the battery voltage. Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com> --- drivers/power/supply/axp20x_battery.c | 34 ++++++++++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-)