diff options
| -rw-r--r-- | board/pyro/battery.c | 66 | ||||
| -rw-r--r-- | board/snappy/battery.c | 66 |
2 files changed, 82 insertions, 50 deletions
diff --git a/board/pyro/battery.c b/board/pyro/battery.c index a0c9244514..9d2294bb9c 100644 --- a/board/pyro/battery.c +++ b/board/pyro/battery.c @@ -193,6 +193,46 @@ enum battery_disconnect_state battery_get_disconnect_state(void) static int fast_charging_allowed = 1; +static int charger_should_discharge_on_ac(struct charge_state_data *curr) +{ + /* can not discharge on AC without battery */ + if (curr->batt.is_present != BP_YES) + return 0; + + /* Do not discharge on AC if the battery is still waking up */ + if (!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) && + !(curr->batt.status & STATUS_FULLY_CHARGED)) + return 0; + + /* + * In light load (<450mA being withdrawn from VSYS) the DCDC of the + * charger operates intermittently i.e. DCDC switches continuously + * and then stops to regulate the output voltage and current, and + * sometimes to prevent reverse current from flowing to the input. + * This causes a slight voltage ripple on VSYS that falls in the + * audible noise frequency (single digit kHz range). This small + * ripple generates audible noise in the output ceramic capacitors + * (caps on VSYS and any input of DCDC under VSYS). + * + * To overcome this issue enable the battery learning operation + * and suspend USB charging and DC/DC converter. + */ + if (!battery_is_cut_off() && + !(curr->batt.flags & BATT_FLAG_WANT_CHARGE) && + (curr->batt.status & STATUS_FULLY_CHARGED)) + return 1; + + /* + * To avoid inrush current from the external charger, enable + * discharge on AC till the new charger is detected and charge + * detect delay has passed. + */ + if (!chg_ramp_is_detected() && curr->batt.state_of_charge > 2) + return 1; + + return 0; +} + /* * This can override the smart battery's charging profile. To make a change, * modify one or more of requested_voltage, requested_current, or state. @@ -223,31 +263,7 @@ int charger_profile_override(struct charge_state_data *curr) /* Current and previous battery voltage */ int batt_voltage; static int prev_batt_voltage; - int disch_on_ac; - - /* - * In light load (<450mA being withdrawn from VSYS) the DCDC of the - * charger operates intermittently i.e. DCDC switches continuously - * and then stops to regulate the output voltage and current, and - * sometimes to prevent reverse current from flowing to the input. - * This causes a slight voltage ripple on VSYS that falls in the - * audible noise frequency (single digit kHz range). This small - * ripple generates audible noise in the output ceramic capacitors - * (caps on VSYS and any input of DCDC under VSYS). - * - * To overcome this issue enable the battery learning operation - * and suspend USB charging and DC/DC converter. - * - * And also to avoid inrush current from the external charger, enable - * discharge on AC till the new charger is detected and charge detect - * delay has passed. - */ - disch_on_ac = (curr->batt.is_present == BP_YES && - !battery_is_cut_off() && - !(curr->batt.flags & BATT_FLAG_WANT_CHARGE) && - curr->batt.status & STATUS_FULLY_CHARGED; - (!chg_ramp_is_detected() && - curr->batt.state_of_charge > 2); + int disch_on_ac = charger_should_discharge_on_ac(curr); charger_discharge_on_ac(disch_on_ac); diff --git a/board/snappy/battery.c b/board/snappy/battery.c index 4991c9cfeb..c192edc2b1 100644 --- a/board/snappy/battery.c +++ b/board/snappy/battery.c @@ -121,6 +121,46 @@ enum battery_disconnect_state battery_get_disconnect_state(void) static int fast_charging_allowed = 1; +static int charger_should_discharge_on_ac(struct charge_state_data *curr) +{ + /* can not discharge on AC without battery */ + if (curr->batt.is_present != BP_YES) + return 0; + + /* Do not discharge on AC if the battery is still waking up */ + if (!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) && + !(curr->batt.status & STATUS_FULLY_CHARGED)) + return 0; + + /* + * In light load (<450mA being withdrawn from VSYS) the DCDC of the + * charger operates intermittently i.e. DCDC switches continuously + * and then stops to regulate the output voltage and current, and + * sometimes to prevent reverse current from flowing to the input. + * This causes a slight voltage ripple on VSYS that falls in the + * audible noise frequency (single digit kHz range). This small + * ripple generates audible noise in the output ceramic capacitors + * (caps on VSYS and any input of DCDC under VSYS). + * + * To overcome this issue enable the battery learning operation + * and suspend USB charging and DC/DC converter. + */ + if (!battery_is_cut_off() && + !(curr->batt.flags & BATT_FLAG_WANT_CHARGE) && + (curr->batt.status & STATUS_FULLY_CHARGED)) + return 1; + + /* + * To avoid inrush current from the external charger, enable + * discharge on AC till the new charger is detected and charge + * detect delay has passed. + */ + if (!chg_ramp_is_detected() && curr->batt.state_of_charge > 2) + return 1; + + return 0; +} + /* * This can override the smart battery's charging profile. To make a change, * modify one or more of requested_voltage, requested_current, or state. @@ -151,31 +191,7 @@ int charger_profile_override(struct charge_state_data *curr) /* Current and previous battery voltage */ int batt_voltage; static int prev_batt_voltage; - int disch_on_ac; - - /* - * In light load (<450mA being withdrawn from VSYS) the DCDC of the - * charger operates intermittently i.e. DCDC switches continuously - * and then stops to regulate the output voltage and current, and - * sometimes to prevent reverse current from flowing to the input. - * This causes a slight voltage ripple on VSYS that falls in the - * audible noise frequency (single digit kHz range). This small - * ripple generates audible noise in the output ceramic capacitors - * (caps on VSYS and any input of DCDC under VSYS). - * - * To overcome this issue enable the battery learning operation - * and suspend USB charging and DC/DC converter. - * - * And also to avoid inrush current from the external charger, enable - * discharge on AC till the new charger is detected and charge detect - * delay has passed. - */ - disch_on_ac = (curr->batt.is_present == BP_YES && - !battery_is_cut_off() && - !(curr->batt.flags & BATT_FLAG_WANT_CHARGE) && - curr->batt.status & STATUS_FULLY_CHARGED; - (!chg_ramp_is_detected() && - curr->batt.state_of_charge > 2); + int disch_on_ac = charger_should_discharge_on_ac(curr); charger_discharge_on_ac(disch_on_ac); |