diff options
| -rw-r--r-- | drivers/acpi/battery.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index b4580b2e8706..96ed134bacf8 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -121,6 +121,10 @@ enum { post-1.29 BIOS), but as of Nov. 2012, no such update is available for the 2010 models. */ ACPI_BATTERY_QUIRK_THINKPAD_MAH, + /* for batteries reporting current capacity with design capacity + * on a full charge, but showing degradation in full charge cap. + */ + ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, }; struct acpi_battery { @@ -207,6 +211,12 @@ static int acpi_battery_is_charged(struct acpi_battery *battery) return 0; } +static bool acpi_battery_is_degraded(struct acpi_battery *battery) +{ + return battery->full_charge_capacity && battery->design_capacity && + battery->full_charge_capacity < battery->design_capacity; +} + static int acpi_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -483,6 +493,10 @@ static int extract_battery_info(const int use_bix, it's impossible to tell if they would need an adjustment or not if their values were higher. */ } + if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && + battery->capacity_now > battery->full_charge_capacity) + battery->capacity_now = battery->full_charge_capacity; + return result; } @@ -575,6 +589,10 @@ static int acpi_battery_get_state(struct acpi_battery *battery) battery->capacity_now = battery->capacity_now * 10000 / battery->design_voltage; } + if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && + battery->capacity_now > battery->full_charge_capacity) + battery->capacity_now = battery->full_charge_capacity; + return result; } @@ -885,6 +903,15 @@ static void acpi_battery_quirks(struct acpi_battery *battery) } } } + + if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags)) + return; + + if (acpi_battery_is_degraded(battery) && + battery->capacity_now > battery->full_charge_capacity) { + set_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags); + battery->capacity_now = battery->full_charge_capacity; + } } static int acpi_battery_update(struct acpi_battery *battery, bool resume) |