diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:47:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:47:28 +0100 |
| commit | 7df4edb07cf54a4868b9a750424c0d2aa68f8d66 (patch) | |
| tree | 0ad0ad3f3dcb6f9edf26dde42ba625053dddf54f /drivers/acpi/battery.c | |
| parent | 0d688da5505d77bcef2441e0a22d8cc26459702d (diff) | |
| parent | 559595a985e106d2fa9f0c79b7f5805453fed593 (diff) | |
Merge branch 'linus' into core/iommu
Diffstat (limited to 'drivers/acpi/battery.c')
| -rw-r--r-- | drivers/acpi/battery.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 65132f92045..69cbc57c2d1 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -138,6 +138,29 @@ static int acpi_battery_technology(struct acpi_battery *battery) static int acpi_battery_get_state(struct acpi_battery *battery); +static int acpi_battery_is_charged(struct acpi_battery *battery) +{ + /* either charging or discharging */ + if (battery->state != 0) + return 0; + + /* battery not reporting charge */ + if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || + battery->capacity_now == 0) + return 0; + + /* good batteries update full_charge as the batteries degrade */ + if (battery->full_charge_capacity == battery->capacity_now) + return 1; + + /* fallback to using design values for broken batteries */ + if (battery->design_capacity == battery->capacity_now) + return 1; + + /* we don't do any sort of metric based on percentages */ + return 0; +} + static int acpi_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -155,7 +178,7 @@ static int acpi_battery_get_property(struct power_supply *psy, val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (battery->state & 0x02) val->intval = POWER_SUPPLY_STATUS_CHARGING; - else if (battery->state == 0) + else if (acpi_battery_is_charged(battery)) val->intval = POWER_SUPPLY_STATUS_FULL; else val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |