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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-26 15:22:13 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-26 15:22:13 +0300 |
| commit | 4434e5156409eb3ec98f5ad7f0a0c07ebafe970d (patch) | |
| tree | c7f148cdae7a6cf4013253c6c2dbd1c49e837e32 /drivers/acpi/battery.c | |
| parent | 2b8f836fb196acede88b6cc772e9057e0a9c0223 (diff) | |
| parent | 694593e3374a67d95ece6a275a1f181644c2c4d8 (diff) | |
| download | linux-4434e5156409eb3ec98f5ad7f0a0c07ebafe970d.tar.xz | |
Merge branches 'sched/cleanups', 'sched/urgent' and 'linus' into sched/core
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 65132f920459..69cbc57c2d1c 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; |