ACPI Battery: Added capacity

Added Capacity field, which is a pre-defined power_supply
property. Calculating capacity using current charge/energy and
full charge/energy.
Some user mode implementations are relying on capacity field to
show battery strength and power down decision.

Signed-off-by: srinivas pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 7dd3f9f..5662d64 100644 (file)
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -250,6 +250,13 @@ static int acpi_battery_get_property(struct power_supply *psy,
                else
                        val->intval = battery->capacity_now * 1000;
                break;
+       case POWER_SUPPLY_PROP_CAPACITY:
+               if (battery->capacity_now && battery->full_charge_capacity)
+                       val->intval = battery->capacity_now * 100/
+                                       battery->full_charge_capacity;
+               else
+                       val->intval = 0;
+               break;
        case POWER_SUPPLY_PROP_MODEL_NAME:
                val->strval = battery->model_number;
                break;
@@ -276,6 +283,7 @@ static enum power_supply_property charge_battery_props[] = {
        POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
        POWER_SUPPLY_PROP_CHARGE_FULL,
        POWER_SUPPLY_PROP_CHARGE_NOW,
+       POWER_SUPPLY_PROP_CAPACITY,
        POWER_SUPPLY_PROP_MODEL_NAME,
        POWER_SUPPLY_PROP_MANUFACTURER,
        POWER_SUPPLY_PROP_SERIAL_NUMBER,
@@ -292,6 +300,7 @@ static enum power_supply_property energy_battery_props[] = {
        POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
        POWER_SUPPLY_PROP_ENERGY_FULL,
        POWER_SUPPLY_PROP_ENERGY_NOW,
+       POWER_SUPPLY_PROP_CAPACITY,
        POWER_SUPPLY_PROP_MODEL_NAME,
        POWER_SUPPLY_PROP_MANUFACTURER,
        POWER_SUPPLY_PROP_SERIAL_NUMBER,