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ACPI: battery: Convert discharge energy rate to current properly

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ACPI battery interface reports its state either in mW or in mA, and
discharge rate in your case is reported in mW. power_supply interface
does not have such a parameter, so current_now parameter is used
for all cases. But in case of mW, reported discharge should
be converted into mA.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Tested-by: Ferenc Wagner <wferi@niif.hu>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2008-11-21 22:41:01 +08:00 committed by Len Brown
parent 7b4d469228
commit 558073dd56
1 changed files with 9 additions and 0 deletions
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9
drivers/acpi/battery.c
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@ -174,6 +174,15 @@ static int acpi_battery_get_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = battery->current_now * 1000;
/* if power units are mW, convert to mA by
dividing by current voltage (mV/1000) */
if (!battery->power_unit) {
if (battery->voltage_now) {
val->intval /= battery->voltage_now;
val->intval *= 1000;
} else
val->intval = -1;
}
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: