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authorAlexey Starikovskiy <aystarik@gmail.com>2008-11-21 22:41:01 +0800
committerLen Brown <len.brown@intel.com>2008-11-26 17:23:10 -0500
commit558073dd56707864f09d563b64e7c37c021e89d2 (patch)
tree0dcf13ad7676da7ac229b58a758546a70849cbe0 /drivers/acpi
parent7b4d469228a92a00e412675817cedd60133de38a (diff)
ACPI: battery: Convert discharge energy rate to current properly
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/battery.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 1423b0c0cd2e..a0a178dd189c 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -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: