ACPI / Battery: Add the power unit macro

This patch is cosmetic only, and makes no functional change.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index fcc13ac0aa18..611434f413db 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -55,6 +55,9 @@
 #define ACPI_BATTERY_NOTIFY_INFO        0x81
 #define ACPI_BATTERY_NOTIFY_THRESHOLD   0x82
 
+/* Battery power unit: 0 means mW, 1 means mA */
+#define ACPI_BATTERY_POWER_UNIT_MA      1
+
 #define _COMPONENT              ACPI_BATTERY_COMPONENT
 
 ACPI_MODULE_NAME("battery");
@@ -301,7 +304,8 @@ static enum power_supply_property energy_battery_props[] = {
 #ifdef CONFIG_ACPI_PROCFS_POWER
 inline char *acpi_battery_units(struct acpi_battery *battery)
 {
-        return (battery->power_unit)?"mA":"mW";
+        return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
+                "mA" : "mW";
 }
 #endif
 
@@ -544,7 +548,7 @@ static int sysfs_add_battery(struct acpi_battery *battery)
 {
         int result;
 
-        if (battery->power_unit) {
+        if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
                 battery->bat.properties = charge_battery_props;
                 battery->bat.num_properties =
                         ARRAY_SIZE(charge_battery_props);
@@ -575,7 +579,8 @@ static void sysfs_remove_battery(struct acpi_battery *battery)
 
 static void acpi_battery_quirks(struct acpi_battery *battery)
 {
-        if (dmi_name_in_vendors("Acer") && battery->power_unit) {
+        if (dmi_name_in_vendors("Acer") &&
+                battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
                 set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags);
         }
 }