===================================================================
@@ -95,6 +95,7 @@ enum {
* due to bad math.
*/
ACPI_BATTERY_QUIRK_SIGNED16_CURRENT,
+ ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
};
struct acpi_battery {
@@ -405,6 +406,8 @@ static int acpi_battery_get_info(struct
result = extract_package(battery, buffer.pointer,
info_offsets, ARRAY_SIZE(info_offsets));
kfree(buffer.pointer);
+ if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
+ battery->full_charge_capacity = battery->design_capacity;
return result;
}
@@ -441,6 +444,10 @@ static int acpi_battery_get_state(struct
battery->rate_now != -1)
battery->rate_now = abs((s16)battery->rate_now);
+ if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
+ && battery->capacity_now >= 0 && battery->capacity_now <= 100)
+ battery->capacity_now = (battery->capacity_now *
+ battery->full_charge_capacity) / 100;
return result;
}
@@ -552,6 +559,33 @@ static void acpi_battery_quirks(struct a
}
}
+/*
+ * According to the ACPI spec, some kinds of primary batteries can
+ * report percentage battery remaining capacity directly to OS.
+ * In this case, it reports the Last Full Charged Capacity == 100
+ * and BatteryPresentRate == 0xFFFFFFFF.
+ *
+ * Now we found some battery reports percentage remaining capacity
+ * even if it's rechargeable.
+ * https://bugzilla.kernel.org/show_bug.cgi?id=15979
+ *
+ * Handle this correctly so that they won't break userspace.
+ */
+static void acpi_battery_quirks2(struct acpi_battery *battery)
+{
+ if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
+ return ;
+
+ if (battery->full_charge_capacity == 100 &&
+ battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
+ battery->capacity_now >=0 && battery->capacity_now <= 100) {
+ set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
+ battery->full_charge_capacity = battery->design_capacity;
+ battery->capacity_now = (battery->capacity_now *
+ battery->full_charge_capacity) / 100;
+ }
+}
+
static int acpi_battery_update(struct acpi_battery *battery)
{
int result, old_present = acpi_battery_present(battery);
@@ -573,7 +607,9 @@ static int acpi_battery_update(struct ac
}
if (!battery->bat.dev)
sysfs_add_battery(battery);
- return acpi_battery_get_state(battery);
+ result = acpi_battery_get_state(battery);
+ acpi_battery_quirks2(battery);
+ return result;
}
/* --------------------------------------------------------------------------