battery: Add the ThinkPad "Not Charging" quirk

index 2951d07..1afc9c7 100644
@@ -57,6 +57,13 @@
 #define ACPI_BATTERY_STATE_DISCHARGING	0x1
 #define ACPI_BATTERY_STATE_CHARGING	0x2
 #define ACPI_BATTERY_STATE_CRITICAL	0x4
+/*
+ * On Lenovo ThinkPads the ACPI firmware
+ * returns a custom response when the battery
+ * is configured with wear control and the battery
+ * is between the start and stop charge thresholds.
+ */
+#define ACPI_BATTERY_STATE_NOT_CHARGING 0x8
 
 #define _COMPONENT		ACPI_BATTERY_COMPONENT
 

@@ -71,6 +78,7 @@ static async_cookie_t async_cookie;
 static bool battery_driver_registered;
 static int battery_bix_broken_package;
 static int battery_notification_delay_ms;
+static int battery_quirk_thinkpad_notcharging;
 static unsigned int cache_time = 1000;
 module_param(cache_time, uint, 0644);
 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");

@@ -222,6 +230,9 @@ static int acpi_battery_get_property(struct power_supply *psy,
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
 		else if (acpi_battery_is_charged(battery))
 			val->intval = POWER_SUPPLY_STATUS_FULL;
+		else if (battery_quirk_thinkpad_notcharging &&
+				val->intval & ACPI_BATTERY_STATE_NOT_CHARGING)
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
 		else
 			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 		break;

@@ -1301,6 +1312,13 @@ battery_notification_delay_quirk(const struct dmi_system_id *d)
 	return 0;
 }
 
+static int __init
+battery_quirk_not_charging(const struct dmi_system_id *d)
+{
+	battery_quirk_thinkpad_notcharging = 1;
+	return 0;
+}
+
 static const struct dmi_system_id bat_dmi_table[] __initconst = {
 	{
 		.callback = battery_bix_broken_package_quirk,

@@ -1318,6 +1336,14 @@ static const struct dmi_system_id bat_dmi_table[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
 		},
 	},
+	{
+		.callback = battery_quirk_not_charging,
+		.ident = "Lenovo ThinkPad",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad"),
+		},
+	},
 	{},
 };