thermal: int340x: Provide notification for OEM variable change

When we receive ACPI notification for OEM variable change pass the
notification to user space handler. This will avoid polling for
OEM variable change from user space.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200915223650.406046-2-srinivas.pandruvada@linux.intel.com

Author: spandruvada

drivers/thermal/intel/int340x_thermal/int3400_thermal.c

@@ -349,30 +349,30 @@ static void int3400_notify(acpi_handle handle,
 {
 	struct int3400_thermal_priv *priv = data;
 	char *thermal_prop[5];
+	int therm_event;
 
 	if (!priv)
 		return;
 
 	switch (event) {
 	case INT3400_THERMAL_TABLE_CHANGED:
-		thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s",
-				priv->thermal->type);
-		thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d",
-				priv->thermal->temperature);
-		thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");
-		thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d",
-				THERMAL_TABLE_CHANGED);
-		thermal_prop[4] = NULL;
-		kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE,
-				thermal_prop);
+		therm_event = THERMAL_TABLE_CHANGED;
 		break;
 	case INT3400_ODVP_CHANGED:
 		evaluate_odvp(priv);
+		therm_event = THERMAL_DEVICE_POWER_CAPABILITY_CHANGED;
 		break;
 	default:
 		/* Ignore unknown notification codes sent to INT3400 device */
-		break;
+		return;
 	}
+
+	thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", priv->thermal->type);
+	thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", priv->thermal->temperature);
+	thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");
+	thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", therm_event);
+	thermal_prop[4] = NULL;
+	kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE, thermal_prop);
 }
 
 static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,