msm8976-common: Add PowerHAL extension for touch screen & keys

* Add extension to disable touchkeys and touchscreen
  when display blank is triggered

Change-Id: I83060caa6b894fc3b80e5907acc3c483fc6176cb

BoardConfigCommon.mk

@@ -168,6 +168,7 @@ TARGET_PROVIDES_KEYMASTER := true
 TARGET_PER_MGR_ENABLED := true
 
 # Power
+TARGET_POWERHAL_SET_INTERACTIVE_EXT := $(VENDOR_PATH)/power/power_ext.c
 TARGET_POWERHAL_VARIANT := qcom
 
 # Properties

power/power_ext.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2014 The CyanogenMod Project
+ * Copyright (c) 2017 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "PowerHAL_H_Ext"
+#include <utils/Log.h>
+
+#include "utils.h"
+
+/* touchkeys */
+#define TK_POWER "/sys/class/sec/sec_touchkey/input/enabled"
+
+/* touchscreen */
+#define TS_POWER "/sys/class/sec/tsp/input/enabled"
+
+void cm_power_set_interactive_ext(int on) {
+    ALOGD("%s: %s input devices", __func__, on ? "enabling" : "disabling");
+    sysfs_write(TK_POWER, on ? "1" : "0");
+    sysfs_write(TS_POWER, on ? "1" : "0");
+}