msm8996-common: Import configpanel

Squash of the following:
commit b5d41936b2519b2404b44bc3ce5bd51555732e30
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Tue Jan 15 00:36:22 2019 +0000

    msm8996-common: ConfigPanel: Abandon LineageHardwareManager usage

    Change-Id: I5f0d01222eecbde14887b0298811bdceab65db57

commit 4338acf9a848acbac4a60432e891747d23ba2977
Author: Anton Hansson <hansson@google.com>
Date:   Wed Feb 21 14:11:44 2018 +0000

    msm8996-common: Set LOCAL_SDK_VERSION where possible.

    This change sets LOCAL_SDK_VERSION for all packages where
    this is possible without breaking the build, and
    LOCAL_PRIVATE_PLATFORM_APIS := true otherwise.

    Setting one of these two will be made required soon, and this
    is a change in preparation for that. Not setting LOCAL_SDK_VERSION
    makes the app implicitly depend on the bootclasspath, which is
    often not required. This change effectively makes depending on
    private apis opt-in rather than opt-out.

    Test: make relevant packages
    Bug: 73535841
    Change-Id: Ic906adbd670c4dbfe2cdf0b71cdbeaf9ac08a27e

commit 4c96c168c686c13f1d20a304c9242f2f01b8a103
Author: Giuseppe Barillari <joe2k01dev@gmail.com>
Date:   Sun May 27 21:25:24 2018 +0200

    msm8996-common: configpanel: Define LOCAL_PRIVILEGED_MODULE only once

    Change-Id: I256dd33a1bc69b8295ddcc15db9ccd29167c96dc
    Signed-off-by: Giuseppe Barillari <joe2k01dev@gmail.com>

commit 393fa378f8ebda5d20798e9cec6d86968251c0de
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu May 24 15:33:19 2018 +0100

    msm8996-common: ConfigPanel: Define non-indexable keys

     * This ensures that keys related with unsupported features
       are hidden from search results.

    Change-Id: I2220ff21aee5d8015bea4073073492f4560e3703

commit 0f67e39f803c0c13cca85901760f8f467e18ceed
Author: Giuseppe Barillari <joe2k01dev@gmail.com>
Date:   Sat Feb 24 20:39:11 2018 +0100

    msm8996-common: ConfigPanel: Handle cyttsp reversed keys proc entry

     * This adds support for button swap feature on Mi Note 2

    Change-Id: I82bfa3ed6ed64891cba84d16c07748930cee6272
    Signed-off-by: Giuseppe Barillari <joe2k01dev@gmail.com>

commit d56cfb06245a9af9f87143e50ec9bf563ad7b468
Author: Asher Simonds <dayanhammer@gmail.com>
Date:   Wed Feb 14 00:20:29 2018 +0200

    msm8996-common: ConfigPanel: Add adaptive icon

    Change-Id: I8009c1dd93cc9c6c6d66db550a79a8781a4254b0

commit 1ca4c23c97cf88277e814f2a510892e08313f090
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Tue Feb 13 23:18:08 2018 +0000

    msm8996-common: ConfigPanel: Bump SDK version

    Change-Id: I57d60c73228f47a5267a9536ed058f6053e6ed13

commit 29f2e9cf3b43f7fcb0d4a64179b6f20661ea5491
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu Oct 5 23:33:44 2017 +0100

    msm8996-common: ConfigPanel: Restore back button to the action bar

     * This restores the relevant code that was removed in commit c243b72bf0e5bd460167b7bb7d2f4286a5e4eea8

    Change-Id: I69afd5f8ef4c59f215a201bd76acc3b2015c0a73

commit c130e2f56860a7ab2d0472694c61f8248c2aab2e
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu Oct 5 23:15:51 2017 +0100

    msm8996-common: ConfigPanel: Build with AAPT2

    Change-Id: I0713c2ffd35c768ca863dc36778dbfe0892240f5

commit cf4e4a9554618d2b6b56a1584f78bd03c01c3b36
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu Oct 5 23:08:09 2017 +0100

    msm8996-common: ConfigPanel: Re-integrate into Settings

     * Apply the default Oreo theme and inherit the layouts from Google
       for the Settings app, in order to keep UI consistency.

     * Get rid of SettingsDrawerActivity as it no longer fits in.

     * Add required appcompat and preference support libraries.

     * Integrate into our custom Button settings category by defining the
       expected action.

    Change-Id: Ic2e9768552751a59e49ec00576b202e8223268e7

commit 5be570c80cb12fca9255a094b52e75b79f5a8bb9
Author: Paul Keith <javelinanddart@gmail.com>
Date:   Thu Nov 23 22:14:40 2017 +0100

    msm8996-common: ConfigPanel: Update KeyHandler for API change

    Change-Id: I047e903572d09109b49b554acd5eeecc503d37d1

commit 11a871461baf9a51a7cbdecd47a4f3bea4a47660
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu Oct 5 00:33:30 2017 +0100

    msm8996-common: ConfigPanel: Apply LineageOS rebrand

    Change-Id: I33178e6bc605014033c498ad20c1224e8f4f007d

commit d1eaf445b0f0351f57a81ece523429c8bf85d1b9
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Mon May 1 16:05:43 2017 +0100

    msm8996-common: ConfigPanel: Hide features if unsupported

     * This is required for now as capricorn has a different
       fingerprint driver

    Change-Id: I9c2de516358fd9f1c747682f9232752cfae08c6c

commit 15bb2b153afa11492c72ff41f5b0f03a89e4d54a
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Mon Apr 3 23:33:47 2017 +0100

    msm8996-common: ConfigPanel: Check if PocketMode is installed

     * Because users like to play tricks

    Change-Id: I84c8d5032ef3df5ab2889e957d9a5b6fc270c091

commit 48924c20d0bd54461b4854be9feebcc8584befd6
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Wed Mar 29 23:22:37 2017 +0100

    msm8996-common: Allow control over PocketMode service

     * Once the service is running, proximity sensor is constantly active
       when the display is turned off, resulting into a residual increase
       in battery consumption. Add a toggle so that users can decide whether
       they accept that and prefer to prevent accidental wake-ups triggered
       by the fingerprint sensor.
     * Keep the receiver that listens for the screen status registered only
       if the fingerprint wake-up feature is enabled at the same time as
       the accidental wake-up prevention feature.
     * Set PocketMode as a required module of ConfigPanel, to make sure
       it is only shipped on devices building the latter.

    Change-Id: I5941f445d0bd77be1efa9ffcde2d9854e6446c3d

commit c243b72bf0e5bd460167b7bb7d2f4286a5e4eea8
Author: LuK1337 <priv.luk@gmail.com>
Date:   Wed Mar 29 18:09:37 2017 +0100

    msm8996-common: ConfigPanel: Refactor

     * Integrate more nicely with Settings
     * Remove unnecessary permissions and unused resources
     * Reorganize constants and helper methods

    Change-Id: Id49e3aff5a243201cff5177de78cca26d932a055

commit b74788a08a571421d266e85d9fd384307fa6a86e
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Wed Mar 29 09:39:09 2017 +0000

    msm8996-common: ConfigPanel: Use cmsdk FileUtils wherever it suits

     * Use it in all cases where it suits and ensure that files
       are writable before actually writing to them

    Change-Id: If5c8da1cb80ecf24611b16f961343044939730af

commit 556a10de6c59ec8d9574e7c192324d8d8797e635
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Sat Mar 25 11:08:28 2017 +0000

    msm8996-common: Integrate KeyHandler into ConfigPanel

     * KeyHandler is device-specific (gemini only), but can't really work
       without ConfigPanel, so merge into a single package
     * On the other hand, move the overlays out of the common tree to allow other
       devices to build ConfigPanel without being forced to use the KeyHandler

    Change-Id: I0236ceca21ae47657d43868a4217e3db4699346e

commit 56e7f66124457e4df5878708815b164e0d006e26
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Thu Jan 5 15:49:09 2017 +0000

    gemini: ConfigPanel: Commonize strings translations

     * Translations moved to the new project
         android_packages_resources_devicesettings

    Change-Id: Ic840f76dac5c77d1bd680853ef77d57576d0953f

commit ceaa154c2f38ba3cdbc73c93acc089025f127059
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Wed Dec 14 10:47:49 2016 +0000

    gemini: Support fingerprint as home button

     * Take advantage of the fact that Xiaomi's fingerprint HAL
       now sends KEY_KPENTER (keycode 96) and interpret it as
       KEYCODE_HOME (keycode 102) - a home key event
     * The ability to wake up device using home button can also be enabled
       again because the fingerprint HAL sends key 96 only when
       device is turned on and unlocked

    Change-Id: I29782b73a62724e5b706d6edf366d180893f2ce9

commit 0c7f6b822b25da07b8707238e3e42295a7a5ac5d
Author: Bruno Martins <bgcngm@gmail.com>
Date:   Sat Jan 7 21:14:20 2017 +0000

    gemini: ConfigPanel: Remove unused code

    Change-Id: I14a48c4ab1b138bfba93d0508764b748f5dc9009

commit 0b3629400152a73744ff097f64c5776fa49d8f80
Author: Louis Popi <theh2o64@gmail.com>
Date:   Thu Dec 15 19:46:37 2016 +0100

    gemini: Add fingerprint wakeup option

     * This allows the users to chose whether fingerprint
       wakes up the device

    Change-Id: I6baa53d22293b741aade7a752ff90a0e5a8daaac

commit d5e6991feffc97b8a30cd9e305da62ac474a680f
Author: Willi Ye <williye97@gmail.com>
Date:   Thu Dec 8 21:33:43 2016 +0100

    gemini: ConfigPanel: Update colors to match SystemUI

    Change-Id: Ia919e8e7d15ffd51573c43d143884ed6e7ce91f4

commit ec7fbbf61b586087f4bfae653be4092bd3febb31
Author: Steve Kondik <steve@cyngn.com>
Date:   Wed Oct 5 01:19:59 2016 -0700

    gemini: ConfigPanel: Fix bootup behavior

     * Set the app as direct boot aware so we're able to receive
       the magic broadcast from CMHardwareManager. Otherwise,
       the boot-time initialization never runs.

    Change-Id: I0018dd5265ace37e79b775ff62e4f0686f30fd40

commit 1e41ce03cb81af2e8b16bf0fb36de89372f53723
Author: Louis Popi <theh2o64@gmail.com>
Date:   Thu Oct 20 19:38:27 2016 +0200

    gemini: Add ConfigPanel for button swap

     * Based on Oppo's implementation

    Change-Id: Ia66fd3fed7cc1687862ab1d35578b525a422f0bb

* Full history at https://github.com/LineageOS/android_device_xiaomi_msm8996-common/tree/lineage-16.0/configpanel

Change-Id: If941135420bc10d93c0ad49e2fa7fe0cab82f1ad

24 files changed, 876 insertions, 0 deletions

diff --git a/configpanel/Android.mk b/configpanel/Android.mk
new file mode 100644
index 0000000..5e2fdd0
--- /dev/null
+++ b/configpanel/Android.mk
@@ -0,0 +1,32 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+LOCAL_CERTIFICATE := platform
+LOCAL_PRIVILEGED_MODULE := true
+LOCAL_PACKAGE_NAME := ConfigPanel
+LOCAL_PRIVATE_PLATFORM_APIS := true
+LOCAL_REQUIRED_MODULES := ZukPocketMode
+
+LOCAL_USE_AAPT2 := true
+
+LOCAL_STATIC_ANDROID_LIBRARIES := \
+    android-support-v4 \
+    android-support-v7-appcompat \
+    android-support-v7-preference \
+    android-support-v7-recyclerview \
+    android-support-v13 \
+    android-support-v14-preference \
+
+LOCAL_STATIC_JAVA_LIBRARIES := \
+    org.lineageos.platform.internal
+
+LOCAL_RESOURCE_DIR := \
+    $(LOCAL_PATH)/res \
+    $(TOP)/packages/resources/devicesettings/res
+
+LOCAL_PROGUARD_FLAG_FILES := proguard.flags
+
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_PACKAGE)
diff --git a/configpanel/AndroidManifest.xml b/configpanel/AndroidManifest.xml
new file mode 100644
index 0000000..f62e7fc
--- /dev/null
+++ b/configpanel/AndroidManifest.xml
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2016 The CyanogenMod Project
+     Copyright (C) 2017-2018 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.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.lineageos.settings.device"
+    android:versionCode="6"
+    android:versionName="2.5"
+    android:sharedUserId="android.uid.system">
+
+    <protected-broadcast android:name="org.lineageos.settings.device.CUST_UPDATE" />
+
+    <uses-permission android:name="lineageos.permission.HARDWARE_ABSTRACTION_ACCESS" />
+
+    <uses-sdk
+        android:minSdkVersion="27" />
+
+    <application
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/device_settings_app_name"
+        android:theme="@style/Theme.Main"
+        android:defaultToDeviceProtectedStorage="true"
+        android:directBootAware="true">
+
+        <provider
+            android:name=".ConfigPanelSearchIndexablesProvider"
+            android:authorities="org.lineageos.settings.device"
+            android:multiprocess="false"
+            android:grantUriPermissions="true"
+            android:permission="android.permission.READ_SEARCH_INDEXABLES"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.content.action.SEARCH_INDEXABLES_PROVIDER" />
+            </intent-filter>
+        </provider>
+
+        <activity
+            android:name=".ButtonSettingsActivity"
+            android:label="@string/button_panel_title">
+            <intent-filter>
+                <action android:name="org.lineageos.settings.device.ADDITIONAL_BUTTONS_SETTINGS" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
+        <activity android:name=".KeyHandler" />
+
+        <receiver android:name=".Startup" >
+            <intent-filter>
+                <action android:name="lineageos.intent.action.INITIALIZE_LINEAGE_HARDWARE" />
+            </intent-filter>
+        </receiver>
+    </application>
+
+</manifest>
diff --git a/configpanel/proguard.flags b/configpanel/proguard.flags
new file mode 100644
index 0000000..43b57d9
--- /dev/null
+++ b/configpanel/proguard.flags
@@ -0,0 +1,3 @@
+-keepclasseswithmembers class * {
+    public <init>(android.content.Context, android.util.AttributeSet);
+}
diff --git a/configpanel/res/drawable/ic_settings_additional_buttons.xml b/configpanel/res/drawable/ic_settings_additional_buttons.xml
new file mode 100644
index 0000000..044fc23
--- /dev/null
+++ b/configpanel/res/drawable/ic_settings_additional_buttons.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+   Copyright (c) 2016 The CyanogenMod 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+   android:width="24dp"
+   android:height="24dp"
+   android:viewportWidth="24"
+   android:viewportHeight="24">
+
+    <path
+       android:fillColor="@android:color/white"
+       android:pathData="M17,1L7,1C5.9,1,5,1.9,5,3v2h2v4H5v12c0,1.1,0.9,2,2,2h10c1.1,0,2-0.9,2-2V3C19,1.9,18.1,1,17,1z
+M11,21H7v-2h4V21z M17,21 h-4v-2h4V21z" />
+</vector>
diff --git a/configpanel/res/mipmap-anydpi/ic_launcher.xml b/configpanel/res/mipmap-anydpi/ic_launcher.xml
new file mode 100644
index 0000000..d8649ba
--- /dev/null
+++ b/configpanel/res/mipmap-anydpi/ic_launcher.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2018 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.
+-->
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@mipmap/ic_background"/>
+    <foreground android:drawable="@mipmap/ic_foreground"/>
+</adaptive-icon>
+
diff --git a/configpanel/res/mipmap-hdpi/ic_background.png b/configpanel/res/mipmap-hdpi/ic_background.png
new file mode 100644
index 0000000..f01deeb
--- /dev/null
+++ b/configpanel/res/mipmap-hdpi/ic_background.png
diff --git a/configpanel/res/mipmap-hdpi/ic_foreground.png b/configpanel/res/mipmap-hdpi/ic_foreground.png
new file mode 100644
index 0000000..97158bc
--- /dev/null
+++ b/configpanel/res/mipmap-hdpi/ic_foreground.png
diff --git a/configpanel/res/mipmap-mdpi/ic_background.png b/configpanel/res/mipmap-mdpi/ic_background.png
new file mode 100644
index 0000000..58bcf52
--- /dev/null
+++ b/configpanel/res/mipmap-mdpi/ic_background.png
diff --git a/configpanel/res/mipmap-mdpi/ic_foreground.png b/configpanel/res/mipmap-mdpi/ic_foreground.png
new file mode 100644
index 0000000..7b9bc07
--- /dev/null
+++ b/configpanel/res/mipmap-mdpi/ic_foreground.png
diff --git a/configpanel/res/mipmap-xhdpi/ic_background.png b/configpanel/res/mipmap-xhdpi/ic_background.png
new file mode 100644
index 0000000..681a199
--- /dev/null
+++ b/configpanel/res/mipmap-xhdpi/ic_background.png
diff --git a/configpanel/res/mipmap-xhdpi/ic_foreground.png b/configpanel/res/mipmap-xhdpi/ic_foreground.png
new file mode 100644
index 0000000..c079116
--- /dev/null
+++ b/configpanel/res/mipmap-xhdpi/ic_foreground.png
diff --git a/configpanel/res/mipmap-xxhdpi/ic_background.png b/configpanel/res/mipmap-xxhdpi/ic_background.png
new file mode 100644
index 0000000..1e707e8
--- /dev/null
+++ b/configpanel/res/mipmap-xxhdpi/ic_background.png
diff --git a/configpanel/res/mipmap-xxhdpi/ic_foreground.png b/configpanel/res/mipmap-xxhdpi/ic_foreground.png
new file mode 100644
index 0000000..ecc70af
--- /dev/null
+++ b/configpanel/res/mipmap-xxhdpi/ic_foreground.png
diff --git a/configpanel/res/mipmap-xxxhdpi/ic_background.png b/configpanel/res/mipmap-xxxhdpi/ic_background.png
new file mode 100644
index 0000000..b6e860b
--- /dev/null
+++ b/configpanel/res/mipmap-xxxhdpi/ic_background.png
diff --git a/configpanel/res/mipmap-xxxhdpi/ic_foreground.png b/configpanel/res/mipmap-xxxhdpi/ic_foreground.png
new file mode 100644
index 0000000..3133594
--- /dev/null
+++ b/configpanel/res/mipmap-xxxhdpi/ic_foreground.png
diff --git a/configpanel/res/values/styles.xml b/configpanel/res/values/styles.xml
new file mode 100644
index 0000000..8dbdd4f
--- /dev/null
+++ b/configpanel/res/values/styles.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2014-2016 The CyanogenMod Project
+               (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.
+-->
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <style name="Theme.Main" parent="@android:style/Theme.DeviceDefault.Settings">
+        <item name="preferenceCategoryStyle">@style/Theme.Main.PreferenceCategoryStyle</item>
+        <item name="preferenceFragmentStyle">@style/Theme.Main.PreferenceFragmentStyle</item>
+        <item name="preferenceStyle">@style/Theme.Main.PreferenceStyle</item>
+        <item name="preferenceTheme">@style/Theme.Main.PreferenceTheme</item>
+        <item name="switchPreferenceStyle">@style/Theme.Main.SwitchPreferenceStyle</item>
+    </style>
+
+    <style name="Theme.Main.PreferenceCategoryStyle" parent="@*android:style/Preference.DeviceDefault.Category">
+        <item name="allowDividerAbove">true</item>
+        <item name="allowDividerBelow">true</item>
+        <item name="android:layout">@layout/preference_category_material_settings</item>
+    </style>
+
+    <style name="Theme.Main.PreferenceFragmentStyle" parent="@*android:style/PreferenceFragment.Material">
+        <item name="allowDividerAfterLastItem">false</item>
+    </style>
+
+    <style name="Theme.Main.PreferenceStyle" parent="@*android:style/Preference.DeviceDefault">
+        <item name="allowDividerAbove">false</item>
+        <item name="allowDividerBelow">true</item>
+        <item name="singleLineTitle">false</item>
+        <item name="android:layout">@layout/preference_material_settings</item>
+    </style>
+
+    <style name="Theme.Main.PreferenceTheme">
+    </style>
+
+    <style name="Theme.Main.SwitchPreferenceStyle" parent="@style/Theme.Main.PreferenceStyle">
+        <item name="widgetLayout">@*android:layout/preference_widget_switch</item>
+    </style>
+</resources>
diff --git a/configpanel/res/xml/button_panel.xml b/configpanel/res/xml/button_panel.xml
new file mode 100644
index 0000000..43f4902
--- /dev/null
+++ b/configpanel/res/xml/button_panel.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2016 The CyanogenMod Project
+               (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.
+-->
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <SwitchPreference
+        android:key="button_swap"
+        android:title="@string/button_swap_title"
+        android:summary="@string/button_swap_summary" />
+
+    <PreferenceCategory
+        android:key="fp_key"
+        android:title="@string/fingerprint_title" >
+
+        <SwitchPreference
+            android:key="fp_home"
+            android:title="@string/fingerprint_as_home_title"
+            android:summary="@string/fingerprint_as_home_summary" />
+
+        <SwitchPreference
+            android:key="fp_wakeup"
+            android:title="@string/fingerprint_wakeup_title"
+            android:summary="@string/fingerprint_wakeup_summary" />
+
+        <SwitchPreference
+            android:key="fp_pocketmode"
+            android:title="@string/fingerprint_pocketmode_title"
+            android:summary="@string/fingerprint_pocketmode_summary"
+            android:dependency="fp_wakeup" />
+
+    </PreferenceCategory>
+
+</PreferenceScreen>
diff --git a/configpanel/src/org/lineageos/settings/device/ButtonSettingsActivity.java b/configpanel/src/org/lineageos/settings/device/ButtonSettingsActivity.java
new file mode 100644
index 0000000..737dbd5
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/ButtonSettingsActivity.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *           (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.
+ */
+
+package org.lineageos.settings.device;
+
+import android.os.Bundle;
+import android.preference.PreferenceActivity;
+
+public class ButtonSettingsActivity extends PreferenceActivity {
+
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        getFragmentManager().beginTransaction().replace(android.R.id.content,
+                new ButtonSettingsFragment()).commit();
+    }
+}
diff --git a/configpanel/src/org/lineageos/settings/device/ButtonSettingsFragment.java b/configpanel/src/org/lineageos/settings/device/ButtonSettingsFragment.java
new file mode 100644
index 0000000..b951641
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/ButtonSettingsFragment.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *           (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.
+ */
+
+package org.lineageos.settings.device;
+
+import android.app.ActionBar;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.support.v14.preference.PreferenceFragment;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.Preference.OnPreferenceChangeListener;
+import android.support.v7.preference.PreferenceCategory;
+import android.support.v7.preference.PreferenceManager;
+import android.text.TextUtils;
+import android.view.MenuItem;
+
+import org.lineageos.internal.util.FileUtils;
+import org.lineageos.internal.util.PackageManagerUtils;
+
+public class ButtonSettingsFragment extends PreferenceFragment
+        implements OnPreferenceChangeListener {
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        addPreferencesFromResource(R.xml.button_panel);
+        final ActionBar actionBar = getActivity().getActionBar();
+        actionBar.setDisplayHomeAsUpEnabled(true);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        updatePreferencesBasedOnDependencies();
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+
+        String node = Constants.sBooleanNodePreferenceMap.get(preference.getKey());
+        if (!TextUtils.isEmpty(node) && FileUtils.isFileWritable(node)) {
+            Boolean value = (Boolean) newValue;
+            FileUtils.writeLine(node, value ? "1" : "0");
+            if (Constants.FP_WAKEUP_KEY.equals(preference.getKey())) {
+                value &= prefs.getBoolean(Constants.FP_POCKETMODE_KEY, false);
+                Utils.broadcastCustIntent(getContext(), value);
+            }
+            return true;
+        }
+        node = Constants.sStringNodePreferenceMap.get(preference.getKey());
+        if (!TextUtils.isEmpty(node) && FileUtils.isFileWritable(node)) {
+            FileUtils.writeLine(node, (String) newValue);
+            return true;
+        }
+
+        if (Constants.FP_POCKETMODE_KEY.equals(preference.getKey())) {
+            Utils.broadcastCustIntent(getContext(), (Boolean) newValue);
+            return true;
+        }
+
+        return false;
+    }
+
+    @Override
+    public void addPreferencesFromResource(int preferencesResId) {
+        super.addPreferencesFromResource(preferencesResId);
+        // Initialize node preferences
+        for (String pref : Constants.sBooleanNodePreferenceMap.keySet()) {
+            SwitchPreference b = (SwitchPreference) findPreference(pref);
+            if (b == null) continue;
+            b.setOnPreferenceChangeListener(this);
+            String node = Constants.sBooleanNodePreferenceMap.get(pref);
+            if (FileUtils.isFileReadable(node)) {
+                String curNodeValue = FileUtils.readOneLine(node);
+                b.setChecked(curNodeValue.equals("1"));
+            } else {
+                b.setEnabled(false);
+            }
+        }
+        for (String pref : Constants.sStringNodePreferenceMap.keySet()) {
+            ListPreference l = (ListPreference) findPreference(pref);
+            if (l == null) continue;
+            l.setOnPreferenceChangeListener(this);
+            String node = Constants.sStringNodePreferenceMap.get(pref);
+            if (FileUtils.isFileReadable(node)) {
+                l.setValue(FileUtils.readOneLine(node));
+            } else {
+                l.setEnabled(false);
+            }
+        }
+
+        // Initialize other preferences whose keys are not associated with nodes
+        final PreferenceCategory fingerprintCategory =
+                (PreferenceCategory) getPreferenceScreen().findPreference(Constants.CATEGORY_FP);
+
+        SwitchPreference b = (SwitchPreference) findPreference(Constants.FP_POCKETMODE_KEY);
+        if (!PackageManagerUtils.isAppInstalled(getContext(), "org.lineageos.pocketmode")) {
+            fingerprintCategory.removePreference(b);
+        } else {
+            b.setOnPreferenceChangeListener(this);
+        }
+
+        // Hide fingerprint features if the device doesn't support them
+        if (!FileUtils.fileExists(Constants.FP_HOME_KEY_NODE) &&
+                !FileUtils.fileExists(Constants.FP_WAKEUP_NODE)) {
+            getPreferenceScreen().removePreference(fingerprintCategory);
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            getActivity().onBackPressed();
+            return true;
+        }
+        return false;
+    }
+
+    private void updatePreferencesBasedOnDependencies() {
+        for (String pref : Constants.sNodeDependencyMap.keySet()) {
+            SwitchPreference b = (SwitchPreference) findPreference(pref);
+            if (b == null) continue;
+            String dependencyNode = Constants.sNodeDependencyMap.get(pref)[0];
+            if (FileUtils.isFileReadable(dependencyNode)) {
+                String dependencyNodeValue = FileUtils.readOneLine(dependencyNode);
+                boolean shouldSetEnabled = dependencyNodeValue.equals(
+                        Constants.sNodeDependencyMap.get(pref)[1]);
+                Utils.updateDependentPreference(getContext(), b, pref, shouldSetEnabled);
+            }
+        }
+    }
+}
diff --git a/configpanel/src/org/lineageos/settings/device/ConfigPanelSearchIndexablesProvider.java b/configpanel/src/org/lineageos/settings/device/ConfigPanelSearchIndexablesProvider.java
new file mode 100644
index 0000000..c234791
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/ConfigPanelSearchIndexablesProvider.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *           (C) 2017-2018 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.
+ */
+
+package org.lineageos.settings.device;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.database.MatrixCursor;
+import android.provider.SearchIndexableResource;
+import android.provider.SearchIndexablesProvider;
+
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_NON_INDEXABLE_KEYS_KEY_VALUE;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_CLASS_NAME;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_ICON_RESID;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_INTENT_ACTION;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_INTENT_TARGET_CLASS;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_INTENT_TARGET_PACKAGE;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_RANK;
+import static android.provider.SearchIndexablesContract.COLUMN_INDEX_XML_RES_RESID;
+import static android.provider.SearchIndexablesContract.INDEXABLES_RAW_COLUMNS;
+import static android.provider.SearchIndexablesContract.INDEXABLES_XML_RES_COLUMNS;
+import static android.provider.SearchIndexablesContract.NON_INDEXABLES_KEYS_COLUMNS;
+
+import org.lineageos.internal.util.FileUtils;
+import org.lineageos.internal.util.PackageManagerUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ConfigPanelSearchIndexablesProvider extends SearchIndexablesProvider {
+    private static final String TAG = "ConfigPanelSearchIndexablesProvider";
+
+    public static final int SEARCH_IDX_BUTTON_PANEL = 0;
+
+    private static SearchIndexableResource[] INDEXABLE_RES = new SearchIndexableResource[]{
+            new SearchIndexableResource(1, R.xml.button_panel,
+                    ButtonSettingsActivity.class.getName(),
+                    R.drawable.ic_settings_additional_buttons),
+    };
+
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    @Override
+    public Cursor queryXmlResources(String[] projection) {
+        MatrixCursor cursor = new MatrixCursor(INDEXABLES_XML_RES_COLUMNS);
+        if (Startup.hasButtonProcs() /* show button panel */) {
+            cursor.addRow(generateResourceRef(INDEXABLE_RES[SEARCH_IDX_BUTTON_PANEL]));
+        }
+        return cursor;
+    }
+
+    private static Object[] generateResourceRef(SearchIndexableResource sir) {
+        final Object[] ref = new Object[INDEXABLES_XML_RES_COLUMNS.length];
+        ref[COLUMN_INDEX_XML_RES_RANK] = sir.rank;
+        ref[COLUMN_INDEX_XML_RES_RESID] = sir.xmlResId;
+        ref[COLUMN_INDEX_XML_RES_CLASS_NAME] = null;
+        ref[COLUMN_INDEX_XML_RES_ICON_RESID] = sir.iconResId;
+        ref[COLUMN_INDEX_XML_RES_INTENT_ACTION] = "com.android.settings.action.EXTRA_SETTINGS";
+        ref[COLUMN_INDEX_XML_RES_INTENT_TARGET_PACKAGE] = "org.lineageos.settings.device";
+        ref[COLUMN_INDEX_XML_RES_INTENT_TARGET_CLASS] = sir.className;
+        return ref;
+    }
+
+    private List<String> getNonIndexableKeys(Context context) {
+        List<String> keys = new ArrayList<>();
+        if (!PackageManagerUtils.isAppInstalled(context, "org.lineageos.pocketmode")) {
+            keys.add(Constants.FP_POCKETMODE_KEY);
+        }
+        if (!FileUtils.fileExists(Constants.FP_HOME_KEY_NODE) &&
+                !FileUtils.fileExists(Constants.FP_WAKEUP_NODE)) {
+            keys.add(Constants.FP_HOME_KEY);
+            keys.add(Constants.FP_WAKEUP_KEY);
+        }
+        return keys;
+    }
+
+    @Override
+    public Cursor queryRawData(String[] projection) {
+        MatrixCursor cursor = new MatrixCursor(INDEXABLES_RAW_COLUMNS);
+        return cursor;
+    }
+
+    @Override
+    public Cursor queryNonIndexableKeys(String[] projection) {
+        MatrixCursor cursor = new MatrixCursor(NON_INDEXABLES_KEYS_COLUMNS);
+        final Context context = getContext();
+
+        List<String> nonIndexableKeys = getNonIndexableKeys(context);
+        for (String nik : nonIndexableKeys) {
+            final Object[] ref = new Object[NON_INDEXABLES_KEYS_COLUMNS.length];
+            ref[COLUMN_INDEX_NON_INDEXABLE_KEYS_KEY_VALUE] = nik;
+            cursor.addRow(ref);
+        }
+        return cursor;
+    }
+}
diff --git a/configpanel/src/org/lineageos/settings/device/Constants.java b/configpanel/src/org/lineageos/settings/device/Constants.java
new file mode 100644
index 0000000..b673946
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/Constants.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *           (C) 2017-2018 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.
+ */
+
+package org.lineageos.settings.device;
+
+import org.lineageos.internal.util.FileUtils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Constants {
+
+    // Category keys
+    public static final String CATEGORY_FP = "fp_key";
+
+    // Preference keys
+    public static final String BUTTON_SWAP_KEY = "button_swap";
+    public static final String FP_HOME_KEY = "fp_home";
+    public static final String FP_POCKETMODE_KEY = "fp_pocketmode";
+    public static final String FP_WAKEUP_KEY = "fp_wakeup";
+
+    // Nodes
+    public static final String CYTTSP_BUTTON_SWAP_NODE = "/proc/buttons/reversed_keys_enable";
+    public static final String FP_HOME_KEY_NODE = "/sys/devices/soc/soc:fpc_fpc1020/enable_key_events";
+    public static final String FP_WAKEUP_NODE = "/sys/devices/soc/soc:fpc_fpc1020/enable_wakeup";
+    public static final String TOUCHPANEL_BUTTON_SWAP_NODE = "/proc/touchpanel/reversed_keys_enable";
+    public static final String VIRTUAL_KEYS_NODE = "/proc/touchpanel/capacitive_keys_enable";
+
+    // Intents
+    public static final String CUST_INTENT = "org.lineageos.settings.device.CUST_UPDATE";
+    public static final String CUST_INTENT_EXTRA = "pocketmode_service";
+
+    // Holds <preference_key> -> <proc_node> mapping
+    public static final Map<String, String> sBooleanNodePreferenceMap = new HashMap<>();
+    public static final Map<String, String> sStringNodePreferenceMap = new HashMap<>();
+
+    // Holds <preference_key> -> <default_values> mapping
+    public static final Map<String, Object> sNodeDefaultMap = new HashMap<>();
+
+    // Holds <preference_key> -> <user_set_values> mapping
+    public static final Map<String, Object[]> sNodeUserSetValuesMap = new HashMap<>();
+
+    // Holds <preference_key> -> <dependency_check> mapping
+    public static final Map<String, String[]> sNodeDependencyMap = new HashMap<>();
+
+    public static final String[] sButtonPrefKeys = {
+        BUTTON_SWAP_KEY,
+        FP_HOME_KEY,
+        FP_WAKEUP_KEY
+    };
+
+    static {
+        if (FileUtils.fileExists(Constants.CYTTSP_BUTTON_SWAP_NODE)) {
+            sBooleanNodePreferenceMap.put(BUTTON_SWAP_KEY, CYTTSP_BUTTON_SWAP_NODE);
+        } else if (FileUtils.fileExists(Constants.TOUCHPANEL_BUTTON_SWAP_NODE)) {
+            sBooleanNodePreferenceMap.put(BUTTON_SWAP_KEY, TOUCHPANEL_BUTTON_SWAP_NODE);
+        }
+        sBooleanNodePreferenceMap.put(FP_HOME_KEY, FP_HOME_KEY_NODE);
+        sBooleanNodePreferenceMap.put(FP_WAKEUP_KEY, FP_WAKEUP_NODE);
+
+        sNodeDefaultMap.put(BUTTON_SWAP_KEY, false);
+        sNodeDefaultMap.put(FP_HOME_KEY, false);
+        sNodeDefaultMap.put(FP_WAKEUP_KEY, true);
+
+        sNodeDependencyMap.put(FP_HOME_KEY, new String[]{ VIRTUAL_KEYS_NODE, "1" });
+    }
+}
diff --git a/configpanel/src/org/lineageos/settings/device/KeyHandler.java b/configpanel/src/org/lineageos/settings/device/KeyHandler.java
new file mode 100644
index 0000000..247624b
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/KeyHandler.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2017-2019 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.
+ */
+
+package org.lineageos.settings.device;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.util.Log;
+import android.view.KeyEvent;
+
+import com.android.internal.os.DeviceKeyHandler;
+
+import lineageos.providers.LineageSettings;
+
+import org.lineageos.internal.util.FileUtils;
+
+public class KeyHandler implements DeviceKeyHandler {
+
+    private static final String TAG = KeyHandler.class.getSimpleName();
+
+    private static final String FP_HOME_NODE = "/sys/devices/soc/soc:fpc_fpc1020/enable_key_events";
+
+    private static boolean sScreenTurnedOn = true;
+    private static final boolean DEBUG = false;
+
+    private final Context mContext;
+
+    private final BroadcastReceiver mScreenStateReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
+                sScreenTurnedOn = false;
+            } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
+                sScreenTurnedOn = true;
+            }
+        }
+    };
+
+    public KeyHandler(Context context) {
+        mContext = context;
+
+        IntentFilter screenStateFilter = new IntentFilter();
+        screenStateFilter.addAction(Intent.ACTION_SCREEN_OFF);
+        screenStateFilter.addAction(Intent.ACTION_SCREEN_ON);
+        mContext.registerReceiver(mScreenStateReceiver, screenStateFilter);
+    }
+
+    public KeyEvent handleKeyEvent(KeyEvent event) {
+        boolean virtualKeysEnabled = LineageSettings.System.getIntForUser(
+                mContext.getContentResolver(),
+                LineageSettings.System.FORCE_SHOW_NAVBAR, 0, UserHandle.USER_CURRENT) != 0;
+        boolean fingerprintHomeButtonEnabled = FileUtils.isFileReadable(FP_HOME_NODE) &&
+                FileUtils.readOneLine(FP_HOME_NODE).equals("1");
+
+        if (!hasSetupCompleted()) {
+            return event;
+        }
+
+        if (event.getKeyCode() == KeyEvent.KEYCODE_HOME) {
+            if (event.getScanCode() == 96) {
+                if (DEBUG) Log.d(TAG, "Fingerprint home button tapped");
+                return virtualKeysEnabled ? null : event;
+            }
+            if (event.getScanCode() == 102) {
+                if (DEBUG) Log.d(TAG, "Mechanical home button pressed");
+                return sScreenTurnedOn &&
+                        (virtualKeysEnabled || fingerprintHomeButtonEnabled) ? null : event;
+            }
+        }
+        return event;
+    }
+
+    private boolean hasSetupCompleted() {
+        return Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.USER_SETUP_COMPLETE, 0) != 0;
+    }
+}
diff --git a/configpanel/src/org/lineageos/settings/device/Startup.java b/configpanel/src/org/lineageos/settings/device/Startup.java
new file mode 100644
index 0000000..4311cb5
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/Startup.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *           (C) 2017-2018 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.
+ */
+
+package org.lineageos.settings.device;
+
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.SharedPreferences;
+import android.support.v7.preference.PreferenceManager;
+import android.util.Log;
+
+import org.lineageos.internal.util.FileUtils;
+
+public class Startup extends BroadcastReceiver {
+
+    private static final String TAG = Startup.class.getSimpleName();
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        final String action = intent.getAction();
+        if (lineageos.content.Intent.ACTION_INITIALIZE_LINEAGE_HARDWARE.equals(action)) {
+            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+
+            // Disable button settings if needed
+            if (!hasButtonProcs()) {
+                disableComponent(context, ButtonSettingsActivity.class.getName());
+            } else {
+                enableComponent(context, ButtonSettingsActivity.class.getName());
+
+                // Restore nodes to saved preference values
+                for (String pref : Constants.sButtonPrefKeys) {
+                    String node, value;
+                    if (Constants.sStringNodePreferenceMap.containsKey(pref)) {
+                        node = Constants.sStringNodePreferenceMap.get(pref);
+                        value = Utils.getPreferenceString(context, pref);
+                    } else {
+                        node = Constants.sBooleanNodePreferenceMap.get(pref);
+                        value = Utils.isPreferenceEnabled(context, pref) ? "1" : "0";
+                    }
+                    if (!FileUtils.writeLine(node, value)) {
+                        Log.w(TAG, "Write to node " + node +
+                            " failed while restoring saved preference values");
+                    }
+                }
+
+                // Send initial broadcasts
+                final boolean shouldEnablePocketMode =
+                        prefs.getBoolean(Constants.FP_WAKEUP_KEY, false) &&
+                        prefs.getBoolean(Constants.FP_POCKETMODE_KEY, false);
+                Utils.broadcastCustIntent(context, shouldEnablePocketMode);
+            }
+        }
+    }
+
+    static boolean hasButtonProcs() {
+        return (FileUtils.fileExists(Constants.CYTTSP_BUTTON_SWAP_NODE) ||
+                FileUtils.fileExists(Constants.FP_HOME_KEY_NODE) ||
+                FileUtils.fileExists(Constants.FP_WAKEUP_NODE) ||
+                FileUtils.fileExists(Constants.TOUCHPANEL_BUTTON_SWAP_NODE));
+    }
+
+    private void disableComponent(Context context, String component) {
+        ComponentName name = new ComponentName(context, component);
+        PackageManager pm = context.getPackageManager();
+        pm.setComponentEnabledSetting(name,
+                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+                PackageManager.DONT_KILL_APP);
+    }
+
+    private void enableComponent(Context context, String component) {
+        ComponentName name = new ComponentName(context, component);
+        PackageManager pm = context.getPackageManager();
+        if (pm.getComponentEnabledSetting(name)
+                == PackageManager.COMPONENT_ENABLED_STATE_DISABLED) {
+            pm.setComponentEnabledSetting(name,
+                    PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+                    PackageManager.DONT_KILL_APP);
+        }
+    }
+}
diff --git a/configpanel/src/org/lineageos/settings/device/Utils.java b/configpanel/src/org/lineageos/settings/device/Utils.java
new file mode 100644
index 0000000..9b3b2d7
--- /dev/null
+++ b/configpanel/src/org/lineageos/settings/device/Utils.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ *           (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.
+ */
+
+package org.lineageos.settings.device;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.UserHandle;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceManager;
+
+public class Utils {
+
+    public static boolean isPreferenceEnabled(Context context, String key) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        return preferences.getBoolean(key, (Boolean) Constants.sNodeDefaultMap.get(key));
+    }
+
+    public static String getPreferenceString(Context context, String key) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        return preferences.getString(key, (String) Constants.sNodeDefaultMap.get(key));
+    }
+
+    public static void updateDependentPreference(Context context, SwitchPreference b,
+            String key, boolean shouldSetEnabled) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        boolean prefActualValue = preferences.getBoolean(key, false);
+
+        if (shouldSetEnabled) {
+            if (Constants.sNodeUserSetValuesMap.get(key) != null &&
+                    (Boolean) Constants.sNodeUserSetValuesMap.get(key)[1] &&
+                    (Boolean) Constants.sNodeUserSetValuesMap.get(key)[1] != prefActualValue) {
+                b.setChecked(true);
+                Constants.sNodeUserSetValuesMap.put(key, new Boolean[]{ prefActualValue, false });
+            }
+        } else {
+            if (b.isEnabled() && prefActualValue) {
+                Constants.sNodeUserSetValuesMap.put(key, new Boolean[]{ prefActualValue, true });
+            }
+            b.setEnabled(false);
+            b.setChecked(false);
+        }
+    }
+
+    public static void broadcastCustIntent(Context context, boolean value) {
+        final Intent intent = new Intent(Constants.CUST_INTENT);
+        intent.putExtra(Constants.CUST_INTENT_EXTRA, value);
+        context.sendBroadcastAsUser(intent, UserHandle.CURRENT);
+    }
+}