diff --git a/device.mk b/device.mk
index ae1535f..28aa35e 100644
--- a/device.mk
+++ b/device.mk
@@ -21,6 +21,10 @@ PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/rootdir/etc/fstab.qcom:$(TARGET_COPY_OUT_RAMDISK)/fstab.qcom \
     $(LOCAL_PATH)/rootdir/etc/fstab.qcom:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.qcom
 
+# Overlay
+DEVICE_PACKAGE_OVERLAYS += \
+    $(LOCAL_PATH)/overlay
+
 # Partitions
 PRODUCT_BUILD_SUPER_PARTITION := false
 PRODUCT_USE_DYNAMIC_PARTITIONS := true
diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
new file mode 100644
index 0000000..184a23d
--- /dev/null
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -0,0 +1,249 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+** Copyright 2009, The Android Open Source 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.
+*/
+-->
+
+<!-- These resources are around just to allow their values to be customized
+     for different hardware and product builds.  Do not translate.
+
+     NOTE: The naming convention is "config_camelCaseValue". Some legacy
+     entries do not follow the convention, but all new entries should. -->
+
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <!-- Flag indicating whether the we should enable the automatic brightness in Settings.
+         Software implementation will be used if config_hardware_auto_brightness_available is not set -->
+    <bool name="config_automatic_brightness_available">true</bool>
+
+    <!-- Array of light sensor lux values to define our levels for auto backlight brightness support.
+         The N entries of this array define N + 1 control points as follows:
+         (1-based arrays)
+
+         Point 1:            (0, value[1]):             lux <= 0
+         Point 2:     (level[1], value[2]):  0        < lux <= level[1]
+         Point 3:     (level[2], value[3]):  level[2] < lux <= level[3]
+         ...
+         Point N+1: (level[N], value[N+1]):  level[N] < lux
+
+         The control points must be strictly increasing.  Each control point
+         corresponds to an entry in the brightness backlight values arrays.
+         For example, if lux == level[1] (first element of the levels array)
+         then the brightness will be determined by value[2] (second element
+         of the brightness values array).
+
+         Spline interpolation is used to determine the auto-brightness
+         backlight values for lux levels between these control points.
+
+         Must be overridden in platform specific overlays -->
+    <integer-array name="config_autoBrightnessLevels">
+        <item>1</item>
+        <item>2</item>
+        <item>4</item>
+        <item>6</item>
+        <item>8</item>
+        <item>10</item>
+        <item>15</item>
+        <item>20</item>
+        <item>25</item>
+        <item>30</item>
+        <item>35</item>
+        <item>40</item>
+        <item>45</item>
+        <item>50</item>
+        <item>55</item>
+        <item>60</item>
+        <item>65</item>
+        <item>70</item>
+        <item>75</item>
+        <item>80</item>
+        <item>85</item>
+        <item>90</item>
+        <item>95</item>
+        <item>100</item>
+        <item>120</item>
+        <item>140</item>
+        <item>160</item>
+        <item>180</item>
+        <item>200</item>
+        <item>220</item>
+        <item>240</item>
+        <item>260</item>
+        <item>280</item>
+        <item>300</item>
+        <item>320</item>
+        <item>340</item>
+        <item>360</item>
+        <item>380</item>
+        <item>400</item>
+        <item>420</item>
+        <item>440</item>
+        <item>460</item>
+        <item>480</item>
+        <item>500</item>
+        <item>700</item>
+        <item>900</item>
+        <item>1100</item>
+        <item>1300</item>
+        <item>1500</item>
+        <item>1700</item>
+        <item>1900</item>
+        <item>2000</item>
+        <item>2500</item>
+        <item>3000</item>
+        <item>3500</item>
+        <item>4000</item>
+        <item>4500</item>
+    </integer-array>
+
+    <!-- Array of desired screen brightness in nits corresponding to the lux values
+         in the config_autoBrightnessLevels array. As with config_screenBrightnessMinimumNits and
+         config_screenBrightnessMaximumNits, the display brightness is defined as the measured
+         brightness of an all-white image.
+
+         If this is defined then:
+            - config_autoBrightnessLcdBacklightValues should not be defined
+            - config_screenBrightnessNits must be defined
+            - config_screenBrightnessBacklight must be defined
+
+         This array should have size one greater than the size of the config_autoBrightnessLevels
+         array. The brightness values must be non-negative and non-decreasing. This must be
+         overridden in platform specific overlays -->
+    <integer-array name="config_autoBrightnessDisplayValuesNits">
+        <item>5</item>
+        <item>5</item>
+        <item>5</item>
+        <item>17</item>
+        <item>24</item>
+        <item>31</item>
+        <item>34</item>
+        <item>46</item>
+        <item>59</item>
+        <item>76</item>
+        <item>81</item>
+        <item>82</item>
+        <item>82</item>
+        <item>82</item>
+        <item>83</item>
+        <item>83</item>
+        <item>83</item>
+        <item>84</item>
+        <item>84</item>
+        <item>85</item>
+        <item>85</item>
+        <item>85</item>
+        <item>85</item>
+        <item>86</item>
+        <item>86</item>
+        <item>87</item>
+        <item>89</item>
+        <item>90</item>
+        <item>91</item>
+        <item>93</item>
+        <item>94</item>
+        <item>96</item>
+        <item>97</item>
+        <item>99</item>
+        <item>100</item>
+        <item>101</item>
+        <item>104</item>
+        <item>105</item>
+        <item>106</item>
+        <item>108</item>
+        <item>109</item>
+        <item>111</item>
+        <item>112</item>
+        <item>114</item>
+        <item>116</item>
+        <item>137</item>
+        <item>157</item>
+        <item>180</item>
+        <item>205</item>
+        <item>226</item>
+        <item>257</item>
+        <item>280</item>
+        <item>295</item>
+        <item>369</item>
+        <item>434</item>
+        <item>500</item>
+        <item>500</item>
+        <item>500</item>
+    </integer-array>
+
+    <!-- An array describing the screen's backlight values corresponding to the brightness
+         values in the config_screenBrightnessNits array.
+
+         This array should be equal in size to config_screenBrightnessBacklight. -->
+    <integer-array name="config_screenBrightnessBacklight">
+        <item>2</item>
+        <item>3</item>
+        <item>10</item>
+        <item>15</item>
+        <item>30</item>
+        <item>45</item>
+        <item>60</item>
+        <item>75</item>
+        <item>90</item>
+        <item>105</item>
+        <item>120</item>
+        <item>135</item>
+        <item>150</item>
+        <item>165</item>
+        <item>180</item>
+        <item>195</item>
+        <item>210</item>
+        <item>225</item>
+        <item>240</item>
+        <item>255</item>
+    </integer-array>
+
+    <!-- An array of floats describing the screen brightness in nits corresponding to the backlight
+         values in the config_screenBrightnessBacklight array.  On OLED displays these  values
+         should be measured with an all white image while the display is in the fully on state.
+         Note that this value should *not* reflect the maximum brightness value for any high
+         brightness modes but only the maximum brightness value obtainable in a sustainable manner.
+
+         This array should be equal in size to config_screenBrightnessBacklight -->
+    <integer-array name="config_screenBrightnessNits">
+        <item>2</item>
+        <item>4</item>
+        <item>22</item>
+        <item>30</item>
+        <item>68</item>
+        <item>95</item>
+        <item>133</item>
+        <item>165</item>
+        <item>192</item>
+        <item>218</item>
+        <item>255</item>
+        <item>290</item>
+        <item>326</item>
+        <item>352</item>
+        <item>384</item>
+        <item>399</item>
+        <item>422</item>
+        <item>432</item>
+        <item>442</item>
+        <item>455</item>
+    </integer-array>
+
+    <!-- Stability requirements in milliseconds for accepting a new brightness level.  This is used
+         for debouncing the light sensor.  Different constants are used to debounce the light sensor
+         when adapting to brighter or darker environments.  This parameter controls how quickly
+         brightness changes occur in response to an observed change in light level that exceeds the
+         hysteresis threshold. -->
+    <integer name="config_autoBrightnessBrighteningLightDebounce">1000</integer>
+    <integer name="config_autoBrightnessDarkeningLightDebounce">1000</integer>
+</resources>