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/imx/lights/fsl_lights.c
static int set_light_backlight(


static int lights_device_open(
        property_get("hw.backlight.dev", value, DEF_BACKLIGHT_DEV);


./frameworks/base/services/java/com/android/server/power/PowerManagerService.java
            mScreenBrightnessSettingMinimum = pm.getMinimumScreenBrightnessSetting();

./frameworks/base/core/java/android/os/PowerManager.java
    public int getMinimumScreenBrightnessSetting(
                com.android.internal.R.integer.config_screenBrightnessSettingMinimum);



./frameworks/base/core/res/res/values/config.xml
    <!-- Minimum screen brightness setting allowed by the power manager.
         The user is forbidden from setting the brightness below this level. -->
    <integer name="config_screenBrightnessSettingMinimum">10</integer>


./device/fsl/sabresd_6dq/overlay/frameworks/base/core/res/res/values/config.xml