CONFIG_OF_OVERLAY (not configurable)

modulename: overlay.ko

and/or

overlay.dtb.ko

configname: CONFIG_OF_OVERLAY

Linux Kernel Configuration
└─>Device Drivers
└─>Device Tree and Open Firmware support
└─>OF_OVERLAY
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/of/overlay.c
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depends
CONFIG_OF
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is depended by
CONFIG_DRM_RCAR_LVDS
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