enable OVERLAY_FS
@@ -9,7 +9,7 @@ diff -rupN old/linux-xlnx-xilinx-v2016.4/arch/arm/configs/xilinx_zynq_defconfig
CONFIG_MDIO_BITBANG=y
CONFIG_INPUT_SPARSEKMAP=y
CONFIG_INPUT_EVDEV=y
-@@ -239,3 +240,126 @@ CONFIG_RCU_CPU_STALL_TIMEOUT=60
+@@ -239,3 +240,127 @@ CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_FONTS=y
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
@@ -136,6 +136,7 @@ diff -rupN old/linux-xlnx-xilinx-v2016.4/arch/arm/configs/xilinx_zynq_defconfig
+CONFIG_FB_TFT_FBTFT_DEVICE=y
+CONFIG_USB_ACM=y
+CONFIG_USB_TMC=y
++CONFIG_OVERLAY_FS=y
diff -rupN old/linux-xlnx-xilinx-v2016.4/drivers/iio/adc/xilinx-xadc-core.c linux-xlnx-xilinx-v2016.4/drivers/iio/adc/xilinx-xadc-core.c
--- old/linux-xlnx-xilinx-v2016.4/drivers/iio/adc/xilinx-xadc-core.c
+++ linux-xlnx-xilinx-v2016.4/drivers/iio/adc/xilinx-xadc-core.c
