How to Release GPS Occupancy to UART4 of iMX6 UART4

iMX6 Android system can support VK1613 GPS module by UART4 that it could not be used as a general purpose serial, here we'll introduce how to release the occupancy.

Here we will take OKMX6Q-C for demonstration

1. Delete the definition in init.rc

diff --git a/device/fsl/sabresd_6dq/init.rc b/device/fsl/sabresd_6dq/init.rc

index 8be2c838c9..ce674ae330 100755

--- a/device/fsl/sabresd_6dq/init.rc

+++ b/device/fsl/sabresd_6dq/init.rc

@@ -23,7 +23,7 @@ on boot

     symlink /dev/mxs_viim /dev/mxc_mem

     # Set GPS serial and reset GPIO pin

-    setprop /dev/ttymxc3

+    #setprop /dev/ttymxc3

     #setprop /dev/athrnmea

     #setprop persist.gps.oacmode @f

     #symlink /dev/ttymxc3 /dev/gpsdevice

2. Disable GPS related compiling operation

mv hardware/imx/libgps-vk/ hardware/imx/libgps-vk/Android.txt

mv hardware/imx/libgps/ hardware/imx/libgps/Android.txt

3. Clear former compiled information

make clean

Recompile it(it may take some time, please be patient).