update readme

README.md

@@ -58,6 +58,48 @@ Here's how you can flash the firmware on uConsole(A06 or CM4) or a PC running Ub
 * [4G expansion Schematic](https://github.com/clockworkpi/uConsole/blob/master/clockwork_UC_4G_Schematic.pdf)
 
 
+## Gearbox 
+
+### A06 
+Gearbox is a script tool used to adjust the big.LITTLE architecture of the A06 chip.  
+you can get it by running 
+```
+sudo apt update 
+sudo apt install -y devterm-gearbox-a06
+```
+
+In latest os image of A06, default Gearbox is set to use 4 LITTLE core with 816Mhz,GPU at 400Mhz
+
+you can run `a06-gearbox` to see the current core status.
+
+```
+Current Status:
++-----------------------------------+-----------------+-----------+
+|            Cortex-A53             |   Cortex-A72    | Mali-T860 |
++--------+--------+--------+--------+--------+--------+-----------+
+| CPU 0  | CPU 1  | CPU 2  | CPU 3  | CPU 4  | CPU 5  |    GPU    |
++--------+--------+--------+--------+--------+--------+-----------+
+| 816Mhz | 816Mhz | 816Mhz | 816Mhz |  OFF   |  OFF   |   400MHz  |
++--------+--------+--------+--------+--------+--------+-----------+
+CPU Governor: schedutil    GPU Governor: simple_ondemand
+```
+
+Run `sudo a06-gearbox -s [GEAR]` to set gear,GEAR would be 1,2,3,4,5,6
+
+There are 6 gears in gearbox
+
+```
+               1 for simple writing tasks with long battery life.
+               2 for browsing most websites with long battery life.
+               3 for most 2D games and emulators.
+               4 for playing videos and 3D games.
+               5 for performance-first tasks.
+               6 for max performance, max power (usage).
+
+```
+
+
+
 ## Community
 Please visit our [Github Wiki](https://github.com/clockworkpi/uConsole/wiki) and https://forum.clockworkpi.com for more information.