I have project for Atheros AR9341 and Atheros LSDK 9.2.0-11.14

Use Atheros F/W at AR9341 is working fine !

I want use OpenWRT at AR9341 , and porting driver (wifi , ethernet , art.ko) from LSDK 9.2.0-11.14 to OpenWRT

Atheros Kernel is 2.6.31 , OpenWRT is 3.3.8

I compiler driver fail

I want use kernel 2.6 for OpenWRT(Attitude Adjustment (12.09 final))

How do I downgrade kernel version ?

Thx