Add new script.bin

mount /dev/mmcblk0p1 /projects/mnt
cd /projects/mnt

git clone https://github.com/linux-sunxi/sunxi-tools

cd sunxi-tools 

make

cd .. 

sunxi-tools/bin2fex ./script.bin ./script.fex

[uart_para3]
uart_used = 1
uart_port = 3
uart_type = 2
uart_tx = port:PG06<4><1><default><default>
uart_rx = port:PG07<4><1><default><default>

sunxi-tools/fex2bin ./script.fex ./script_changed.bin

Testen mit:

dmesg | grep uart

[    0.624293] [uart]: used uart info.: 0xc9
[    0.629014] [uart]: serial probe 0 irq 33 mapbase 0x01c28000
[    0.655253] sunxi-uart.0: ttyS0 at MMIO 0x1c28000 (irq = 33) is a U6_16550A
[    1.395339] [uart]: serial probe 3 irq 36 mapbase 0x01c28c00
[    1.427200] sunxi-uart.3: ttyS1 at MMIO 0x1c28c00 (irq = 36) is a U6_16550A
[    1.439012] [uart]: serial probe 6 irq 51 mapbase 0x01c29800
[    1.470806] sunxi-uart.6: ttyS2 at MMIO 0x1c29800 (irq = 51) is a U6_16550A
[    1.482628] [uart]: serial probe 7 irq 52 mapbase 0x01c29c00
[    1.514441] sunxi-uart.7: ttyS3 at MMIO 0x1c29c00 (irq = 52) is a U6_16550A

Entnommen aus:

http://linux-sunxi.org/Fex_Guide#.5Buart_para1.5D

http://linux-sunxi.org/A20/PIO 
port:<port><mux feature><pullup/down><drive capability><output level>