Problem with load more dtb file in uEnv.txt ? active ttyO* on 3.14 ubuntu..

Hi all.
I can use all UARTs with debian 3.8 .
use slots to active and then use them .

but in ubuntu ,this make me crazy…
after i tired one week…

I come for healp. ;(

Ubuntu 3.14.33-ti-r50
I want to use UART1 UART2 UART4
After i tied 999 times.
I find i can add this to uEnv.txt to active one UART.

dtb=am335x-boneblack-ttyO2.dtb

Anyone can help me to load 4 of them?

dtb=am335x-boneblack-ttyO1.dtb,am335x-boneblack-ttyO2.dtb is wrong.

dtb=am335x-boneblack-ttyO1.dtb

dtb=am335x-boneblack-ttyO2.dtb

this still no use…

Hi all.
I can use all UARTs with debian 3.8 .
use slots to active and then use them .

but in ubuntu ,this make me crazy...
after i tired one week..
I come for healp. ;(

No need to wait a week...

First, reset dtb:

dtb=am335x-boneblack.dtb

Ubuntu 3.14.33-ti-r50

Next upgrade:

sudo apt-get update ; sudo apt-get install linux-image-3.14.37-ti-r57
; sudo reboot

I want to use UART1 UART2 UART4
After i tied 999 times.
I find i can add this to uEnv.txt to active one UART.
dtb=am335x-boneblack-ttyO2.dtb

Anyone can help me to load 4 of them?
dtb=am335x-boneblack-ttyO1.dtb,am335x-boneblack-ttyO2.dtb is wrong.

dtb=am335x-boneblack-ttyO1.dtb
dtb=am335x-boneblack-ttyO2.dtb

You can only load one "dtb"...

Next, download dtb-rebuilder on your bbb:

git clone -b 3.14-ti https://github.com/RobertCNelson/dtb-rebuilder.git
cd dtb-rebuilder/

nano ./src/arm/am335x-boneblack.dts

scroll down to:

/* uart1: P9.24, P9.26 */
#include "am335x-ttyO1.dtsi"
/* #include "am335x-bone-ttyO1.dtsi" */
/* uart2: P9.21, P9.22 */
#include "am335x-ttyO2.dtsi"
/* #include "am335x-bone-ttyO2.dtsi" */
/* uart4: P9.11, P9.13 */
#include "am335x-ttyO4.dtsi"
/* #include "am335x-bone-ttyO4.dtsi" */

Change to:

/* uart1: P9.24, P9.26 */
#include "am335x-ttyO1.dtsi"
#include "am335x-bone-ttyO1.dtsi"
/* uart2: P9.21, P9.22 */
#include "am335x-ttyO2.dtsi"
#include "am335x-bone-ttyO2.dtsi"
/* uart4: P9.11, P9.13 */
#include "am335x-ttyO4.dtsi"
#include "am335x-bone-ttyO4.dtsi"

save/exit.

Run:

make
sudo make install

sudo reboot