On Mon, Oct 6, 2014 at 6:03 PM,  <shu....@vensi.com> wrote:
>
> Hi,
>
> Our board uses arago project on it. The kernel is 3.12 and in the directory
> /sys/devices/, there is no capemgr.* . Therefore, I am not able to use the
> device tree overlays (.dtbo).
>
> We want to change the pinmux on the P8 and P9 header and also turn the
> internal pull up resistor of the UART0_RX on. Therefore, we need to modify
> the current beaglebone black .dtb file.
>
> My question are as follows:
>
> 1. Can I just replace the current am335x-boneblack.dtb with the new .dtb
> file to make the pinmux changes? Or do i need to load the new .dtb file up
> and how?
>
> 2. I see that there are a lot of .dtb in the /boot/ folder. How to load
> different .dtb when board boots up?

Depending on your "bootloader" specify:

dtb=file.dtb

but you might have an "old" u-boot so use the older "fdtfile"
fdtfile=file.dtb

in /boot/uEnv.txt

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/

-- 
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