On Thu, Jul 13, 2017 at 12:09 PM,  <[email protected]> wrote:
> I'm was having the same problem,
>
>> P9_26 pinmux file not found!
>> bash: /sys/devices/platform/ocp/ocp*P9_26_pinmux/state: No such file or
>> directory
>> Cannot write pinmux file: /sys/devices/platform/ocp/ocp*P9_26_pinmux/state
>
>
>
> re-flashed the latest debian image yesterday and started working fine again.
> Today after an apt-get upgrade it failed again.
> Something got broke?

the listed latest is just too old.. Grab the Jessie Monthy snapshot flasher:

https://rcn-ee.net/rootfs/bb.org/testing/2017-07-01/

debian@beaglebone:~$ config-pin P9_26 gpio_pd
debian@beaglebone:~$ config-pin -q P9_26
P9_26 Mode: gpio_pd Direction: in Value: 0

* it uses u-boot overlays, docs are here:

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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