I think there is a conflict you can see in the dts files for
"exclusive-use", P9.26.
Not sure, but I think this will cause the IO error message.
The dts files are in /opt/source/bb.org-overlays/src/arm.
cape-universaln:
"P9.26",
BB-UART1:
exclusive-use =
"P9.24", // uart1_txd
"P9.26", // uart1_rxd
> 0: PF---- -1
> 1: PF---- -1
> 2: PF---- -1
> 3: PF---- -1
> 4: P-O-L- 0 Override Board Name,00A0,Override Manuf,cape-universaln
>
> The instructions only show entries 0 to 3. I type:
>
> sh -c "echo 'BB-UART1' > /sys/devices/platform/bone_capemgr/slots"
>
> and I get:
>
> sh: echo: I/O error
>
> Can you tell me what I am doing wrong?
>
> Thanks.
>
>
>
>
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