[email protected] writes:

> In the BBB System Reference Manual the P8 and P9 pinouts are
> documented with 7 modes for each pin which provide different uses for
> the pins.
>
> All of the actual software and descriptions I can find about the BBB
> hardware just talk about the Device Tree and Device Tree overlays.  I
> have already (sort) begun to understand the Device Tree system and I
> have actually done a (trivial) recompile of the Device Tree to change
> one of the I2C clock frequencies.
>
> Do the modes in the manual have any relevance at all now?  I.e. can I
> actually start the system in a specified mode?  Or are they just
> history, or what?
>
If you are writing a device tree you will need to refer to the pin modes
to configure the pinmux.

Cheers,

- Ben

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