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Re: RaspberryPi 4 GPIO
On Tuesday, 24 December 2024 at 13:03, Greg Troxel <gdt%lexort.com@localhost> wrote:
> >
> > Could you tell us more about your setup which works.
> >
> > You are using UEFI booting? Do you know what version?
> > ...
>
>
> No, I am using the bootcode which comes with the "build.sh release".
>
> > And you mention you are building from sources. Is that using
> > the GENERIC64 kernel config?
>
>
> build.sh release, and yes GENERIC64.
>
Same kernel. Different boot setup.
Since he GPIO fails to be configured before the root filesystem
is mounted I am thinking it is maybe the UEFI not exposing the
GPIO to the OS.
I notice that if in the UEFI menus I enable a fan plugged onto
the GPIO header then acpifan0 is configured on boot and works
as expected.
Thanks for your help btw. Happy Christmas if you observe it.
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