[PATCH 0/2] arm: socfpga: arria10: allow to reprogram FPGA with warm reboot

[Michał Barnaś]

On Thu, Feb 29, 2024 at 2:03 PM Dinh Nguyen <dinguyen at kernel.org> wrote:
>
>
>
> On 2/22/24 09:20, Michał Barnaś wrote:
> >
> > By default, the board requires power cycle (cold boot) to program the
> > FPGA with bitstream. This change adds Kconfig that allows to enable
> > reprogramming the FPGA with every boot. This makes the update process
> > of the bitstream on the filesystem to be applied with simple system
> > reboot.
> >
> >
>
> If we want to enable the reprogramming on every boot, would it make
> sense to just do it and not even bother with the Kconfig option?
>
> Dinh

The FPGA programming part takes quite a long time, so it increases the
reboot time significantly.
I don't think that everyone needs the reprogramming to happen every
time. We need that
because our boards are closed in the lab and the power is not easily
accessible, so in case of
update to the bitstream, we should be able to remotely update it with
a pure warm reboot.
So I thought that this should be set by Kconfig to not bother other users with
longer reboot times.

Michał