[PATCH 3/8] dt-bindings: spi: Add Nuvoton WPCM450 Flash Interface Unit (FIU)

[Jonathan Neuschäfer]

On Mon, Nov 07, 2022 at 09:09:15AM +0100, Krzysztof Kozlowski wrote:
> On 06/11/2022 15:45, Jonathan Neuschäfer wrote:
> > On Sun, Nov 06, 2022 at 10:38:45AM +0100, Krzysztof Kozlowski wrote:
[...]
> >> This is rather obvious, so what you should comment is WHY or WHEN second
> >> resource can be omitted.
> > 
> > Ok, I'll add more reasoning, which is basically: The "memory" mapping is
> > only an optimization for faster access, knowledge of it is not necessary
> > for full operation of the device.
> > 
> >> Not every instance on the hardware has it?
> > 
> > AFAIK every instance has it, and there's unlikely to be any variation on
> > this fact anymore, because newer Nuvoton SoCs replaced the FIU with a
> > redesigned and incompatible version.
> > 
> > I admit that the value of making the "memory" mapping optional is rather
> > theoretical, and I'm open to making this reg item mandatory to simplify
> > the binding.
> 
> If every instance has it, then regardless whether it is actually used or
> not, just require second address?

Alright, I'll do that.

Thanks,
Jonathan
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