Re: [PATCH 08/17] dts: include documentation for the RISC-V interrupt controllers

[Wesley Terpstra]

I've reread the relevant sections now, and you are correct. We should
remove the address-cells from the PLIC's dts.

On Wed, Jun 7, 2017 at 12:57 PM, Rob Herring <robh+dt@xxxxxxxxxx> wrote:
> On Wed, Jun 7, 2017 at 1:57 PM, Wesley Terpstra <wesley@xxxxxxxxxx> wrote:
>> On Wed, Jun 7, 2017 at 3:13 AM, Mark Rutland <mark.rutland@xxxxxxx> wrote:
>>>> > +RISC-V Hart-Level Interrupt Controller (HLIC)
>>>> > +---------------------------------------------
>
> [...]
>
>>>> > +       plic: interrupt-controller@c000000 {
>>>> > +               #address-cells = <0>;
>>>
>>> This can go, given you don't have sub-nodes, nor a #size-cells property.
>>
>> The device-tree-specification seems to indicate that this is mandatory
>> for an interrupt-controller. Or have I understood this wrongly? When
>> you use interrupts-extended, doesn't it use the address-cells of the
>> interrupt controller? We should add that size-cells = 0, though.
>
> It's only needed if you have an interrupt-map property AIUI.
> #size-cells should never be needed (unless you have child nodes of
> this one).
>
> Rob