On Sun, Jan 12, 2020 at 10:49:30PM -0600, Samuel Holland wrote:
> The Allwinner H3 SoC contains an R_INTC that is, as far as we know,
> compatible with the R_INTC present in other sun8i/sun50i SoCs starting
> with the A31. Since the R_INTC hardware is undocumented, introduce a new
> compatible for the R_INTC variant in this SoC, in case there turns out
> to be some difference.
>
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
>  .../interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml       | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml
> index 0eccf5551786..fffffcd0eea3 100644
> --- a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml
> +++ b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml
> @@ -29,6 +29,9 @@ properties:
>        - items:
>          - const: allwinner,sun8i-a83t-r-intc
>          - const: allwinner,sun6i-a31-r-intc
> +      - items:
> +        - const: allwinner,sun8i-h3-r-intc
> +        - const: allwinner,sun6i-a31-r-intc

If we are to add more compatibles, I guess we could switch to
something like:

items:
  - enum:
    - allwinner,sun8i-a83t-r-intc
    - allwinner,sun8i-h3-r-intc
  - const: allwinner,sun6i-a31-r-intc

It's going to be easier to maintain in the long run.

Thanks!
Maxime