linux-kernel - Re: [PATCH v3 3/5] dt-bindings: interrupt-controller: loongson,liointc: Fix dtbs

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Message-ID: <CAMpQs4+fz7Xx90QnU23kRAtcyaq9nFQAfp7Qa1RxWhpKr_TiHw@mail.gmail.com>
Date:   Wed, 1 Nov 2023 08:05:46 +0600
From:   Binbin Zhou <zhoubb.aaron@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Binbin Zhou <zhoubinbin@...ngson.cn>,
        Huacai Chen <chenhuacai@...ngson.cn>,
        Thomas Gleixner <tglx@...utronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        loongson-kernel@...ts.loongnix.cn, devicetree@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-mips@...r.kernel.org, lvjianmin@...ngson.cn,
        WANG Xuerui <git@...0n.name>, loongarch@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/5] dt-bindings: interrupt-controller:
 loongson,liointc: Fix dtbs_check for interrupt-names

On Tue, Oct 31, 2023 at 11:53 PM Rob Herring <robh@...nel.org> wrote:
>
> On Tue, Oct 31, 2023 at 10:36:38AM +0800, Binbin Zhou wrote:
> > The Loongson-2K0500/2K1000 CPUs have 64 interrupt sources as inputs, and
> > a route-mapped node handles up to 32 interrupt sources, so two liointc
> > nodes are defined in dts{i}.
> > Of course, we need to ensure that the routing outputs (intx) of the two
> > nodes cannot conflict.
> >
> > For example, in Loongson-2K1000, 'int0' is typically used by the liointc0
> > node, then the liointc1 node can only use the outputs starting with
> > 'int1'.
> >
> > So "interrupt-names" should be defined by "pattern".
> >
> > This fixes dtbs_check warning:
> >
> > DTC_CHK arch/loongarch/boot/dts/loongson-2k0500-ref.dtb
> > arch/loongarch/boot/dts/loongson-2k0500-ref.dtb: interrupt-controller@...11440: interrupt-names:0: 'int0' was expected
> >         From schema: Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> > arch/loongarch/boot/dts/loongson-2k0500-ref.dtb: interrupt-controller@...11440: Unevaluated properties are not allowed ('interrupt-names' was unexpected)
> >         From schema: Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> > DTC_CHK arch/loongarch/boot/dts/loongson-2k1000-ref.dtb
> > arch/loongarch/boot/dts/loongson-2k1000-ref.dtb: interrupt-controller@...01440: interrupt-names:0: 'int0' was expected
> >         From schema: Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> > arch/loongarch/boot/dts/loongson-2k1000-ref.dtb: interrupt-controller@...01440: Unevaluated properties are not allowed ('interrupt-names' was unexpected)
> >         From schema: Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> >
> > Signed-off-by: Binbin Zhou <zhoubinbin@...ngson.cn>
> > ---
> >  .../bindings/interrupt-controller/loongson,liointc.yaml    | 7 +++----
> >  1 file changed, 3 insertions(+), 4 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml b/Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> > index 7393d7dfbe82..a90c609d351e 100644
> > --- a/Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> > +++ b/Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml
> > @@ -54,11 +54,9 @@ properties:
> >    interrupt-names:
> >      description: List of names for the parent interrupts.
> >      items:
> > -      - const: int0
> > -      - const: int1
> > -      - const: int2
> > -      - const: int3
> > +      pattern: int[0-3]
> >      minItems: 1
> > +    maxItems: 4
> >
> >    '#interrupt-cells':
> >      const: 2
> > @@ -87,6 +85,7 @@ required:
> >    - compatible
> >    - reg
> >    - interrupts
> > +  - interrupt-names
>
> A new required property is an ABI break. Is that okay for this platform?
> The commit msg should answer that if so.

Hi Rob:

Thanks for your reply.

In fact, 'interrupt-names' is essential for both liointc-1.0 and
liointc-2.0, and we now pass it to get the corresponding interrupt
number.
To a certain extent, I think it's already 'required'.
Of course, I'll try to explain it more clearly in the commit message.

Thanks.
Binbin
>
>
> >    - interrupt-controller
> >    - '#interrupt-cells'
> >    - loongson,parent-int-map
> > --
> > 2.39.3
> >