Re: [PATCH 1/2] dt-bindings: thermal: loongson,ls2k-thermal: Fix binding check issues

[Conor Dooley <conor@kernel.org>]

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On Wed, Nov 01, 2023 at 07:38:39AM +0600, Binbin Zhou wrote:
> On Tue, Oct 31, 2023 at 10:58 PM Conor Dooley <conor@kernel.org> wrote:
> >
> > On Tue, Oct 31, 2023 at 07:05:49PM +0800, Binbin Zhou wrote:
> > > Add the missing 'thermal-sensor-cells' property which is required for
> > > every thermal sensor as it's used when using phandles.
> > > And add the thermal-sensor.yaml reference.
> > >
> > > Fixes: 72684d99a854 ("thermal: dt-bindings: add loongson-2 thermal")
> > > Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
> > > ---
> > >  .../bindings/thermal/loongson,ls2k-thermal.yaml        | 10 +++++++++-
> > >  1 file changed, 9 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/Documentation/devicetree/bindings/thermal/loongson,ls2k-thermal.yaml b/Documentation/devicetree/bindings/thermal/loongson,ls2k-thermal.yaml
> > > index 7538469997f9..b634f57cd011 100644
> > > --- a/Documentation/devicetree/bindings/thermal/loongson,ls2k-thermal.yaml
> > > +++ b/Documentation/devicetree/bindings/thermal/loongson,ls2k-thermal.yaml
> > > @@ -10,6 +10,9 @@ maintainers:
> > >    - zhanghongchen <zhanghongchen@loongson.cn>
> > >    - Yinbo Zhu <zhuyinbo@loongson.cn>
> > >
> > > +allOf:
> > > +  - $ref: /schemas/thermal/thermal-sensor.yaml#
> > > +
> > >  properties:
> > >    compatible:
> > >      oneOf:
> > > @@ -26,12 +29,16 @@ properties:
> > >    interrupts:
> > >      maxItems: 1
> > >
> > > +  '#thermal-sensor-cells':
> > > +    const: 1
> > > +
> > >  required:
> > >    - compatible
> > >    - reg
> > >    - interrupts
> > > +  - '#thermal-sensor-cells'
> >
> > Why does it need to be a required property now though?
> > Adding new required properties is technically an ABI break.
> 
> Hi Conor:
> 
> I don't think it makes sense to have a separate thermal sensor
> definition, it needs thermal-zones to describe specific behaviors,
> e.g. cpu-thermal, so we need '#thermal-sensor-cells' to specify the
> reference.
> And the Loongson-2K1000 has 4 sets of control registers, we need to
> specify the id when referencing it.

Unfortunately, none of this is an answer to my question.

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