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SubjectRe: [PATCH v6 2/7] dt-bindings: thermal: add YAML schema for sun8i-thermal driver bindings
Hi,

On Wed, Nov 27, 2019 at 06:44:34PM +0100, Maxime Ripard wrote:
> Hi,
>
> On Tue, Nov 26, 2019 at 09:29:30PM -0800, Vasily Khoruzhick wrote:
> > From: Yangtao Li <tiny.windzz@gmail.com>
> >
> > sun8i-thermal driver supports thermal sensor in wide range of Allwinner
> > SoCs. Add YAML schema for its bindings.
> >
> > Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
> > Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
> > ---
> > .../thermal/allwinner,sun8i-a83t-ths.yaml | 103 ++++++++++++++++++
> > 1 file changed, 103 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml b/Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml
> > new file mode 100644
> > index 000000000000..e622f0a4be90
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml
> > @@ -0,0 +1,103 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/thermal/allwinner,sun8i-a83t-ths.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Allwinner SUN8I Thermal Controller Device Tree Bindings
> > +
> > +maintainers:
> > + - Yangtao Li <tiny.windzz@gmail.com>
> > +
> > +properties:
> > + compatible:
> > + oneOf:
> > + - const: allwinner,sun8i-a83t-ths
> > + - const: allwinner,sun8i-h3-ths
> > + - const: allwinner,sun8i-r40-ths
> > + - const: allwinner,sun50i-a64-ths
> > + - const: allwinner,sun50i-h5-ths
> > + - const: allwinner,sun50i-h6-ths
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + maxItems: 1
> > +
> > + resets:
> > + maxItems: 1
> > +
> > + clocks:
> > + minItems: 1
> > + maxItems: 2
> > +
> > + clock-names:
> > + anyOf:
> > + - items:
> > + - const: bus
> > + - const: mod
> > + - items:
> > + - const: bus
>
> This can be:
>
> clock-names:
> minItems: 1

Additionally, minItems should be 0, since A83T doesn't have bus clock/reset. And
then there should be a special case for A83T too with min/maxItems = 0 for both
resets and clocks.

regards,
o.

> maxItems: 2
> items:
> - const: bus
> - const: mod
>
> And the length should be checked based on the compatible value, with
> something like
>
> if:
> properties:
> compatible:
> contains:
> const: allwinner,sun50i-h6-ths
>
> then:
> properties:
> clocks:
> maxItems: 1
>
> clock-names:
> maxItems: 1
>
> else:
> properties:
> clocks:
> maxItems: 2
>
> clock-names:
> maxItems: 2
>
> > +
> > + '#thermal-sensor-cells':
> > + enum: [ 0, 1 ]
> > + description: |
> > + Definition depends on soc version:
> > +
> > + For "allwinner,sun8i-h3-ths",
> > + value must be 0.
> > + For all other compatibles
> > + value must be 1.
>
> This should be checked using an if as well.
>
> > +
> > + nvmem-cells:
> > + maxItems: 1
> > + items:
> > + - description: Calibration data for thermal sensors
>
> You can drop the items and just move the description up one level,
> under nvmem-cells
>
> > +
> > + nvmem-cell-names:
> > + items:
> > + - const: calibration
>
> Ditto for the const
>
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - '#thermal-sensor-cells'
>
> Whether clocks, clock-names and resets are thereshould be check using
> an if statement as well.
>
> > +
> > +examples:
> > + - |
> > + ths_a83t: ths@1f04000 {
>
> You don't need the label at all, and the node name should be
> temperature-sensor according to the DT spec, not ths. This applies to
> all you examples.
>
> > + compatible = "allwinner,sun8i-a83t-ths";
> > + reg = <0x01f04000 0x100>;
> > + interrupts = <0 31 0>;
> > + nvmem-cells = <&ths_calibration>;
> > + nvmem-cell-names = "calibration";
> > + #thermal-sensor-cells = <1>;
> > + };
>
> New line.
>
> Thanks!
> Maxime


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