Re: [PATCH v4 2/5] dt-bindings: clocks: atmel,at91rm9200-pmc: convert to yaml

[Conor Dooley <conor.dooley@microchip.com>]

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On Wed, May 17, 2023 at 08:48:04AM +0000, Claudiu.Beznea@microchip.com wrote:
> On 16.05.2023 15:58, Claudiu Beznea - M18063 wrote:
> > Hi, Conor,
> > 
> > On 16.05.2023 15:00, Conor Dooley wrote:
> >> Hey Claudiu,
> >>
> >> On Tue, May 16, 2023 at 08:18:33AM +0300, Claudiu Beznea wrote:
> >>> Convert Atmel PMC documentation to yaml. Along with it clock names
> >>> were adapted according to the current available device trees as
> >>> different controller versions accept different clock (some of them
> >>> have 3 clocks as input, some has 2 clocks as inputs and some with 2
> >>> input clocks uses different clock names).
> >>> diff --git a/Documentation/devicetree/bindings/clock/atmel,at91rm9200-pmc.yaml b/Documentation/devicetree/bindings/clock/atmel,at91rm9200-pmc.yaml
> >>> new file mode 100644
> >>> index 000000000000..e5f514bc4bf7
> >>> --- /dev/null
> >>> +++ b/Documentation/devicetree/bindings/clock/atmel,at91rm9200-pmc.yaml
> >>> @@ -0,0 +1,153 @@
> >>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> >>> +%YAML 1.2
> >>> +---
> >>> +$id: http://devicetree.org/schemas/clock/atmel,at91rm9200-pmc.yaml#
> >>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >>> +
> >>> +title: Atmel Power Management Controller (PMC)
> >>> +
> >>> +maintainers:
> >>> +  - Claudiu Beznea <claudiu.beznea@microchip.com>
> >>> +
> >>> +description:
> >>> +  The power management controller optimizes power consumption by controlling all
> >>> +  system and user peripheral clocks. The PMC enables/disables the clock inputs
> >>> +  to many of the peripherals and to the processor.
> >>> +
> >>> +properties:
> >>> +  compatible:
> >>> +    oneOf:
> >>> +      - items:
> >>> +          - const: atmel,at91sam9g20-pmc
> >>> +          - const: atmel,at91sam9260-pmc
> >>> +          - const: syscon
> >>> +      - items:
> >>> +          - enum:
> >>> +              - atmel,at91sam9g15-pmc
> >>> +              - atmel,at91sam9g25-pmc
> >>> +              - atmel,at91sam9g35-pmc
> >>> +              - atmel,at91sam9x25-pmc
> >>> +              - atmel,at91sam9x35-pmc
> >>> +          - const: atmel,at91sam9x5-pmc
> >> Yet another combinations question for you...
> >> With this binding the following is not possible:
> >>
> >> "atmel,at91sam9x5-pmc", "syscon"
> >>
> >> Is that intended?
> > 
> > No, I've just missed it. Same for the above. I'll have a new round and fix it.
> 
> Though... shouldn't this have been detected by make dtbs_check?

Only if there actually exists a dtb containing
compatible = "atmel,at91sam9x5-pmc", "syscon";
that is enabled by the config that you are building with.

From taking a quick look:
git grep "\"atmel,at91sam9x5-pmc\", \"syscon\""
arch/arm/boot/dts/at91sam9g15.dtsi:    compatible = "atmel,at91sam9g15-pmc", "atmel,at91sam9x5-pmc", "syscon";
arch/arm/boot/dts/at91sam9g25.dtsi:    compatible = "atmel,at91sam9g25-pmc", "atmel,at91sam9x5-pmc", "syscon";
arch/arm/boot/dts/at91sam9g35.dtsi:    compatible = "atmel,at91sam9g35-pmc", "atmel,at91sam9x5-pmc", "syscon";
arch/arm/boot/dts/at91sam9x25.dtsi:    compatible = "atmel,at91sam9x25-pmc", "atmel,at91sam9x5-pmc", "syscon";
arch/arm/boot/dts/at91sam9x35.dtsi:    compatible = "atmel,at91sam9x35-pmc", "atmel,at91sam9x5-pmc", "syscon";
arch/arm/boot/dts/at91sam9x5.dtsi:     compatible = "atmel,at91sam9x5-pmc", "syscon";

There's only actually one place where you have this combination & it
seems to get overridden by all of the more specific dtsi files that
include at91sam9x5.dtsi.

Hope that helps,
Conor.

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