linux-kernel - Re: [PATCH v5] dt-bindings: gpio: aspeed,ast2400-gpio: Convert to DT schema

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Message-ID: <f69ef2ad-8ace-40c8-b923-4dde20eda2ec@linaro.org>
Date: Tue, 27 Feb 2024 08:06:20 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Andrew Jeffery <andrew@...econstruct.com.au>, linus.walleij@...aro.org,
 brgl@...ev.pl, krzysztof.kozlowski+dt@...aro.org
Cc: robh+dt@...nel.org, conor+dt@...nel.org, joel@....id.au,
 linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] dt-bindings: gpio: aspeed,ast2400-gpio: Convert to DT
 schema

On 27/02/2024 06:23, Andrew Jeffery wrote:
> Squash warnings such as:
> 
> ```
> arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-galaxy100.dtb: /ahb/apb@...00000/gpio@...80000: failed to match any schema with compatible: ['aspeed,ast2400-gpio']
> ```
> 
> Signed-off-by: Andrew Jeffery <andrew@...econstruct.com.au>
> ---
> v5: Resolve macro definition clashes from aspeed clock headers in examples
>     identified by Rob's bot:
> 
>     https://lore.kernel.org/all/170900020204.2360855.790404478830111761.robh@kernel.org/
> 
>     Clearly I missed running `make dt_binding_check` on the final iteration of
>     the v4 patch I sent. Hopefully I'm running out of rakes to step on here!
> 
> v4: https://lore.kernel.org/all/20240227004414.841391-1-andrew@codeconstruct.com.au/
> 
>     Add constraints for gpio-line-names, ngpios as requested by Krzysztof:
>     https://lore.kernel.org/all/458becdb-fb1e-4808-87b6-3037ec945647@linaro.org/
> 
>     Add more examples to exercise constraints.

No, one or two examples (if there are quite different) is enough.

> 
> v3: https://lore.kernel.org/all/20240226051645.414935-1-andrew@codeconstruct.com.au/
> 
>     Base on v6.8-rc6, fix yamllint warning
> 
>     Rob's bot picked the missing `#interrupt-cells` in the example on v2[1]. The
>     patch was based on v6.8-rc1, and going back over my shell history I missed
>     the following output from `make dt_binding_check`:
> 
>     ```
>     ...
>       LINT    Documentation/devicetree/bindings
>       usage: yamllint [-h] [-] [-c CONFIG_FILE | -d CONFIG_DATA] [--list-files] [-f {parsable,standard,colored,github,auto}] [-s] [--no-warnings] [-v] [FILE_OR_DIR ...]
>       yamllint: error: one of the arguments FILE_OR_DIR - is required   
>     ...
>     ```
> 
>     I've rebased on v6.8-rc6 and no-longer see the issue with the invocation
>     of `yamllint`.
> 
> [1]: https://lore.kernel.org/all/170892197611.2260479.15343562563553959436.robh@kernel.org/
> 
> v2: https://lore.kernel.org/all/20240226031951.284847-1-andrew@codeconstruct.com.au/
> 
>     Address feedback from Krzysztof:
>     https://lore.kernel.org/all/0d1dd262-b6dd-4d71-9239-8b0aec8cceff@linaro.org/
> 
> v1: https://lore.kernel.org/all/20240220052918.742793-1-andrew@codeconstruct.com.au/
> 
>  .../bindings/gpio/aspeed,ast2400-gpio.yaml    | 143 ++++++++++++++++++
>  .../devicetree/bindings/gpio/gpio-aspeed.txt  |  39 -----
>  2 files changed, 143 insertions(+), 39 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml
>  delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-aspeed.txt
> 
> diff --git a/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml b/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml
> new file mode 100644
> index 000000000000..1aa28b1817cf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml
> @@ -0,0 +1,143 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/aspeed,ast2400-gpio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Aspeed GPIO controller
> +
> +maintainers:
> +  - Andrew Jeffery <andrew@...econstruct.com.au>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - aspeed,ast2400-gpio
> +      - aspeed,ast2500-gpio
> +      - aspeed,ast2600-gpio
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +    description: The clock to use for debounce timings
> +
> +  gpio-controller: true
> +  gpio-line-names: true

min/maxItems


> +  gpio-ranges: true
> +
> +  "#gpio-cells":
> +    const: 2
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interrupt-controller: true
> +
> +  "#interrupt-cells":
> +    const: 2
> +
> +  ngpios: true

minimum/maximum.


> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - interrupt-controller
> +  - "#interrupt-cells"
> +  - gpio-controller
> +  - "#gpio-cells"
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: aspeed,ast2400-gpio
> +    then:
> +      properties:
> +        gpio-line-names:
> +          minItems: 220
> +          maxItems: 220
> +        ngpios:
> +          const: 220
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: aspeed,ast2500-gpio
> +    then:
> +      properties:
> +        gpio-line-names:
> +          minItems: 232
> +          maxItems: 232
> +        ngpios:
> +          const: 232
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: aspeed,ast2600-gpio
> +    then:
> +      properties:
> +        gpio-line-names:
> +          minItems: 36
> +          maxItems: 208
> +        ngpios:
> +          enum: [ 36, 208 ]
> +      required:
> +        - ngpios
Best regards,
Krzysztof