linux-kernel - Re: [PATCH] dt-bindings: spi: Convert Freescale DSPI to json schema

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Message-ID: <20210315205440.lb6hcrvzxtqxdb5x@skbuf>
Date:   Mon, 15 Mar 2021 22:54:40 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Kuldeep Singh <kuldeep.singh@....com>
Cc:     linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH] dt-bindings: spi: Convert Freescale DSPI to json schema

Hi Kuldeep,

On Mon, Mar 15, 2021 at 05:45:18PM +0530, Kuldeep Singh wrote:
> Convert the Freescale DSPI binding to DT schema format using json-schema.
> 
> Signed-off-by: Kuldeep Singh <kuldeep.singh@....com>
> ---
> Hi Rob,
> This patch is checked with following commands with no warnings observed.
> make distclean; make allmodconfig;
> make dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml;
> make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
> 
>  .../bindings/spi/fsl,spi-fsl-dspi.yaml        | 131 ++++++++++++++++++
>  .../devicetree/bindings/spi/spi-fsl-dspi.txt  |  65 ---------
>  MAINTAINERS                                   |   2 +-
>  3 files changed, 132 insertions(+), 66 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
>  delete mode 100644 Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
> 
> diff --git a/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml b/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
> new file mode 100644
> index 000000000000..15ffc83bdba6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
> @@ -0,0 +1,131 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/fsl,spi-fsl-dspi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale DSPI Controller
> +
> +maintainers:
> +  - Vladimir Oltean <olteanv@...il.com>
> +
> +allOf:
> +  - $ref: "spi-controller.yaml#"
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - fsl,vf610-dspi
> +          - fsl,ls1021a-v1.0-dspi
> +          - fsl,ls1028a-dspi
> +          - fsl,ls2085a-dspi
> +          - fsl,lx2160a-dspi
> +      - items:
> +          - enum:
> +              - fsl,ls1012a-dspi
> +              - fsl,ls1028a-dspi
> +              - fsl,ls1043a-dspi
> +              - fsl,ls1046a-dspi
> +              - fsl,ls1088a-dspi
> +          - const: fsl,ls1021a-v1.0-dspi
> +      - items:
> +          - enum:
> +              - fsl,ls2080a-dspi
> +              - fsl,lx2160a-dspi
> +          - const: fsl,ls2085a-dspi

Can this simply be:
  compatible:
    oneOf:
      - enum:
          - fsl,vf610-dspi
          - fsl,ls1021a-v1.0-dspi
          - fsl,ls1012a-dspi
          - fsl,ls1028a-dspi
          - fsl,ls1043a-dspi
          - fsl,ls1046a-dspi
          - fsl,ls1088a-dspi
          - fsl,ls2080a-dspi
          - fsl,ls2085a-dspi
          - fsl,lx2160a-dspi
?

> +examples:
> +  - |
> +    #include <dt-bindings/clock/fsl,qoriq-clockgen.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        spi@...0000 {
> +            compatible = "fsl,ls1028a-dspi", "fsl,ls1021a-v1.0-dspi";

This doesn't need the "fsl,ls1021a-v1.0-dspi" compatible, can you please
remove it?

> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            reg = <0x0 0x2100000 0x0 0x10000>;
> +            interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> +            clock-names = "dspi";
> +            clocks = <&clockgen QORIQ_CLK_PLATFORM_PLL QORIQ_CLK_PLL_DIV(2)>;
> +            dmas = <&edma0 0 62>, <&edma0 0 60>;
> +            dma-names = "tx", "rx";
> +            spi-num-chipselects = <4>;
> +            little-endian;
> +
> +            flash@0 {
> +                compatible = "jedec,spi-nor";
> +                spi-max-frequency = <10000000>;
> +                reg = <0>;
> +            };
> +        };
> +    };

(...)

> -Optional property:
> -- big-endian: If present the dspi device's registers are implemented
> -  in big endian mode.

I don't see "big-endian" being covered in any common yaml, could you
please not delete it? The driver calls of_device_is_big_endian.