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Message-ID: <33f04b06-dc00-b7ce-6a24-2282608b40dc@linaro.org>
Date:   Wed, 26 Oct 2022 10:03:51 -0400
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Subject: Re: [PATCH v5 1/2] dt-bindings: mtd: marvell-nand: Convert to YAML DT
 scheme
To:     Vadym Kochan <vadym.kochan@plvision.eu>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andrew Lunn <andrew@lunn.ch>,
        Gregory Clement <gregory.clement@bootlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
        linux-mtd@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc:     Elad Nachman <enachman@marvell.com>,
        Chris Packham <chris.packham@alliedtelesis.co.nz>
References: <20221026134545.7146-1-vadym.kochan@plvision.eu>
 <20221026134545.7146-2-vadym.kochan@plvision.eu>
Content-Language: en-US
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20221026134545.7146-2-vadym.kochan@plvision.eu>
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Precedence: bulk

On 26/10/2022 09:45, Vadym Kochan wrote:
> Switch the DT binding to a YAML schema to enable the DT validation.
> 
> Dropped deprecated compatibles and properties described in txt file.
> 
> Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
> ---
> 
> v5:
>    1) Get back "label" and "partitions" properties but without
>       ref to the "partition.yaml" which was wrongly used.
> 
>    2) Add "additionalProperties: false" for nand@ because all possible
>       properties are described.
> 
> v4:
>    1) Remove "label" and "partitions" properties
> 
>    2) Use 2 clocks for A7K/8K platform which is a requirement
> 
> v3:
>   1) Remove txt version from the MAINTAINERS list
> 
>   2) Use enum for some of compatible strings
> 
>   3) Drop:
>         #address-cells
>         #size-cells:
> 
>      as they are inherited from the nand-controller.yaml
> 
>   4) Add restriction to use 2 clocks for A8K SoC
> 
>   5) Dropped description for clock-names and extend it with 
>      minItems: 1
> 
>   6) Drop description for "dmas"
> 
>   7) Use "unevalautedProperties: false"
> 
>   8) Drop quites from yaml refs.
> 
>   9) Use 4-space indentation for the example section
> 
> v2:
>   1) Fixed warning by yamllint with incorrect indentation for compatible list
> 
>  .../bindings/mtd/marvell,nand-controller.yaml | 195 ++++++++++++++++++
>  .../devicetree/bindings/mtd/marvell-nand.txt  | 126 -----------
>  MAINTAINERS                                   |   1 -
>  3 files changed, 195 insertions(+), 127 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
>  delete mode 100644 Documentation/devicetree/bindings/mtd/marvell-nand.txt
> 
> diff --git a/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml b/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
> new file mode 100644
> index 000000000000..544e98ed12bb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
> @@ -0,0 +1,195 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/marvell,nand-controller.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell NAND Flash Controller (NFC)
> +
> +maintainers:
> +  - Miquel Raynal <miquel.raynal@bootlin.com>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - const: marvell,armada-8k-nand-controller
> +          - const: marvell,armada370-nand-controller
> +      - enum:
> +          - marvell,armada370-nand-controller
> +          - marvell,pxa3xx-nand-controller
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:

What happened to maxItems here? This is wrong. You keep changing random
things, again. V3 was correct.


> +    description:
> +      Shall reference the NAND controller clocks, the second one is
> +      is only needed for the Armada 7K/8K SoCs
> +
> +  clock-names:
> +    items:
> +      - const: core
> +      - const: reg
> +
> +  dmas:
> +    maxItems: 1
> +
> +  dma-names:
> +    items:
> +      - const: rxtx
> +
> +  marvell,system-controller:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: Syscon node that handles NAND controller related registers
> +
> +patternProperties:
> +  "^nand@[0-3]$":
> +    type: object
> +    properties:
> +      reg:
> +        minimum: 0
> +        maximum: 3
> +
> +      nand-rb:
> +        minimum: 0
> +        maximum: 1
> +
> +      nand-ecc-strength:
> +        enum: [1, 4, 8]
> +
> +      nand-on-flash-bbt: true
> +
> +      nand-ecc-mode: true
> +
> +      nand-ecc-algo:
> +        description: |
> +          This property is essentially useful when not using hardware ECC.
> +          Howerver, it may be added when using hardware ECC for clarification
> +          but will be ignored by the driver because ECC mode is chosen depending
> +          on the page size and the strength required by the NAND chip.
> +          This value may be overwritten with nand-ecc-strength property.
> +
> +      nand-ecc-step-size:
> +        description: |
> +          Marvell's NAND flash controller does use fixed strength
> +          (1-bit for Hamming, 16-bit for BCH), so the actual step size
> +          will shrink or grow in order to fit the required strength.
> +          Step sizes are not completely random for all and follow certain
> +          patterns described in AN-379, "Marvell SoC NFC ECC".
> +
> +      label:
> +        $ref: /schemas/types.yaml#/definitions/string
> +
> +      partitions:
> +        type: object

That's not what I asked for. Like four times I asked you to add here
unevaluatedProperties: false and I never said that ref to partition.yaml
should be removed and you... instead remove that ref.

You need to define here children and specify their ref.

You must use unevaluatedProperties: false here. So this is fifth time I
am writing this feedback.


> +
> +      marvell,nand-keep-config:
> +        description: |
> +          Orders the driver not to take the timings from the core and
> +          leaving them completely untouched. Bootloader timings will then
> +          be used.
> +        $ref: /schemas/types.yaml#/definitions/flag
> +
> +      marvell,nand-enable-arbiter:
> +        description: |
> +          To enable the arbiter, all boards blindly used it,
> +          this bit was set by the bootloader for many boards and even if
> +          it is marked reserved in several datasheets, it might be needed to set
> +          it (otherwise it is harmless) so whether or not this property is set,
> +          the bit is selected by the driver.
> +        $ref: /schemas/types.yaml#/definitions/flag
> +        deprecated: true
> +
> +    additionalProperties: false
> +
> +    required:
> +      - reg
> +      - nand-rb
> +
> +unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +
> +allOf:
> +  - $ref: nand-controller.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: marvell,pxa3xx-nand-controller
> +    then:
> +      required:
> +        - dmas
> +        - dma-names
> +    else:
> +      properties:
> +        dmas: false
> +        dma-names: false
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: marvell,armada-8k-nand-controller
> +    then:
> +      required:
> +        - marvell,system-controller
> +      properties:
> +        clocks:
> +          minItems: 2
> +          maxItems: 2

This does not make sense now...

Best regards,
Krzysztof