linux-kernel - Re: [PATCH v2 1/3] dt-bindings: PCI: imx6: convert the imx pcie controller to dtschema

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Date:   Tue, 19 Jul 2022 13:00:25 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     robh@...nel.org, l.stach@...gutronix.de, galak@...nel.crashing.org,
        shawnguo@...nel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, kernel@...gutronix.de
Subject: Re: [PATCH v2 1/3] dt-bindings: PCI: imx6: convert the imx pcie
 controller to dtschema

On Fri, Aug 27, 2021 at 02:42:58PM +0800, Richard Zhu wrote:
> Convert the fsl,imx6q-pcie.txt into a schema.
> - ranges property should be grouped by region, with no functional
>   changes.
> - only one propert is allowed in the compatible string, remove
>   "snps,dw-pcie".
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> ---
>  .../bindings/pci/fsl,imx6q-pcie.txt           | 100 ---------
>  .../bindings/pci/fsl,imx6q-pcie.yaml          | 202 ++++++++++++++++++
>  MAINTAINERS                                   |   2 +-
>  3 files changed, 203 insertions(+), 101 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
>  create mode 100644 Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt

> -Optional properties:
> -- fsl,tx-deemph-gen1: Gen1 De-emphasis value. Default: 0
> -- fsl,tx-deemph-gen2-3p5db: Gen2 (3.5db) De-emphasis value. Default: 0

> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml

> +  fsl,tx-deemph-gen1:
> +    description: Gen1 De-emphasis value (optional required).
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    default: 0
> +
> +  fsl,tx-deemph-gen2-3p5db:
> +    description: Gen2 (3.5db) De-emphasis value (optional required).
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    default: 0

What does "optional required" mean in all these properties?
"Optional" is the opposite of "required."