linux-kernel - Re: [PATCH v3 2/6] dt-binding: phy: Add iMX8MP PCIe PHY binding

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Date:   Mon, 22 Aug 2022 13:07:13 -0500
From:   Rob Herring <robh@...nel.org>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     p.zabel@...gutronix.de, l.stach@...gutronix.de,
        bhelgaas@...gle.com, lorenzo.pieralisi@....com,
        shawnguo@...nel.org, vkoul@...nel.org,
        alexander.stein@...tq-group.com, marex@...x.de,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        linux-imx@....com
Subject: Re: [PATCH v3 2/6] dt-binding: phy: Add iMX8MP PCIe PHY binding

On Thu, Aug 18, 2022 at 03:02:29PM +0800, Richard Zhu wrote:
> Add i.MX8MP PCIe PHY binding.

Explain the differences in h/w. The phy is connected to PERST#?

> 
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> ---
>  .../bindings/phy/fsl,imx8-pcie-phy.yaml          | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> index b6421eedece3..692783c7fd69 100644
> --- a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> @@ -16,6 +16,7 @@ properties:
>    compatible:
>      enum:
>        - fsl,imx8mm-pcie-phy
> +      - fsl,imx8mp-pcie-phy
>  
>    reg:
>      maxItems: 1
> @@ -28,11 +29,16 @@ properties:
>        - const: ref
>  
>    resets:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 2
>  
>    reset-names:
> -    items:
> -      - const: pciephy
> +    oneOf:
> +      - items:          # for iMX8MM
> +          - const: pciephy
> +      - items:          # for IMX8MP
> +          - const: pciephy
> +          - const: perst

This does the same thing:

minItems: 1
items:
  - const: pciephy
  - const: perst


>  
>    fsl,refclk-pad-mode:
>      description: |
> @@ -60,6 +66,10 @@ properties:
>      description: A boolean property indicating the CLKREQ# signal is
>        not supported in the board design (optional)
>  
> +  power-domains:
> +    description: PCIe PHY  power domain (optional).
> +    maxItems: 1
> +
>  required:
>    - "#phy-cells"
>    - compatible
> -- 
> 2.25.1
> 
>