linux-kernel - Re: [PATCH v8 1/2] dt-bindings: phy: intel-emmc-phy: Add YAML schema for LGM eMMC PHY

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Date:   Fri, 13 Dec 2019 13:08:19 -0600
From:   Rob Herring <robh@...nel.org>
To:     "Ramuthevar,Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        kishon@...com, andriy.shevchenko@...el.com,
        cheol.yong.kim@...el.com, qi-ming.wu@...el.com,
        peter.harliman.liem@...el.com
Subject: Re: [PATCH v8 1/2] dt-bindings: phy: intel-emmc-phy: Add YAML schema
 for LGM eMMC PHY

On Thu, Dec 12, 2019 at 09:53:19AM +0800, Ramuthevar,Vadivel MuruganX wrote:
> From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
> 
> Add a YAML schema to use the host controller driver with the
> eMMC PHY on Intel's Lightning Mountain SoC.
> 
> Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
> ---
>  .../bindings/phy/intel,lgm-emmc-phy.yaml           | 62 ++++++++++++++++++++++
>  1 file changed, 62 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml b/Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml
> new file mode 100644
> index 000000000000..aed11258d96d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml
> @@ -0,0 +1,62 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/intel,lgm-emmc-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Intel Lightning Mountain(LGM) eMMC PHY Device Tree Bindings
> +
> +maintainers:
> +  - Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
> +
> +description: |+
> +  Bindings for eMMC PHY on Intel's Lightning Mountain SoC, syscon
> +  node is used to reference the base address of eMMC phy registers.
> +
> +  The eMMC PHY node should be the child of a syscon node with the
> +  required property:
> +
> +  - compatible:         Should be one of the following:
> +                        "intel,lgm-syscon", "syscon"
> +  - reg:
> +      maxItems: 1
> +
> +properties:
> +  compatible:
> +    contains:

You need to drop 'contains'. That implies other strings can also be 
present.

> +      const: intel,lgm-emmc-phy
> +
> +  "#phy-cells":
> +    const: 0
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    maxItems: 1

Drop maxItems. It should be:

const: emmcclk

Or just drop clock-names because you don't really need *-names when 
there is only 1.

> +
> +required:
> +  - "#phy-cells"
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +
> +examples:
> +  - |
> +    sysconf: chiptop@...00000 {
> +      compatible = "intel,lgm-syscon", "syscon";
> +      reg = <0xe0200000 0x100>;
> +
> +      emmc-phy: emmc-phy@a8 {
> +        compatible = "intel,lgm-emmc-phy";
> +        reg = <0x00a8 0x10>;
> +        clocks = <&emmc>;
> +        clock-names = "emmcclk";
> +        #phy-cells = <0>;
> +      };
> +    };
> +...
> -- 
> 2.11.0
>