linux-kernel - Re: [PATCH 1/2] dt-bindings: phy: intel: Add documentation for Keem Bay eMMC PHY

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Message-ID: <20200330202321.GA9386@bogus>
Date:   Mon, 30 Mar 2020 14:23:21 -0600
From:   Rob Herring <robh@...nel.org>
To:     Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@...el.com>
Cc:     kishon@...com, mark.rutland@....com, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: phy: intel: Add documentation for Keem
 Bay eMMC PHY

On Mon, Mar 16, 2020 at 06:37:25PM +0800, Wan Ahmad Zainie wrote:
> Document Intel Keem Bay eMMC PHY DT bindings.
> 
> Signed-off-by: Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@...el.com>
> ---
>  .../bindings/phy/intel,keembay-emmc-phy.yaml  | 57 +++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/intel,keembay-emmc-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/intel,keembay-emmc-phy.yaml b/Documentation/devicetree/bindings/phy/intel,keembay-emmc-phy.yaml
> new file mode 100644
> index 000000000000..af1d62fc8323
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/intel,keembay-emmc-phy.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: GPL-2.0-only

Dual license new bindings:

(GPL-2.0-only OR BSD-2-Clause)

> +# Copyright 2020 Intel Corporation
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/phy/intel,keembay-emmc-phy.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Intel Keem Bay eMMC PHY
> +
> +maintainers:
> +  - Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@...el.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - intel,keembay-emmc-phy
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: emmcclk
> +
> +  intel,syscon:
> +    $ref: '/schemas/types.yaml#/definitions/phandle'

Make this binding  a child of the syscon and get rid of this.

> +    description:
> +      A phandle to a syscon device used to access core/phy configuration
> +      registers.
> +
> +  "#phy-cells":
> +    const: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - intel,syscon
> +  - "#phy-cells"
> +
> +examples:
> +  - |
> +    mmc_phy_syscon: syscon@...90000 {
> +          compatible = "simple-mfd", "syscon";
> +          reg = <0x0 0x20290000 0x0 0x54>;
> +    };
> +
> +    emmc_phy: mmc_phy@...90000 {

phy@...

> +          compatible = "intel,keembay-emmc-phy";
> +          reg = <0x0 0x20290000 0x0 0x54>;

Here you have overlapping register regions. Don't do that.

Given they are the same size, why do you need the syscon at all?

> +          clocks = <&mmc>;
> +          clock-names = "emmcclk";
> +          intel,syscon = <&mmc_phy_syscon>;
> +          #phy-cells = <0>;
> +    };
> -- 
> 2.17.1
>