Subject: Re: [PATCH v3 07/11] dt-bindings: phy: convert MIP DSI PHY binding to YAML schema

From: Rob Herring <[email-masked]>
Date: Mon, 7 Dec 2020 15:19:20 -0600

On Wed, Nov 18, 2020 at 04:21:22PM +0800, Chunfeng Yun wrote:
> Convert MIPI DSI PHY binding to YAML schema mediatek,dsi-phy.yaml
> 
> Cc: Chun-Kuang Hu <[email-masked]>
> Signed-off-by: Chunfeng Yun <[email-masked]>
> ---
> v3: new patch
> ---
>  .../display/mediatek/mediatek,dsi.txt         | 18 +---
>  .../bindings/phy/mediatek,dsi-phy.yaml        | 83 +++++++++++++++++++
>  2 files changed, 84 insertions(+), 17 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/phy/mediatek,dsi-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> index f06f24d405a5..8238a86686be 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> @@ -22,23 +22,7 @@ Required properties:
>  MIPI TX Configuration Module
>  ============================
>  
> -The MIPI TX configuration module controls the MIPI D-PHY.
> -
> -Required properties:
> -- compatible: "mediatek,<chip>-mipi-tx"
> -- the supported chips are mt2701, 7623, mt8173 and mt8183.
> -- reg: Physical base address and length of the controller's registers
> -- clocks: PLL reference clock
> -- clock-output-names: name of the output clock line to the DSI encoder
> -- #clock-cells: must be <0>;
> -- #phy-cells: must be <0>.
> -
> -Optional properties:
> -- drive-strength-microamp: adjust driving current, should be 3000 ~ 6000. And
> -						   the step is 200.
> -- nvmem-cells: A phandle to the calibration data provided by a nvmem device. If
> -               unspecified default values shall be used.
> -- nvmem-cell-names: Should be "calibration-data"
> +See phy/mediatek,dsi-phy.yaml
>  
>  Example:
>  
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,dsi-phy.yaml b/Documentation/devicetree/bindings/phy/mediatek,dsi-phy.yaml
> new file mode 100644
> index 000000000000..87f8df251ab0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/mediatek,dsi-phy.yaml
> @@ -0,0 +1,83 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2020 MediaTek
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/mediatek,dsi-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek MIPI Display Serial Interface (DSI) PHY binding
> +
> +maintainers:
> +  - Chun-Kuang Hu <[email-masked]>
> +  - Chunfeng Yun <[email-masked]>
> +
> +description: The MIPI DSI PHY supports up to 4-lane output.
> +
> +properties:
> +  $nodename:
> +    pattern: "^dsi-phy@[0-9a-f]+$"
> +
> +  compatible:
> +    enum:
> +      - mediatek,mt2701-mipi-tx
> +      - mediatek,mt7623-mipi-tx
> +      - mediatek,mt8173-mipi-tx
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PLL reference clock
> +
> +  clock-output-names:
> +    maxItems: 1
> +
> +  "#phy-cells":
> +    const: 0
> +
> +  "#clock-cells":
> +    const: 0
> +
> +  nvmem-cells:
> +    maxItems: 1
> +    description: A phandle to the calibration data provided by a nvmem device,
> +      if unspecified, default values shall be used.
> +
> +  nvmem-cell-names:
> +    items:
> +      - const: calibration-data
> +
> +  drive-strength-microamp:
> +    description: adjust driving current, the step is 200.

multipleOf: 200

> +    $ref: /schemas/types.yaml#/definitions/uint32

Can drop. Standard unit suffixes have a type already.

> +    minimum: 2000
> +    maximum: 6000
> +    default: 4600
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-output-names
> +  - "#phy-cells"
> +  - "#clock-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8173-clk.h>
> +    dsi-phy@10215000 {
> +        compatible = "mediatek,mt8173-mipi-tx";
> +        reg = <0x10215000 0x1000>;
> +        clocks = <&clk26m>;
> +        clock-output-names = "mipi_tx0_pll";
> +        drive-strength-microamp = <4000>;
> +        nvmem-cells= <&mipi_tx_calibration>;
> +        nvmem-cell-names = "calibration-data";
> +        #clock-cells = <0>;
> +        #phy-cells = <0>;
> +    };
> +
> +...
> -- 
> 2.18.0
> 

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