linux-kernel - Re: [PATCH next v4 2/2] dt-bindings: i2c: add entry for hisilicon,hisi-i2c

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Message-ID: <20220913122203.GA3413501-robh@kernel.org>
Date:   Tue, 13 Sep 2022 07:22:03 -0500
From:   Rob Herring <robh@...nel.org>
To:     Weilong Chen <chenweilong@...wei.com>
Cc:     yangyicong@...ilicon.com, xuwei5@...wei.com, wsa@...nel.org,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH next v4 2/2] dt-bindings: i2c: add entry for
 hisilicon,hisi-i2c

On Fri, Sep 09, 2022 at 03:48:42PM +0800, Weilong Chen wrote:
> Add the new compatible for HiSilicon common i2c.
> 
> Signed-off-by: Weilong Chen <chenweilong@...wei.com>
> ---
>  .../bindings/i2c/hisilicon,hisi-i2c.yaml      | 67 +++++++++++++++++++
>  1 file changed, 67 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/hisilicon,hisi-i2c.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i2c/hisilicon,hisi-i2c.yaml b/Documentation/devicetree/bindings/i2c/hisilicon,hisi-i2c.yaml
> new file mode 100644
> index 000000000000..f1cb6a4c70d1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/hisilicon,hisi-i2c.yaml
> @@ -0,0 +1,67 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/i2c/hisilicon,hisi-i2c.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: HiSilicon common IIC controller Device Tree Bindings
> +
> +maintainers:
> +  - yangyicong@...wei.com
> +
> +allOf:
> +  - $ref: /schemas/i2c/i2c-controller.yaml#
> +
> +properties:
> +  compatible:
> +    const: hisilicon,hisi-i2c

You need SoC specific compatibles.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clk_rate:
> +    default: 0xEE6B280

What is this property for? Use the clock binding.

> +
> +  clock-frequency:
> +    default: 400000
> +
> +  i2c-sda-falling-time-ns:
> +    default: 343
> +
> +  i2c-scl-falling-time-ns:
> +    default: 203
> +
> +  i2c-sda-hold-time-ns:
> +    default: 0x33E

The rest are in decimal. Be consistent.

> +
> +  i2c-scl-rising-time-ns:
> +    default: 365
> +
> +  i2c-digital-filter-width-ns:
> +    default: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    i2c1: i2c@...8B0000{

Space needed              ^

Use lowercase hex.

Drop unused labels.
  
> +      compatible = "hisilicon,hisi-i2c";
> +      reg = <0x38B0000 0x10000>;
> +      interrupts = <0x0 120 0x4>;
> +      i2c-sda-falling-time-ns = <56>;
> +      i2c-scl-falling-time-ns = <56>;
> +      i2c-sda-hold-time-ns = <56>;
> +      i2c-scl-rising-time-ns = <56>;
> +      i2c-digital-filter;
> +      i2c-digital-filter-width-ns = <0x0>;
> +      clk_rate = <0x0 0xEE6B280>;
> +      clock-frequency = <400000>;
> +    };
> -- 
> 2.31.GIT
> 
>