linux-kernel - Re: [PATCH next v7 2/2] dt-bindings: i2c: add entry for hisilicon,i2c-ascend910

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Date:   Fri, 28 Oct 2022 19:45:46 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Weilong Chen <chenweilong@...wei.com>, yangyicong@...ilicon.com,
        xuwei5@...wei.com, wsa@...nel.org, robh+dt@...nel.org,
        robh@...nel.org
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH next v7 2/2] dt-bindings: i2c: add entry for
 hisilicon,i2c-ascend910

On 20/10/2022 23:56, Weilong Chen wrote:
> Add the new compatible for HiSilicon i2c.
> 
> Signed-off-by: Weilong Chen <chenweilong@...wei.com>
> ---
> Change since v6:
> - Rename to hisilicon,i2c-ascend910.yaml
> - Change all IIC to I2C
> - Add maintainer name
> Link: https://lore.kernel.org/lkml/7520818b-de40-7f2a-1b03-b1dcd29a2023@huawei.com/T/#ma89d78cef45e7ac6f2c6251ed958e8658e5c1eb5
> 

Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC.  It might happen, that command when run on an older
kernel, gives you outdated entries.  Therefore please be sure you base
your patches on recent Linux kernel.


>  .../bindings/i2c/hisilicon,i2c-ascend910.yaml | 70 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/hisilicon,i2c-ascend910.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i2c/hisilicon,i2c-ascend910.yaml b/Documentation/devicetree/bindings/i2c/hisilicon,i2c-ascend910.yaml
> new file mode 100644
> index 000000000000..f4f532d69670
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/hisilicon,i2c-ascend910.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/i2c/hisilicon,i2c-xxx.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"

Drop quotes

> +
> +title: HiSilicon common I2C controller Device Tree Bindings

Drop "Device Tree bindings"

> +
> +maintainers:
> +  - Yicong Yang <yangyicong@...ilicon.com>
> +
> +allOf:
> +  - $ref: /schemas/i2c/i2c-controller.yaml#
> +
> +properties:
> +  compatible:
> +    const: hisilicon,i2c-ascend910
> +    description:
> +      The HiSilicon common I2C controller can be used for many different
> +      types of SoC such as Huawei Ascend AI series chips.

Description goes to top level description.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-frequency:
> +    default: 400000
> +
> +  i2c-sda-falling-time-ns:
> +    default: 343
> +
> +  i2c-scl-falling-time-ns:
> +    default: 203
> +
> +  i2c-sda-hold-time-ns:
> +    default: 830
> +
> +  i2c-scl-rising-time-ns:
> +    default: 365
> +
> +  i2c-digital-filter-width-ns:
> +    default: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    i2c@...8b0000 {
> +      compatible = "hisilicon,i2c-ascend910";
> +      reg = <0x38b0000 0x10000>;
> +      interrupts = <0x0 120 0x4>;

Use defines for constants.

Best regards,
Krzysztof