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

Rob Herring
2022-09-13T12:22:13Z

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@huawei.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@huawei.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@5038B0000{

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
>
>