linux-kernel - Re: [PATCH v2 1/2] dt-bindings: leds: add binding for aw200xx

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Message-ID: <8c3a16f6-f1fb-911b-b935-31ed8e227f8f@linaro.org>
Date:   Thu, 2 Mar 2023 08:48:26 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Martin Kurbanov <mmkurbanov@...rdevices.ru>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lee Jones <lee@...nel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...rdevices.ru
Subject: Re: [PATCH v2 1/2] dt-bindings: leds: add binding for aw200xx

On 28/02/2023 22:10, Martin Kurbanov wrote:
> Add YAML devicetree binding for AWINIC AW20036/AW20052/AW20074
> led driver.
> 
> Signed-off-by: Martin Kurbanov <mmkurbanov@...rdevices.ru>
> ---
>  .../bindings/leds/awinic,aw200xx.yaml         | 126 ++++++++++++++++++
>  1 file changed, 126 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/awinic,aw200xx.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/awinic,aw200xx.yaml b/Documentation/devicetree/bindings/leds/awinic,aw200xx.yaml
> new file mode 100644
> index 000000000000..08181703e223
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/awinic,aw200xx.yaml
> @@ -0,0 +1,126 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/awinic,aw200xx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AWINIC AW200XX LED
> +
> +maintainers:
> +  - Martin Kurbanov <mmkurbanov@...rdevices.ru>
> +
> +description: |
> +  This controller is present on AW20036/AW20054/AW20072.
> +  It is a 3x12/6x9/6x12 matrix LED programmed via
> +  an I2C interface, up to 36/54/72 LEDs or 12/18/24 RGBs,
> +  3 pattern controllers for auto breathing or group dimming control.
> +
> +  For more product information please see the link below:
> +  aw20036 - https://www.awinic.com/Public/Uploads/uploadfile/files/20200509/20200509151532_5eb65894d205a.pdf
> +  aw20054 - https://www.awinic.com/Public/Uploads/uploadfile/files/20200509/20200509151602_5eb658b2b77cb.pdf
> +  aw20072 - https://www.awinic.com/Public/Uploads/uploadfile/files/20200509/20200509151754_5eb659227a145.pdf

Links do not work. Error 401

> +
> +properties:
> +  compatible:
> +    enum:
> +      - awinic,aw20036
> +      - awinic,aw20054
> +      - awinic,aw20072
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  awinic,display-rows:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      Leds matrix size

Why do you need this property? Number of LEDs are known from the number
of children. Matrix size is fixed in compatible, isn't it?

> +
> +patternProperties:
> +  "^led@[0-9a-f]$":
> +    type: object
> +    $ref: common.yaml#
> +    unevaluatedProperties: false
> +
> +    properties:
> +      reg:
> +        description:
> +          LED number
> +        maxItems: 1
> +
> +      led-max-microamp:
> +        default: 9780
> +        description: |
> +          Note that a driver will take the minimum of all LED limits
> +          since the chip has a single global setting.
> +          The maximum output current of each LED is calculated by the
> +          following formula:
> +            IMAXled = 160000 * (592 / 600.5) * (1 / display-rows)
> +          And the minimum output current formula:
> +            IMINled = 3300 * (592 / 600.5) * (1 / display-rows)
> +


Best regards,
Krzysztof