linux-kernel - Re: [PATCH v7 1/2] dt-bindings: leds: backlight: Add Kinetic KTZ8866 backlight

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Message-ID: <a9c47e2f-aacb-4c8f-3a0b-67274ef15376@linaro.org>
Date:   Fri, 20 Jan 2023 11:18:56 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jianhua Lu <lujianhua000@...il.com>, Lee Jones <lee@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@....cz>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Helge Deller <deller@....de>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-fbdev@...r.kernel.org
Subject: Re: [PATCH v7 1/2] dt-bindings: leds: backlight: Add Kinetic KTZ8866
 backlight

On 20/01/2023 10:47, Jianhua Lu wrote:
> Add Kinetic KTZ8866 backlight binding documentation.
> 
> Signed-off-by: Jianhua Lu <lujianhua000@...il.com>
> ---
> Changes in v2:
>   - Remove "items" between "compatible" and "const: kinetic,ktz8866".
>   - Change "additionalProperties" to "unevaluatedProperties".
> 
> Changes in v3:
>   - Add Krzysztof's R-b.
> 
> Changes in v4:
>   - Drop Krzysztof's R-b.
>   - Add some new properties.
> 
> Changes in v5:
>   - Add missing enum under property description.
>   - Rename uncorrect properties.
> 
> Changes in v6:
>   - Correct wrong property suffix and description.
> 
> Changes in v7:
>   - Add vddpos and vddeg supply.
>   - Use enable-gpios instead of defining enable pin.
> 
>  .../leds/backlight/kinetic,ktz8866.yaml       | 74 +++++++++++++++++++
>  1 file changed, 74 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml
> new file mode 100644
> index 000000000000..b1d0ade0dfb6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml
> @@ -0,0 +1,74 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Kinetic Technologies KTZ8866 backlight
> +
> +maintainers:
> +  - Jianhua Lu <lujianhua000@...il.com>
> +
> +description: |
> +  The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
> +  led backlight with dual lcd bias power.
> +  https://www.kinet-ic.com/ktz8866/
> +
> +allOf:
> +  - $ref: common.yaml#
> +
> +properties:
> +  compatible:
> +    const: kinetic,ktz8866
> +
> +  vddpos-supply:
> +    description: positive boost supply regulator.
> +
> +  vddneg-supply:
> +    description: negative boost supply regulator.
> +
> +  enable-gpios:
> +    description: GPIO to use to enable/disable the backlight (HWEN pin).
> +    maxItems: 1
> +
> +  current-num-sinks:
> +    description: number of the LED current sinks' channels.
> +    enum: [1, 2, 3, 4, 5, 6]
> +
> +  current-ramping-time-ms:
> +    description: LED current ramping time in milliseconds.
> +    enum: [2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]

kinetic,current-ramp-delay-ms

> +
> +  led-ramping-time-ms:

kinetic,led-enable-ramp-delay-ms

So both are similar to existing regulator properties.

Best regards,
Krzysztof