linux-kernel - Re: [PATCH v2 2/3] dt-bindings: backlight: add lm3630a bindings

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Message-ID: <20190401213926.GD14681@amd>
Date:   Mon, 1 Apr 2019 23:39:26 +0200
From:   Pavel Machek <pavel@....cz>
To:     Brian Masney <masneyb@...tation.org>
Cc:     lee.jones@...aro.org, daniel.thompson@...aro.org,
        jingoohan1@...il.com, robh+dt@...nel.org,
        jacek.anaszewski@...il.com, mark.rutland@....com,
        b.zolnierkie@...sung.com, dri-devel@...ts.freedesktop.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
        dmurphy@...com, jonathan@...ek.ca
Subject: Re: [PATCH v2 2/3] dt-bindings: backlight: add lm3630a bindings

On Mon 2019-04-01 06:30:33, Brian Masney wrote:
> Add new backlight bindings for the TI LM3630A dual-string white LED.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
> ---
>  .../leds/backlight/lm3630a-backlight.yaml     | 112
++++++++++++++++++

What is that? Is it future of all the bindings?

Up to device tree people, I guess, but...

								Pavel


>  1 file changed, 112 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
> new file mode 100644
> index 000000000000..42a8c59d237a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
> @@ -0,0 +1,112 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI LM3630A High-Efficiency Dual-String White LED
> +
> +maintainers:
> +  - Lee Jones <lee.jones@...aro.org>
> +  - Daniel Thompson <daniel.thompson@...aro.org>
> +  - Jingoo Han <jingoohan1@...il.com>
> +
> +description: |
> +  The LM3630A is a current-mode boost converter which supplies the power and
> +  controls the current in up to two strings of 10 LEDs per string.
> +  https://www.ti.com/product/LM3630A
> +
> +properties:
> +  compatible:
> +    const: ti,lm3630a
> +
> +  reg:
> +    maxItems: 1
> +
> +  ti,linear-mapping-mode:
> +    description: |
> +      Enable linear mapping mode. If disabled, then it will use exponential
> +      mapping mode in which the ramp up/down appears to have a more uniform
> +      tranisiton to the human eye.
> +    type: boolean
> +
> +required:
> +  - compatible
> +  - reg
> +
> +patternProperties:
> +  "^led*$":
> +    type: object
> +    description: |
> +      Properties for a string of connected LEDs.
> +
> +    properties:
> +      label:
> +        description: |
> +          The label for this LED. If omitted, the label is taken from the node
> +          name (excluding the unit address). It has to uniquely identify a
> +          device, i.e. no other LED class device can be assigned the same label.
> +
> +      led-sources:
> +        description: |
> +          List of device current outputs the LED is connected to.
> +        allOf:
> +          - $ref: /schemas/types.yaml#/definitions/uint32-array
> +          - minItems: 1
> +            maxItems: 2
> +            items:
> +              minimum: 0
> +              maximum: 1
> +
> +      default-brightness:
> +        description: Default brightness level on boot.
> +        minimum: 0
> +        maximum: 255
> +
> +      max-brightness:
> +        description: Maximum brightness level on boot.
> +        minimum: 0
> +        maximum: 255
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        lm3630a_bl@38 {
> +                compatible = "ti,lm3630a";
> +                status = "ok";
> +                reg = <0x38>;
> +
> +                led {
> +                        label = "main-lcd";
> +                        led-sources = <0 1>;
> +                        default-brightness = <200>;
> +                        max-brightness = <255>;
> +                };
> +        };
> +    };
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        lm3630a_bl@38 {
> +                compatible = "ti,lm3630a";
> +                status = "ok";
> +                reg = <0x38>;
> +
> +                led-bank-a {
> +                        led-sources = <0>;
> +                        default-brightness = <150>;
> +                        ti,linear-mapping-mode;
> +                };
> +
> +                led-bank-b {
> +                        led-sources = <1>;
> +                        default-brightness = <225>;
> +                        ti,linear-mapping-mode;
> +                };
> +        };
> +    };

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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