linux-kernel - Re: [PATCH v5 1/2] dt-bindings: backlight: Add Texas Instruments LM3509

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Date: Mon, 1 Apr 2024 08:03:47 -0500
From: Rob Herring <robh@...nel.org>
To: Patrick Gansterer <paroga@...oga.com>
Cc: dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fbdev@...r.kernel.org, Lee Jones <lee@...nel.org>,
	Daniel Thompson <daniel.thompson@...aro.org>,
	Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@....cz>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Helge Deller <deller@....de>,
	Sam Ravnborg <sam@...nborg.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v5 1/2] dt-bindings: backlight: Add Texas Instruments
 LM3509

On Sat, Mar 30, 2024 at 03:59:24PM +0100, Patrick Gansterer wrote:
> Add Device Tree bindings for Texas Instruments LM3509 - a
> High Efficiency Boost for White LED's and/or OLED Displays
> 
> Signed-off-by: Patrick Gansterer <paroga@...oga.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
> ---
>  .../bindings/leds/backlight/ti,lm3509.yaml    | 139 ++++++++++++++++++
>  1 file changed, 139 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
> new file mode 100644
> index 000000000000..b67f67648852
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
> @@ -0,0 +1,139 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/backlight/ti,lm3509.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI LM3509 High Efficiency Boost for White LED's and/or OLED Displays
> +
> +maintainers:
> +  - Patrick Gansterer <paroga@...oga.com>
> +
> +description:
> +  The LM3509 current mode boost converter offers two separate outputs.
> +  https://www.ti.com/product/LM3509
> +
> +properties:
> +  compatible:
> +    const: ti,lm3509
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  reset-gpios:
> +    maxItems: 1
> +
> +  ti,brightness-rate-of-change-us:
> +    description: Brightness Rate of Change in microseconds.
> +    enum: [51, 13000, 26000, 52000]
> +
> +  ti,oled-mode:
> +    description: Enable OLED mode.
> +    type: boolean
> +
> +patternProperties:
> +  "^led@[01]$":
> +    type: object
> +    description: Properties for a string of connected LEDs.
> +
> +    allOf:

You don't need allOf here.

> +      - $ref: common.yaml#
> +
> +    properties:
> +      reg:
> +        description:
> +          The control register that is used to program the two current sinks.
> +          The LM3509 has two registers (BMAIN and BSUB) and are represented
> +          as 0 or 1 in this property. The two current sinks can be controlled
> +          independently with both registers, or register BMAIN can be
> +          configured to control both sinks with the led-sources property.
> +        minimum: 0
> +        maximum: 1
> +
> +      label: true
> +
> +      led-sources:
> +        allOf:

Or here.

> +          - minItems: 1
> +            maxItems: 2
> +            items:
> +              minimum: 0
> +              maximum: 1