linux-kernel - Re: [PATCH v2 1/2] dt-bindings: leds: Add binding for sgm3140

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Message-ID: <20200410174142.GA14153@bogus>
Date:   Fri, 10 Apr 2020 12:41:42 -0500
From:   Rob Herring <robh@...nel.org>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     linux-leds@...r.kernel.org, Dan Murphy <dmurphy@...com>,
        Heiko Stuebner <heiko@...ech.de>,
        Icenowy Zheng <icenowy@...c.io>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Pavel Machek <pavel@....cz>, Shawn Guo <shawnguo@...nel.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v2 1/2] dt-bindings: leds: Add binding for sgm3140

On Mon, Mar 30, 2020 at 09:47:56PM +0200, Luca Weiss wrote:
> Add YAML devicetree binding for SGMICRO SGM3140 charge pump used for
> camera flash LEDs.
> 
> Signed-off-by: Luca Weiss <luca@...tu.xyz>
> ---
> Changes since v1:
> - Add vin-supply
> - Add led subnode (common.yaml)
> 
>  .../bindings/leds/leds-sgm3140.yaml           | 61 +++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/leds-sgm3140.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-sgm3140.yaml b/Documentation/devicetree/bindings/leds/leds-sgm3140.yaml
> new file mode 100644
> index 000000000000..24ca178e5d0a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-sgm3140.yaml
> @@ -0,0 +1,61 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/leds-sgm3140.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SGMICRO SGM3140 500mA Buck/Boost Charge Pump LED Driver
> +
> +maintainers:
> +  - Luca Weiss <luca@...tu.xyz>
> +
> +description: |
> +  The SGM3140 is a current-regulated charge pump which can regulate two current
> +  levels for Flash and Torch modes.
> +
> +  The data sheet can be found at:
> +    http://www.sg-micro.com/uploads/soft/20190626/1561535688.pdf
> +
> +properties:
> +  compatible:
> +    const: sgmicro,sgm3140
> +
> +  enable-gpios:
> +    maxItems: 1
> +    description: A connection to the 'EN' pin.
> +
> +  flash-gpios:
> +    maxItems: 1
> +    description: A connection to the 'FLASH' pin.
> +
> +  vin-supply:
> +    description: Regulator providing power to the 'VIN' pin.
> +
> +  led:

Needs 'type: object'

With that,

Reviewed-by: Rob Herring <robh@...nel.org>

> +    allOf:
> +      - $ref: common.yaml#
> +
> +required:
> +  - compatible
> +  - flash-gpios
> +  - enable-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/leds/common.h>
> +
> +    sgm3140 {
> +        compatible = "sgmicro,sgm3140";
> +        flash-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> +        enable-gpios = <&pio 2 3 GPIO_ACTIVE_HIGH>; /* PC3 */
> +        vin-supply = <&reg_dcdc1>;
> +
> +        sgm3140_flash: led {
> +            function = LED_FUNCTION_FLASH;
> +            color = <LED_COLOR_ID_WHITE>;
> +            flash-max-timeout-us = <250000>;
> +        };
> +    };
> -- 
> 2.26.0
>