On Tue, Aug 19, 2025 at 12:58:59PM +0200, Maud Spierings wrote:
> The Maxim MAX25014 is a 4-channel automotive grade backlight driver IC
> with intgrated boost controller.
>
> Signed-off-by: Maud Spierings <maudspieri...@gocontroll.com>
> ---
> .../bindings/leds/backlight/maxim,max25014.yaml | 79
> ++++++++++++++++++++++
> MAINTAINERS | 5 ++
> 2 files changed, 84 insertions(+)
>
> diff --git
> a/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
> b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
> new file mode 100644
> index
> 0000000000000000000000000000000000000000..30b591152fa31d5e43243cac44c72028b05b5f8a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
> @@ -0,0 +1,79 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/backlight/maxim,max25014.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim max25014 backlight controller
> +
> +maintainers:
> + - Maud Spierings <maudspieri...@gocontroll.com>
> +
> +allOf:
> + - $ref: common.yaml#
> +
> +properties:
> + compatible:
> + enum:
> + - maxim,max25014
> +
> + reg:
> + maxItems: 1
> +
> + enable-gpios:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + power-supply:
> + description: Regulator which controls the boost converter input rail.
> +
> + pwms:
> + maxItems: 1
> +
> + maxim,iset:
> + $ref: /schemas/types.yaml#/definitions/uint32
maximum: 15
> + default: 11
> + description:
> + Value of the ISET register field (0-15).
Perhaps a little on what this controls?
> +
> + maxim,strings:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description:
> + A 4-bit bitfield that describes which led strings to turn on.
> + minItems: 4
> + maxItems: 4
items:
maximum: 1
But why not just an 8-bit value 0x0-0xF?
> +
> +required:
> + - compatible
> + - reg
> + - maxim,strings
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + backlight: backlight@6f {
Drop unused labels.
> + reg = <0x6f>;
> + compatible = "maxim,max25014";
compatible is always first.
> + default-brightness = <50>;
> + enable-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
> + interrupt-parent = <&gpio1>;
> + interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_backlight>;
Generally we don't put pinctrl properties in examples as they are always
allowed.
> + power-supply = <®_backlight>;
> + pwms = <&pwm1>;
> + maxim,iset = <7>;
> + maxim,strings = <1 1 1 1>;
> + };
> + };
> +
> diff --git a/MAINTAINERS b/MAINTAINERS
> index
> e81d5f9fbd16cc384356804390d65652bbb9e3f6..11c73d2e37fac22aea852152746236c1472f41b8
> 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -14972,6 +14972,11 @@ F:
> Documentation/userspace-api/media/drivers/max2175.rst
> F: drivers/media/i2c/max2175*
> F: include/uapi/linux/max2175.h
>
> +MAX25014 BACKLIGHT DRIVER
> +M: Maud Spierings <maudspieri...@gocontroll.com>
> +S: Maintained
> +F: Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
> +
> MAX31335 RTC DRIVER
> M: Antoniu Miclaus <antoniu.micl...@analog.com>
> L: linux-...@vger.kernel.org
>
> --
> 2.50.1
>
