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So only one led subnode with led-sources is >>>> supported right now. If at some point the driver functionality is >>>> expanded the bindings can be easily extended with it. >>>> --- >>>> .../bindings/leds/backlight/maxim,max25014.yaml | 107 +++++++++++++++++++++ >>>> MAINTAINERS | 5 + >>>> 2 files changed, 112 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 000000000000..e83723224b07 >>>> --- /dev/null >>>> +++ b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml >>>> @@ -0,0 +1,107 @@ >>>> +# 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 >>>> + >>>> +properties: >>>> + compatible: >>>> + enum: >>>> + - maxim,max25014 >>>> + >>>> + reg: >>>> + maxItems: 1 >>>> + >>>> + "#address-cells": >>>> + const: 1 >>>> + >>>> + "#size-cells": >>>> + const: 0 >>>> + >>>> + 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 field in the ISET register. This controls the current >>>> + scale of the outputs, a higher number means more current. >>>> + >>>> + led@0: >>> >>> define whole binding, allow 0-3. binding is not related with driver's >>> implement. >>> >>> it'd better put unders leds. >>> >> >> so like: >> >> backlight: backlight@6f { >> compatible = "maxim,max25014"; >> reg = <0x6f>; >> enable-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>; >> pinctrl-names = "default"; >> pinctrl-0 = <&pinctrl_backlight>; >> maxim,iset = <7>; >> >> leds { >> #address-cells = <1>; >> #size-cells = <0>; >> >> led@0 { >> reg = <0>; >> led-sources = <0 1 2>; >> default-brightness = <50>; >> }; >> >> optional led@#.... >> }; >> }; >> >> right? > > yes. > I am feeling a bit weird about these led sub nodes, because it is not programmed as a led driver, it is programmed as a backlight. I am trying to figure out how this would be used later when the led strings are individually controllable. it isn't possible to link the seperate strings to different displays because it is only one backlight device, so I don't seen any reason why it would ever be used in another way than what it is now, were all strings are programmed by one register. The only way I can make sense of it is if instead I program this device as a led driver and then use the led_bl driver as the actual backlight. Thats a pretty big step in a different direction, but then the led subnodes at least can be properly used I feel. Kind regards, Maud