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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. > > If you don't have any use for anything other than driving a single > backlight, then I'd just drop the led nodes completely. Theoretically with how the registers are laid out, it should be able to control 4 led strings individually. But as I said when I configure led string 1 it will also affect all the others seemingly. I am not sure if with some other configuration you can indeed do individual control. Before I start converting stuff back to how it was several versions ago. Frank, do you agree with removing the led nodes in this case? I don't want to get stuck between two different paths. Kind regards, Maud