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Merge tag 'leds-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds
Pull LED updates from Pavel Machek: "Okay, so... this one is interesting. RGB LEDs are very common, and we need to have some kind of support for them. Multicolor is for arbitrary set of LEDs in one package, RGB is for LEDs that can produce full range of colors. We do not have real multicolor LED that is not RGB in the pipeline, so that one is disabled for now. You can expect this saga to continue with next pull requests" * tag 'leds-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds: (37 commits) MAINTAINERS: Remove myself as LED subsystem maintainer leds: disallow /sys/class/leds/*:multi:* for now leds: add RGB color option, as that is different from multicolor. Make LEDS_LP55XX_COMMON depend on I2C to fix build errors: Documentation: ABI: leds-turris-omnia: document sysfs attribute leds: initial support for Turris Omnia LEDs dt-bindings: leds: add cznic,turris-omnia-leds binding leds: pattern trigger -- check pattern for validity leds: Replace HTTP links with HTTPS ones leds: trigger: add support for LED-private device triggers leds: lp5521: Add multicolor framework multicolor brightness support leds: lp5523: Update the lp5523 code to add multicolor brightness function leds: lp55xx: Add multicolor framework support to lp55xx leds: lp55xx: Convert LED class registration to devm_* dt-bindings: leds: Convert leds-lp55xx to yaml leds: multicolor: Introduce a multicolor class definition leds: Add multicolor ID to the color ID list dt: bindings: Add multicolor class dt bindings documention leds: lp5523: Fix various formatting issues in the code leds: lp55xx: Fix file permissions to use DEVICE_ATTR macros ...
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‎Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia

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What: /sys/class/leds/<led>/device/brightness
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Date: July 2020
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KernelVersion: 5.9
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Contact: Marek Behún <[email protected]>
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Description: (RW) On the front panel of the Turris Omnia router there is also
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a button which can be used to control the intensity of all the
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LEDs at once, so that if they are too bright, user can dim them.
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The microcontroller cycles between 8 levels of this global
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brightness (from 100% to 0%), but this setting can have any
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integer value between 0 and 100. It is therefore convenient to be
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able to change this setting from software.
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Format: %i

‎Documentation/ABI/testing/sysfs-class-led-multicolor

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What: /sys/class/leds/<led>/brightness
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Date: March 2020
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KernelVersion: 5.9
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Contact: Dan Murphy <[email protected]>
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Description: read/write
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Writing to this file will update all LEDs within the group to a
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calculated percentage of what each color LED intensity is set
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to. The percentage is calculated for each grouped LED via the
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equation below:
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led_brightness = brightness * multi_intensity/max_brightness
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For additional details please refer to
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Documentation/leds/leds-class-multicolor.rst.
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The value of the LED is from 0 to
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/sys/class/leds/<led>/max_brightness.
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What: /sys/class/leds/<led>/multi_index
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Date: March 2020
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KernelVersion: 5.9
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Contact: Dan Murphy <[email protected]>
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Description: read
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The multi_index array, when read, will output the LED colors
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as an array of strings as they are indexed in the
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multi_intensity file.
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What: /sys/class/leds/<led>/multi_intensity
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Date: March 2020
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KernelVersion: 5.9
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Contact: Dan Murphy <[email protected]>
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Description: read/write
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This file contains array of integers. Order of components is
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described by the multi_index array. The maximum intensity should
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not exceed /sys/class/leds/<led>/max_brightness.

‎Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/cznic,turris-omnia-leds.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: CZ.NIC's Turris Omnia LEDs driver
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maintainers:
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- Marek Behún <[email protected]>
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description:
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This module adds support for the RGB LEDs found on the front panel of the
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Turris Omnia router. There are 12 RGB LEDs that are controlled by a
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microcontroller that communicates via the I2C bus. Each LED is described
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as a subnode of this I2C device.
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properties:
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compatible:
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const: cznic,turris-omnia-leds
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reg:
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description: I2C slave address of the microcontroller.
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maxItems: 1
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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patternProperties:
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"^multi-led[0-9a-f]$":
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type: object
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allOf:
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- $ref: leds-class-multicolor.yaml#
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description:
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This node represents one of the RGB LED devices on Turris Omnia.
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No subnodes need to be added for subchannels since this controller only
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supports RGB LEDs.
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properties:
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reg:
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minimum: 0
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maximum: 11
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description:
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This property identifies one of the LEDs on the front panel of the
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Turris Omnia router.
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required:
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/leds/common.h>
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i2c0 {
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#address-cells = <1>;
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#size-cells = <0>;
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led-controller@2b {
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compatible = "cznic,turris-omnia-leds";
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reg = <0x2b>;
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#address-cells = <1>;
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#size-cells = <0>;
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multi-led@0 {
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/*
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* No subnodes are needed, this controller only supports RGB
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* LEDs.
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*/
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reg = <0>;
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color = <LED_COLOR_ID_MULTI>;
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function = LED_FUNCTION_POWER;
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linux,default-trigger = "heartbeat";
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};
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multi-led@a {
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reg = <0xa>;
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color = <LED_COLOR_ID_MULTI>;
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function = LED_FUNCTION_INDICATOR;
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function-enumerator = <1>;
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};
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};
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};
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...

‎Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/leds-class-multicolor.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Common properties for the multicolor LED class.
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maintainers:
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- Dan Murphy <[email protected]>
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description: |
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Bindings for multi color LEDs show how to describe current outputs of
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either integrated multi-color LED elements (like RGB, RGBW, RGBWA-UV
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etc.) or standalone LEDs, to achieve logically grouped multi-color LED
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modules. This is achieved by adding multi-led nodes layer to the
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monochrome LED bindings.
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The nodes and properties defined in this document are unique to the multicolor
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LED class. Common LED nodes and properties are inherited from the common.txt
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within this documentation directory.
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patternProperties:
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"^multi-led@([0-9a-f])$":
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type: object
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description: Represents the LEDs that are to be grouped.
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properties:
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color:
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const: 8 # LED_COLOR_ID_MULTI
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description: |
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For multicolor LED support this property should be defined as
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LED_COLOR_ID_MULTI which can be found in include/linux/leds/common.h.
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$ref: "common.yaml#"
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required:
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- color
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...

‎Documentation/devicetree/bindings/leds/leds-lm3532.txt

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};
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For more product information please see the links below:
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http://www.ti.com/product/LM3532
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https://www.ti.com/product/LM3532

‎Documentation/devicetree/bindings/leds/leds-lm3601x.txt

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}
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For more product information please see the links below:
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http://www.ti.com/product/LM36010
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http://www.ti.com/product/LM36011
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https://www.ti.com/product/LM36010
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https://www.ti.com/product/LM36011

‎Documentation/devicetree/bindings/leds/leds-lm36274.txt

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};
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For more product information please see the link below:
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http://www.ti.com/lit/ds/symlink/lm36274.pdf
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https://www.ti.com/lit/ds/symlink/lm36274.pdf

‎Documentation/devicetree/bindings/leds/leds-lm3692x.txt

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}
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For more product information please see the link below:
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http://www.ti.com/lit/ds/snvsa29/snvsa29.pdf
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https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf

‎Documentation/devicetree/bindings/leds/leds-lm3697.txt

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}
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For more product information please see the link below:
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http://www.ti.com/lit/ds/symlink/lm3697.pdf
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https://www.ti.com/lit/ds/symlink/lm3697.pdf

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