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dt-bindings: leds: Document LTC3208 Multidisplay LED Driver
Add Devicetree Documentation for LTC3208 Multidisplay LED Driver. Signed-off-by: Jan Carlo Roleda <jancarlo.roleda@analog.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> Link: https://patch.msgid.link/20260923003325.61722-2-jancarlo.roleda@analog.com Signed-off-by: Lee Jones <lee@kernel.org>
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Jan Carlo Roleda
Lee Jones
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183
Documentation/devicetree/bindings/leds/adi,ltc3208.yaml
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183
Documentation/devicetree/bindings/leds/adi,ltc3208.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright (c) 2026 Analog Devices, Inc.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/adi,ltc3208.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: LTC3208 Multidisplay LED Controller from Linear Technologies (Now Analog Devices)
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maintainers:
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- Jan Carlo Roleda <jancarlo.roleda@analog.com>
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description:
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The LTC3208 is a multidisplay LED controller that can support up to 1A to all
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connected LEDs.
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The datasheet for this device can be found in
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https://www.analog.com/en/products/ltc3208.html
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properties:
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compatible:
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const: adi,ltc3208
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reg:
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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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adi,disable-camhl-pin:
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type: boolean
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description:
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Configures whether the external CAMHL pin is disabled.
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If disabled then the output pins associated with CAM will always select
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the CAM register's high half-byte brightness.
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adi,cfg-enrgbs-pin:
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type: boolean
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description:
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Configures which channel the ENRGBS pin toggles when it receives a signal.
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ENRGBS pin controls the SUB channel's output pins if this is set,
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or RGB channel's output pins if this is unset.
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adi,disable-rgb-aux4-dropout:
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type: boolean
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description:
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Configures the RGB and AUX4 dropout signals to be disabled.
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adi,aux1-channel:
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$ref: /schemas/types.yaml#/definitions/string
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description:
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LED Channel that the AUX1 output pin mirrors its brightness level from.
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enum: [aux, main, sub, cam]
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default: aux
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adi,aux2-channel:
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$ref: /schemas/types.yaml#/definitions/string
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description:
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LED Channel that the AUX2 output pin mirrors its brightness level from.
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enum: [aux, main, sub, cam]
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default: aux
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adi,aux3-channel:
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$ref: /schemas/types.yaml#/definitions/string
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description:
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LED Channel that the AUX3 output pin mirrors its brightness level from.
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enum: [aux, main, sub, cam]
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default: aux
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adi,aux4-channel:
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$ref: /schemas/types.yaml#/definitions/string
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description:
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LED Channel that the AUX4 output pin mirrors its brightness level from.
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enum: [aux, main, sub, cam]
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default: aux
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patternProperties:
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"^led@[0-7]$":
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type: object
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$ref: /schemas/leds/common.yaml#
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unevaluatedProperties: false
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properties:
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reg:
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description:
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LED Channel Number. each channel maps to a specific channel group used
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to configure the brightness level of the output pins corresponding to
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the channel.
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enum:
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- 0 # Main Channel (8-bit brightness)
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- 1 # Sub Channel (8-bit brightness)
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- 2 # AUX Channel (4-bit brightness)
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- 3 # Camera Channel, Low-side byte (4-bit brightness)
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- 4 # Camera Channel, High-side byte (4-bit brightness)
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- 5 # Red Channel (4-bit brightness)
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- 6 # Blue Channel (4-bit brightness)
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- 7 # Green Channel (4-bit brightness)
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required:
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- reg
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required:
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- compatible
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- reg
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- "#address-cells"
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- "#size-cells"
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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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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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led-controller@1b {
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compatible = "adi,ltc3208";
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reg = <0x1b>;
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#address-cells = <1>;
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#size-cells = <0>;
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adi,disable-camhl-pin;
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adi,cfg-enrgbs-pin;
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adi,disable-rgb-aux4-dropout;
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/* MAIN */
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led@0 {
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reg = <0>;
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function = LED_FUNCTION_ACTIVITY;
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color = <LED_COLOR_ID_WHITE>;
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};
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/* SUB */
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led@1 {
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reg = <1>;
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function = LED_FUNCTION_ACTIVITY;
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color = <LED_COLOR_ID_WHITE>;
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};
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/* AUX */
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led@2 {
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reg = <2>;
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function = LED_FUNCTION_ACTIVITY;
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color = <LED_COLOR_ID_WHITE>;
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};
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/* CAMLO */
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led@3 {
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reg = <3>;
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function = LED_FUNCTION_FLASH;
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color = <LED_COLOR_ID_WHITE>;
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};
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/* CAMHI */
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led@4 {
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reg = <4>;
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function = LED_FUNCTION_FLASH;
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color = <LED_COLOR_ID_WHITE>;
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};
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/* RED */
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led@5 {
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reg = <5>;
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function = LED_FUNCTION_INDICATOR;
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color = <LED_COLOR_ID_RED>;
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};
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/* BLUE */
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led@6 {
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reg = <6>;
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function = LED_FUNCTION_INDICATOR;
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color = <LED_COLOR_ID_BLUE>;
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};
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/* GREEN */
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led@7 {
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reg = <7>;
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function = LED_FUNCTION_INDICATOR;
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color = <LED_COLOR_ID_GREEN>;
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};
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};
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};
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@ -15527,6 +15527,13 @@ W: https://ez.analog.com/linux-software-drivers
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F: Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
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F: drivers/iio/temperature/ltc2983.c
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LTC3208 LED DRIVER
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M: Jan Carlo Roleda <jancarlo.roleda@analog.com>
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L: linux-leds@vger.kernel.org
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S: Maintained
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W: https://ez.analog.com/linux-software-drivers
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F: Documentation/devicetree/bindings/leds/adi,ltc3208.yaml
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LTC3220 LED DRIVER
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M: Edelweise Escala <edelweise.escala@analog.com>
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L: linux-leds@vger.kernel.org
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