Add Documentation for LTC3208 Multidisplay LED Driver.
Signed-off-by: Jan Carlo Roleda <jancarlo.roleda@analog.com>
---
.../devicetree/bindings/leds/adi,ltc3208.yaml | 159 +++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 160 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml b/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml
new file mode 100644
index 000000000000..58ee7a9cc66e
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml
@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2026 Analog Devices, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-ltc3208.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LTC3208 Multidisplay LED Controller from Linear Technologies (Now Analog Devices).
+
+maintainers:
+ - Jan Carlo Roleda <jancarlo.roleda@analog.com>
+
+description:
+ The LTC3208 is a multidisplay LED controller that can support up to 1A to all
+ connected LEDs.
+
+ The datasheet for this device can be found in
+ https://www.analog.com/en/products/ltc3208.html
+
+
+properties:
+ compatible:
+ const: adi,ltc3208
+
+ reg:
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ adi,disable-camhl-pin:
+ type: boolean
+ description:
+ Configures whether the external CAMHL pin is disabled.
+ if disabled then the output pins associated with CAM will always select
+ the CAM register's high half-byte brightness.
+
+ adi,cfg-enrgbs-pin:
+ type: boolean
+ description:
+ Configures which channel the ENRGBS pin toggles when it receives a signal.
+ ENRGBS pin controls the SUB channel's output pins if this is set,
+ or RGB channel's output pins if this is unset.
+
+ adi,disable-rgb-aux4-dropout:
+ type: boolean
+ description:
+ Configures the RGB and AUX4 dropout signals to be disabled.
+
+ adi,aux1-channel:
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ LED Channel that the AUX1 output pin mirrors its brightness level from.
+ enum: [aux, main, sub, cam]
+ default: aux
+
+ adi,aux2-channel:
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ LED Channel that the AUX2 output pin mirrors its brightness level from.
+ enum: [aux, main, sub, cam]
+ default: aux
+
+ adi,aux3-channel:
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ LED Channel that the AUX3 output pin mirrors its brightness level from.
+ enum: [aux, main, sub, cam]
+ default: aux
+
+ adi,aux4-channel:
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ LED Channel that the AUX4 output pin mirrors its brightness level from.
+ enum: [aux, main, sub, cam]
+ default: aux
+
+patternProperties:
+ "^led@[0-7]$":
+ type: object
+ $ref: /schemas/leds/common.yaml#
+ unevaluatedProperties: false
+ properties:
+ reg:
+ description:
+ LED Channel Number. each channel maps to a specific channel group used
+ to configure the brightness level of the output pins corresponding to
+ the channel.
+ enum:
+ - 0 # Main Channel (8-bit brightness)
+ - 1 # Sub Channel (8-bit brightness)
+ - 2 # AUX Channel (4-bit brightness)
+ - 3 # Camera Channel, Low-side byte (4-bit brightness)
+ - 4 # Camera Channel, High-side byte (4-bit brightness)
+ - 5 # Red Channel (4-bit brightness)
+ - 6 # Blue Channel (4-bit brightness)
+ - 7 # Green Channel (4-bit brightness)
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/leds/common.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@1b {
+ compatible = "adi,ltc3208";
+ reg = <0x1b>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ adi,disable-camhl-pin;
+ adi,cfg-enrgbs-pin;
+ adi,disable-rgb-aux4-dropout;
+
+ led@0 {
+ reg = <0>;
+ };
+
+ led@1 {
+ reg = <1>;
+ };
+
+ led@2 {
+ reg = <2>;
+ };
+
+ led@3 {
+ reg = <3>;
+ };
+
+ led@4 {
+ reg = <4>;
+ };
+
+ led@5 {
+ reg = <5>;
+ };
+
+ led@6 {
+ reg = <6>;
+ };
+
+ led@7 {
+ reg = <7>;
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 48bae02057d5..97072e906928 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15131,6 +15131,7 @@ M: Jan Carlo Roleda <jancarlo.roleda@analog.com>
L: linux-leds@vger.kernel.org
S: Maintained
W: https://ez.analog.com/linux-software-drivers
+F: Documentation/devicetree/bindings/leds/adi,ltc3208.yaml
F: drivers/leds/leds-ltc3208.c
LTC4282 HARDWARE MONITOR DRIVER
--
2.43.0On Wed, 18 Mar 2026 14:59:22 +0800, Jan Carlo Roleda wrote: > Add Documentation for LTC3208 Multidisplay LED Driver. > > Signed-off-by: Jan Carlo Roleda <jancarlo.roleda@analog.com> > --- > .../devicetree/bindings/leds/adi,ltc3208.yaml | 159 +++++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 160 insertions(+) > My bot found errors running 'make dt_binding_check' on your patch: yamllint warnings/errors: ./Documentation/devicetree/bindings/leds/adi,ltc3208.yaml:20:1: [warning] too many blank lines (2 > 1) (empty-lines) dtschema/dtc warnings/errors: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml: $id: Cannot determine base path from $id, relative path/filename doesn't match actual path or filename $id: http://devicetree.org/schemas/leds/leds-ltc3208.yaml file: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml doc reference errors (make refcheckdocs): See https://patchwork.kernel.org/project/devicetree/patch/20260318-upstream-ltc3208-v1-3-015f1f1e9065@analog.com The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.
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