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Wed, 25 Mar 2026 18:32:17 -0400 From: Jan Carlo Roleda Date: Thu, 26 Mar 2026 06:30:12 +0800 Subject: [PATCH v2 3/3] dt-bindings: leds: Document LTC3208 Multidisplay LED Driver Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20260326-upstream-ltc3208-v2-3-3dbc992b6098@analog.com> References: <20260326-upstream-ltc3208-v2-0-3dbc992b6098@analog.com> In-Reply-To: <20260326-upstream-ltc3208-v2-0-3dbc992b6098@analog.com> To: Lee Jones , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , Jan Carlo Roleda X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1774477924; l=5265; i=jancarlo.roleda@analog.com; s=20260317; h=from:subject:message-id; bh=tJuvdhJxmWTI0Sx5YELI4sXXkyHVhV2DJahJAn+GNRw=; b=q1RHIPFP181TRu0IxAs8ERMvIjT1aRN1oini1clzLq+vEbpo9y89zfAndzEHXk0MSxlAxD8lB 5j+7j7XhCAUBF3Y/RoFwSUAP64roOGlbULsuzPoh7GqAYbJNFMElpjq X-Developer-Key: i=jancarlo.roleda@analog.com; 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Signed-off-by: Jan Carlo Roleda --- .../devicetree/bindings/leds/adi,ltc3208.yaml | 158 +++++++++++++++++= ++++ MAINTAINERS | 1 + 2 files changed, 159 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml b/Docu= mentation/devicetree/bindings/leds/adi,ltc3208.yaml new file mode 100644 index 000000000000..c139937936bc --- /dev/null +++ b/Documentation/devicetree/bindings/leds/adi,ltc3208.yaml @@ -0,0 +1,158 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (c) 2026 Analog Devices, Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/adi,ltc3208.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: LTC3208 Multidisplay LED Controller from Linear Technologies (Now A= nalog Devices). + +maintainers: + - Jan Carlo Roleda + +description: + The LTC3208 is a multidisplay LED controller that can support up to 1A t= o 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 sel= ect + 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 s= ignal. + 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 fr= om. + 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 fr= om. + 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 fr= om. + enum: [aux, main, sub, cam] + default: aux + + adi,aux4-channel: + $ref: /schemas/types.yaml#/definitions/string + description: + LED Channel that the AUX4 output pin mirrors its brightness level fr= om. + enum: [aux, main, sub, cam] + default: aux + +patternProperties: + "^led@[0-7]$": + type: object + $ref: /schemas/leds/common.yaml# + unevaluatedProperties: false + properties: + reg: + description: + LED Channel Number. each channel maps to a specific channel grou= p used + to configure the brightness level of the output pins correspondi= ng 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 + #include + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + led-controller@1b { + compatible =3D "adi,ltc3208"; + reg =3D <0x1b>; + #address-cells =3D <1>; + #size-cells =3D <0>; + adi,disable-camhl-pin; + adi,cfg-enrgbs-pin; + adi,disable-rgb-aux4-dropout; + + led@0 { + reg =3D <0>; + }; + + led@1 { + reg =3D <1>; + }; + + led@2 { + reg =3D <2>; + }; + + led@3 { + reg =3D <3>; + }; + + led@4 { + reg =3D <4>; + }; + + led@5 { + reg =3D <5>; + }; + + led@6 { + reg =3D <6>; + }; + + led@7 { + reg =3D <7>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 48bae02057d5..97072e906928 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15131,6 +15131,7 @@ M: Jan Carlo Roleda 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 =20 LTC4282 HARDWARE MONITOR DRIVER --=20 2.43.0