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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20260120-ltc3220-driver-v3-1-fef612ec4faa@analog.com> References: <20260120-ltc3220-driver-v3-0-fef612ec4faa@analog.com> In-Reply-To: <20260120-ltc3220-driver-v3-0-fef612ec4faa@analog.com> To: Lee Jones , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , Edelweise Escala X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1768887343; l=4474; i=edelweise.escala@analog.com; s=20260106; h=from:subject:message-id; bh=izkRFsImJONs8OBbxSdbRp2xmeL4H3dT0luy9Pi9y08=; b=Js8SabTvoF0e+1UJOFCrO6s7sDKoi6/L0RNoV++xKY6Jrd7MARWJuTrP65XKWUXFq303PlsDK P+a9RJmDhZFDuavwdibDx4C1YwrPN3DSDVdYdzmN/rgUTr842da+uCF X-Developer-Key: i=edelweise.escala@analog.com; a=ed25519; pk=lf5HLFe8ZeQjXZgkBkFMK+u9qH5/tqZhCIushTKduNQ= X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTIwMDA0NCBTYWx0ZWRfXyksW+Q6CyHdL XYmqbvHY6kbFlx0PDqOEDkQ4HwygG57spL+LI4SwXgQ7/hLuwhS1By/FhJdEAzlmQp+45mY4lrr ppE57Yj0GqNHuuZ8hxV2FMxf3rVnPfp+gRXlKlNyStG6ZnIY//4pKWN0OBvRtfdiJ+TWxptE417 lYIzlOAvyiay6HMFgbXINuZIWh6/4k0e+S2C9h+ptP+E+dEPmCPmLxoVXLQomagIMlmDIlFyGST 9oFZj3eSr/ahd1bq/FeMYBao2CrSbil5l3uc86gv9y8JUyF6b7XcQ0QeuArncQCmpDTpHk3ukbY 45Lvb07aj15YPQiYuRM8UjuC4Ug3NmScnU3gROHBTN5oXSoSxfvssntU1rEBn2obh/lB8v8lPtc Iln5p2cRMPzZhzPJuO2/1xq0raLeGAEKkmgUFl8H8hsvxWQf8T8pn8F78Iw/lrHkvLH/8QZeLpG zwZYHmwIjzWq3kKtDLg== X-Proofpoint-ORIG-GUID: laBGse7uJr6N477fP46_flyoUosyNT70 X-Proofpoint-GUID: laBGse7uJr6N477fP46_flyoUosyNT70 X-Authority-Analysis: v=2.4 cv=Q+DfIo2a c=1 sm=1 tr=0 ts=696f143f cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=gEfo2CItAAAA:8 a=gAnH3GRIAAAA:8 a=VwQbUJbxAAAA:8 a=_3ORjGfkLmd6W5nxMtsA:9 a=QEXdDO2ut3YA:10 a=x-rrmlpudb0A:10 a=V5hIW_BCtU8A:10 a=sptkURWiP4Gy88Gu7hUp:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-20_01,2026-01-19_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 impostorscore=0 malwarescore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601200044 Document device tree bindings for the LTC3220 18-channel LED driver with I2C interface, individual brightness control, and hardware-assisted blink/gradation features. Signed-off-by: Edelweise Escala Reviewed-by: Conor Dooley --- .../devicetree/bindings/leds/leds-ltc3220.yaml | 120 +++++++++++++++++= ++++ MAINTAINERS | 7 ++ 2 files changed, 127 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/leds-ltc3220.yaml b/Doc= umentation/devicetree/bindings/leds/leds-ltc3220.yaml new file mode 100644 index 000000000000..6274c6c6ad79 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-ltc3220.yaml @@ -0,0 +1,120 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/leds-ltc3220.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices LTC3220 LED Driver + +maintainers: + - Edelweise Escala + +description: + The LTC3220 is a multi-display LED driver, which contains a high-efficie= ncy, + low-noise charge pump to provide power to up to 18 LED current sources. + The LEDs are individually configurable to 64-step linear brightness cont= rol, + blinking and gradation control via 2-wire I2C interface. + + For more product information please see the link below + https://www.analog.com/en/products/ltc3220.html + +properties: + compatible: + const: adi,ltc3220 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + reset-gpios: + maxItems: 1 + +patternProperties: + '^led@([1-9]|1[0-8])$': + type: object + $ref: /schemas/leds/common.yaml# + unevaluatedProperties: false + properties: + reg: + description: + Output channel for the LED (1-18 maps to LED outputs D1-D18). + For aggregated LED control, define only one LED node with reg = =3D <1> + and use led-sources to list all controlled outputs. Only reg 1 s= hould + be present when using led-sources. + minimum: 1 + maximum: 18 + + required: + - reg + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + // Independent LEDs + #include + #include + + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + led-controller@1c { + compatible =3D "adi,ltc3220"; + reg =3D <0x1c>; + #address-cells =3D <1>; + #size-cells =3D <0>; + reset-gpios =3D <&gpio 17 GPIO_ACTIVE_LOW>; + + led@1 { + reg =3D <1>; + function =3D LED_FUNCTION_INDICATOR; + function-enumerator =3D <1>; + }; + + led@2 { + reg =3D <2>; + function =3D LED_FUNCTION_INDICATOR; + function-enumerator =3D <2>; + }; + + led@3 { + reg =3D <3>; + function =3D LED_FUNCTION_INDICATOR; + function-enumerator =3D <3>; + }; + }; + }; + + - | + // Aggregated LED + #include + + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + led-controller@1c { + compatible =3D "adi,ltc3220"; + reg =3D <0x1c>; + #address-cells =3D <1>; + #size-cells =3D <0>; + + led@1 { + reg =3D <1>; + led-sources =3D <1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17= 18>; + function =3D LED_FUNCTION_BACKLIGHT; + }; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 327d74ca7ecb..d640c35d1f93 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14955,6 +14955,13 @@ W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml F: drivers/iio/temperature/ltc2983.c =20 +LTC3220 LED DRIVER +M: Edelweise Escala +L: linux-leds@vger.kernel.org +S: Maintained +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/leds/leds-ltc3220.yaml + LTC4282 HARDWARE MONITOR DRIVER M: Nuno Sa L: linux-hwmon@vger.kernel.org --=20 2.43.0