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charset="utf-8" Content-Transfer-Encoding: 7bit Message-ID: <20260519-ltc3220-driver-v8-1-e1771c1733f7@analog.com> References: <20260519-ltc3220-driver-v8-0-e1771c1733f7@analog.com> In-Reply-To: <20260519-ltc3220-driver-v8-0-e1771c1733f7@analog.com> To: Lee Jones , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , Edelweise Escala , Conor Dooley X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779153262; l=4655; i=edelweise.escala@analog.com; s=20260106; h=from:subject:message-id; bh=F9oWHDX7YkuX1ViY79oLC/8JD7kuaoJsHI3WFef+f5M=; b=Ro9svG+l3RV+8u7uWd/2qPZyQWfkH4WGEZJGoyczwMMrevCCb/6Cbk288HD+kap4aEQuAYy/8 +8k/O7E6cFaD4J2OgLMpzTsCY+rhvZSibaBoUseEqAq9AKJ9WKsnrdN X-Developer-Key: i=edelweise.escala@analog.com; a=ed25519; pk=lf5HLFe8ZeQjXZgkBkFMK+u9qH5/tqZhCIushTKduNQ= X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: ATumXHSjA76nFCDDWaeNmIkkf7y-pZYp X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE5MDAwOSBTYWx0ZWRfX1mO4fHhxHQhm 2J39OBzbeTGa0HgxDrbaVdDC68r3nAMiIHNppl74u5lN/dIx61IxYPjV2RHVNsc2Q0VVbEhjhhb lHfq7zbI8SvF8kF3JG3C85VTadJI9YdEHjxPh8LCQWMeZuy82A60/dT0LKiOsh0nQJHV6US+rtl Otq2iSGcUQObVqcCRi/3zJt49JBJH/b7Hhxhr7pDUMdbQgKI3gqpO1Po+FcQZ2MmSsMVvob/VLu Xc6lRFJOOJ5rVIprzCTECJpITO64FCLdRAVNAGvM2thDWcUV1tkCVCC1NcCbbO/1YEV7G+lBq3f Xz1l/lYKC55IsNnuEceTPKSuBqM+Fm9TKiCWI15kh7kpPfm1uQcTjJS3TcY25Q44Kq5gWwuh1tB SCPO7dgdEckdWCoXtVwz6hW49bdTtSAsX7LfjZmZ1uWsxXhM5At1Go3UaOAMcW/z9XuIxGMbcx3 dZs7VNZ58fZpAPxlkUA== X-Proofpoint-ORIG-GUID: ATumXHSjA76nFCDDWaeNmIkkf7y-pZYp X-Authority-Analysis: v=2.4 cv=FfwHAp+6 c=1 sm=1 tr=0 ts=6a0bb980 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=uXIjobp8t2wMuQ0fPvqm:22 a=gEfo2CItAAAA:8 a=gAnH3GRIAAAA:8 a=XYAwZIGsAAAA:8 a=VwQbUJbxAAAA:8 a=_3ORjGfkLmd6W5nxMtsA:9 a=QEXdDO2ut3YA:10 a=sptkURWiP4Gy88Gu7hUp:22 a=E8ToXWR_bxluHZ7gmE-Z:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-19_01,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605190009 LTC3220 is a multi-display LED driver with I2C interface. The LTC3220 provides individual brightness control (64-step), blinking, and gradation features for up to 18 LED outputs. Reviewed-by: Conor Dooley Signed-off-by: Edelweise Escala --- .../devicetree/bindings/leds/adi,ltc3220.yaml | 121 +++++++++++++++++++++ MAINTAINERS | 7 ++ 2 files changed, 128 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/adi,ltc3220.yaml b/Documentation/devicetree/bindings/leds/adi,ltc3220.yaml new file mode 100644 index 000000000000..9e545442f3d9 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/adi,ltc3220.yaml @@ -0,0 +1,121 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/adi,ltc3220.yaml# +$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-efficiency, + low-noise charge pump to provide power to up to 18 LED current sources. + The LEDs are individually configurable to 64-step linear brightness control, + 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@([1-9a-f]|1[0-2])$': + 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). + Unit-address must be in hexadecimal (1-12 hex = 1-18 decimal). + For aggregated LED control, define only one LED node with reg = <1> + and use led-sources to list all controlled outputs. Only reg 1 should + 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 = <1>; + #size-cells = <0>; + + led-controller@1c { + compatible = "adi,ltc3220"; + reg = <0x1c>; + #address-cells = <1>; + #size-cells = <0>; + reset-gpios = <&gpio 17 GPIO_ACTIVE_LOW>; + + led@1 { + reg = <0x1>; + function = LED_FUNCTION_INDICATOR; + function-enumerator = <1>; + }; + + led@2 { + reg = <0x2>; + function = LED_FUNCTION_INDICATOR; + function-enumerator = <2>; + }; + + led@3 { + reg = <0x3>; + function = LED_FUNCTION_INDICATOR; + function-enumerator = <3>; + }; + }; + }; + + - | + // Aggregated LED + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@1c { + compatible = "adi,ltc3220"; + reg = <0x1c>; + #address-cells = <1>; + #size-cells = <0>; + + led@1 { + reg = <0x1>; + led-sources = <0x1 0x2 0x3 0x4 0x5 0x6 0x7 0x8 0x9 0xa 0xb 0xc 0xd 0xe 0xf 0x10 0x11 0x12>; + function = LED_FUNCTION_BACKLIGHT; + }; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 327d74ca7ecb..5c10cc3e3022 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 +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/adi,ltc3220.yaml + LTC4282 HARDWARE MONITOR DRIVER M: Nuno Sa L: linux-hwmon@vger.kernel.org -- 2.43.0