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The LP5812 is a 4x3 RGB LED driver with an autonomous animation engine and time-cross-multiplexing (TCM) support for up to 12 LEDs or 4 RGB LEDs. It supports both analog (256 levels) and PWM (8-bit) dimming, including exponential PWM for smooth brightness control. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Nam Tran <trannamatk@gmail.com> Link: https://patch.msgid.link/20251221041950.4631-2-trannamatk@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
247 lines
6.1 KiB
YAML
247 lines
6.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/ti,lp5812.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: TI LP5812 4x3 Matrix RGB LED Driver with Autonomous Control
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maintainers:
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- Nam Tran <trannamatk@gmail.com>
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description: |
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The LP5812 is a 4x3 matrix RGB LED driver with I2C interface
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and autonomous animation engine control.
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For more product information please see the link below:
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https://www.ti.com/product/LP5812#tech-docs
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properties:
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compatible:
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const: ti,lp5812
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reg:
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maxItems: 1
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ti,scan-mode:
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description: |
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Selects the LED scan mode of the LP5812. The device supports
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three modes:
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- Direct-drive mode (by default if 'ti,scan-mode' is omitted)
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drives up to 4 LEDs directly by internal current sinks (LED0-LED3).
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- TCM-drive mode ("tcm:<n>:<order...>") drives up to 12 LEDs
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(4 RGB) using 1-4 scan multiplexing. The <n> specifies the number
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of scans (1-4), and <order...> defines the scan order of the outputs.
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- Mix-drive mode ("mix:<n>:<direct>:<order...>") combines
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direct-drive and TCM-drive outputs. The <n> specifies the number
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of scans, <direct> selects the direct-drive outputs, and <order...>
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defines the scan order.
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$ref: /schemas/types.yaml#/definitions/string
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pattern: '^(tcm|mix):[1-4](:[0-3]){1,4}$'
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vcc-supply:
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description: Regulator providing power to the 'VCC' pin.
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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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patternProperties:
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"^led@[0-3]$":
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type: object
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$ref: common.yaml#
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unevaluatedProperties: false
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properties:
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reg:
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minimum: 0
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maximum: 3
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required:
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- reg
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"^multi-led@[4-7]$":
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type: object
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$ref: leds-class-multicolor.yaml#
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unevaluatedProperties: false
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properties:
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reg:
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minimum: 4
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maximum: 7
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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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patternProperties:
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"^led@[4-9a-f]$":
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type: object
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$ref: common.yaml#
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unevaluatedProperties: false
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properties:
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reg:
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minimum: 4
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maximum: 15
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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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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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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "ti,lp5812";
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reg = <0x1b>;
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ti,scan-mode = "tcm:4:0:1:2:3";
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vcc-supply = <&vdd_3v3_reg>;
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led@0 {
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reg = <0x0>;
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label = "LED0";
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led-max-microamp = <25500>;
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};
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led@1 {
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reg = <0x1>;
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label = "LED1";
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led-max-microamp = <25500>;
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};
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led@2 {
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reg = <0x2>;
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label = "LED2";
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led-max-microamp = <25500>;
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};
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led@3 {
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reg = <0x3>;
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label = "LED3";
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led-max-microamp = <25500>;
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};
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multi-led@4 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x4>;
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color = <LED_COLOR_ID_RGB>;
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label = "LED_A";
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led@4 {
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reg = <0x4>;
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color = <LED_COLOR_ID_GREEN>;
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led-max-microamp = <25500>;
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};
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led@5 {
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reg = <0x5>;
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color = <LED_COLOR_ID_RED>;
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led-max-microamp = <25500>;
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};
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led@6 {
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reg = <0x6>;
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color = <LED_COLOR_ID_BLUE>;
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led-max-microamp = <25500>;
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};
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};
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multi-led@5 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x5>;
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color = <LED_COLOR_ID_RGB>;
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label = "LED_B";
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led@7 {
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reg = <0x7>;
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color = <LED_COLOR_ID_GREEN>;
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led-max-microamp = <25500>;
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};
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led@8 {
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reg = <0x8>;
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color = <LED_COLOR_ID_RED>;
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led-max-microamp = <25500>;
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};
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led@9 {
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reg = <0x9>;
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color = <LED_COLOR_ID_BLUE>;
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led-max-microamp = <25500>;
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};
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};
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multi-led@6 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x6>;
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color = <LED_COLOR_ID_RGB>;
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label = "LED_C";
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led@a {
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reg = <0xa>;
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color = <LED_COLOR_ID_GREEN>;
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led-max-microamp = <25500>;
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};
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led@b {
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reg = <0xb>;
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color = <LED_COLOR_ID_RED>;
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led-max-microamp = <25500>;
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};
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led@c {
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reg = <0xc>;
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color = <LED_COLOR_ID_BLUE>;
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led-max-microamp = <25500>;
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};
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};
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multi-led@7 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x7>;
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color = <LED_COLOR_ID_RGB>;
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label = "LED_D";
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led@d {
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reg = <0xd>;
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color = <LED_COLOR_ID_GREEN>;
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led-max-microamp = <25500>;
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};
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led@e {
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reg = <0xe>;
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color = <LED_COLOR_ID_RED>;
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led-max-microamp = <25500>;
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};
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led@f {
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reg = <0xf>;
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color = <LED_COLOR_ID_BLUE>;
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led-max-microamp = <25500>;
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};
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};
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};
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};
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...
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