[PATCH v17 1/3] dt-bindings: leds: add TI/National Semiconductor LP5812 LED Driver

Nam Tran
2025-10-21T15:59:41Z

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.

Signed-off-by: Nam Tran <trannamatk@gmail.com>
---
.../devicetree/bindings/leds/ti,lp5812.yaml | 246 ++++++++++++++++++
MAINTAINERS | 6 +
2 files changed, 252 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/ti,lp5812.yaml

diff --git a/Documentation/devicetree/bindings/leds/ti,lp5812.yaml b/Documentation/devicetree/bindings/leds/ti,lp5812.yaml
new file mode 100644
index 000000000000..de34bff441c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/ti,lp5812.yaml
@@ -0,0 +1,246 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/ti,lp5812.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LP5812 4x3 Matrix RGB LED Driver with Autonomous Control
+
+maintainers:
+ - Nam Tran <trannamatk@gmail.com>
+
+description: |
+ The LP5812 is a 4x3 matrix RGB LED driver with I2C interface
+ and autonomous animation engine control.
+ For more product information please see the link below:
+ https://www.ti.com/product/LP5812#tech-docs
+
+properties:
+ compatible:
+ const: ti,lp5812
+
+ reg:
+ maxItems: 1
+
+ ti,scan-mode:
+ description: |
+ Selects the LED scan mode of the LP5812. The device supports
+ three modes:
+ - Direct-drive mode (by default if 'ti,scan-mode' is omitted)
+ drives up to 4 LEDs directly by internal current sinks (LED0-LED3).
+ - TCM-drive mode ("tcm:<n>:<order...>") drives up to 12 LEDs
+ (4 RGB) using 1-4 scan multiplexing. The <n> specifies the number
+ of scans (1-4), and <order...> defines the scan order of the outputs.
+ - Mix-drive mode ("mix:<n>:<direct>:<order...>") combines
+ direct-drive and TCM-drive outputs. The <n> specifies the number
+ of scans, <direct> selects the direct-drive outputs, and <order...>
+ defines the scan order.
+ $ref: /schemas/types.yaml#/definitions/string
+ pattern: '^(tcm|mix):[1-4](:[0-3]){1,4}$'
+
+ vcc-supply:
+ description: Regulator providing power to the 'VCC' pin.
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+patternProperties:
+ "^led@[0-3]$":
+ type: object
+ $ref: common.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ minimum: 0
+ maximum: 3
+
+ required:
+ - reg
+
+ "^multi-led@[4-7]$":
+ type: object
+ $ref: leds-class-multicolor.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ minimum: 4
+ maximum: 7
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ patternProperties:
+ "^led@[4-9a-f]$":
+ type: object
+ $ref: common.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ minimum: 4
+ maximum: 15
+
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/leds/common.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@1b {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lp5812";
+ reg = <0x1b>;
+ ti,scan-mode = "tcm:4:0:1:2:3";
+ vcc-supply = <&vdd_3v3_reg>;
+
+ led@0 {
+ reg = <0x0>;
+ label = "LED0";
+ led-max-microamp = <25500>;
+ };
+
+ led@1 {
+ reg = <0x1>;
+ label = "LED1";
+ led-max-microamp = <25500>;
+ };
+
+ led@2 {
+ reg = <0x2>;
+ label = "LED2";
+ led-max-microamp = <25500>;
+ };
+
+ led@3 {
+ reg = <0x3>;
+ label = "LED3";
+ led-max-microamp = <25500>;
+ };
+
+ multi-led@4 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x4>;
+ color = <LED_COLOR_ID_RGB>;
+ label = "LED_A";
+
+ led@4 {
+ reg = <0x4>;
+ color = <LED_COLOR_ID_GREEN>;
+ led-max-microamp = <25500>;
+ };
+
+ led@5 {
+ reg = <0x5>;
+ color = <LED_COLOR_ID_RED>;
+ led-max-microamp = <25500>;
+ };
+
+ led@6 {
+ reg = <0x6>;
+ color = <LED_COLOR_ID_BLUE>;
+ led-max-microamp = <25500>;
+ };
+ };
+
+ multi-led@5 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x5>;
+ color = <LED_COLOR_ID_RGB>;
+ label = "LED_B";
+
+ led@7 {
+ reg = <0x7>;
+ color = <LED_COLOR_ID_GREEN>;
+ led-max-microamp = <25500>;
+ };
+
+ led@8 {
+ reg = <0x8>;
+ color = <LED_COLOR_ID_RED>;
+ led-max-microamp = <25500>;
+ };
+
+ led@9 {
+ reg = <0x9>;
+ color = <LED_COLOR_ID_BLUE>;
+ led-max-microamp = <25500>;
+ };
+ };
+
+ multi-led@6 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x6>;
+ color = <LED_COLOR_ID_RGB>;
+ label = "LED_C";
+
+ led@a {
+ reg = <0xa>;
+ color = <LED_COLOR_ID_GREEN>;
+ led-max-microamp = <25500>;
+ };
+
+ led@b {
+ reg = <0xb>;
+ color = <LED_COLOR_ID_RED>;
+ led-max-microamp = <25500>;
+ };
+
+ led@c {
+ reg = <0xc>;
+ color = <LED_COLOR_ID_BLUE>;
+ led-max-microamp = <25500>;
+ };
+ };
+
+ multi-led@7 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x7>;
+ color = <LED_COLOR_ID_RGB>;
+ label = "LED_D";
+
+ led@d {
+ reg = <0xd>;
+ color = <LED_COLOR_ID_GREEN>;
+ led-max-microamp = <25500>;
+ };
+
+ led@e {
+ reg = <0xe>;
+ color = <LED_COLOR_ID_RED>;
+ led-max-microamp = <25500>;
+ };
+
+ led@f {
+ reg = <0xf>;
+ color = <LED_COLOR_ID_BLUE>;
+ led-max-microamp = <25500>;
+ };
+ };
+ };
+ };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 545a4776795e..6a84f999ef73 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25424,6 +25424,12 @@ S: Supported
F: Documentation/devicetree/bindings/iio/dac/ti,dac7612.yaml
F: drivers/iio/dac/ti-dac7612.c

+TEXAS INSTRUMENTS' LP5812 RGB LED DRIVER
+M: Nam Tran <trannamatk@gmail.com>
+L: linux-leds@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/leds/ti,lp5812.yaml
+
TEXAS INSTRUMENTS' LB8864 LED BACKLIGHT DRIVER
M: Alexander Sverdlin <alexander.sverdlin@siemens.com>
L: linux-leds@vger.kernel.org
--
2.25.1