dt-bindings: leds: add TI/National Semiconductor LP5812 LED Driver

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>

1 files changed, 246 insertions, 0 deletions

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>;
+                };
+            };
+        };
+    };
+
+...