dt-bindings: mfd: Convert lp3943 to DT schema

Convert the LP3943 MFD binding from free-form text to DT schema.

The LP3943 is an I2C LED driver with two sub-devices, lp3943-gpio and
lp3943-pwm. The GPIO sub-device is covered by trivial-gpio.yaml, so only
the PWM sub-device gets a schema of its own.

The PWM schema documents ti,pwm0 and ti,pwm1, which select the output pins
of the two internal PWM channels and are read by pwm-lp3943.c with
of_property_read_u32_array().

Assisted-by: LLM
Signed-off-by: Chaosheng Qu <quchaosheng000406@163.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Uwe Kleine-König <ukleinek@kernel.org>
Link: https://patch.msgid.link/20260930023923.49917-1-quchaosheng000406@163.com
Signed-off-by: Lee Jones <lee@kernel.org>

4 files changed, 144 insertions, 91 deletions

diff --git a/Documentation/devicetree/bindings/mfd/lp3943.txt b/Documentation/devicetree/bindings/mfd/lp3943.txt
deleted file mode 100644
index ca5324ed0df4..000000000000
--- a/Documentation/devicetree/bindings/mfd/lp3943.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-TI/National Semiconductor LP3943 MFD driver
-
-Required properties:
-  - compatible: "ti,lp3943"
-  - reg: I2C slave address. From 0x60 to 0x67.
-
-LP3943 consists of two sub-devices, lp3943-gpio and lp3943-pwm.
-
-For the LP3943 GPIO properties please refer to:
-Documentation/devicetree/bindings/gpio/trivial-gpio.yaml
-
-For the LP3943 PWM properties please refer to:
-Documentation/devicetree/bindings/pwm/pwm-lp3943.txt
-
-Example:
-
-lp3943@60 {
-	compatible = "ti,lp3943";
-	reg = <0x60>;
-
-	gpioex: gpio {
-		compatible = "ti,lp3943-gpio";
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
-	pwm3943: pwm {
-		compatible = "ti,lp3943-pwm";
-		#pwm-cells = <2>;
-		ti,pwm0 = <8 9 10>;
-		ti,pwm1 = <15>;
-	};
-};
diff --git a/Documentation/devicetree/bindings/mfd/ti,lp3943.yaml b/Documentation/devicetree/bindings/mfd/ti,lp3943.yaml
new file mode 100644
index 000000000000..eff32b05c21c
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,lp3943.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,lp3943.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI/National Semiconductor LP3943 MFD driver
+
+maintainers:
+  - Chaosheng Qu <quchaosheng000406@163.com>
+
+description:
+  LP3943 is an integrated device capable of driving LEDs. It contains two
+  sub-devices, lp3943-gpio and lp3943-pwm, which are instantiated by the MFD
+  core from the child nodes described below.
+
+properties:
+  compatible:
+    const: ti,lp3943
+
+  reg:
+    maxItems: 1
+    description: I2C slave address, from 0x60 to 0x67
+
+patternProperties:
+  "^gpio":
+    type: object
+    $ref: /schemas/gpio/trivial-gpio.yaml#
+
+  "^pwm":
+    type: object
+    $ref: /schemas/pwm/pwm-lp3943.yaml#
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        lp3943: gpio@60 {
+            compatible = "ti,lp3943";
+            reg = <0x60>;
+
+            gpio {
+                compatible = "ti,lp3943-gpio";
+                gpio-controller;
+                #gpio-cells = <2>;
+            };
+
+            pwm {
+                compatible = "ti,lp3943-pwm";
+                #pwm-cells = <2>;
+                ti,pwm0 = <8 9 10>;
+                ti,pwm1 = <15>;
+            };
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt b/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt
deleted file mode 100644
index f214305a8f5e..000000000000
--- a/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-TI/National Semiconductor LP3943 PWM controller
-
-Required properties:
-  - compatible: "ti,lp3943-pwm"
-  - #pwm-cells: Should be 2. See pwm.yaml in this directory for a
-                description of the cells format.
-                Note that this hardware limits the period length to the
-                range 6250~1600000.
-  - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1.
-    0 = output 0
-    1 = output 1
-    .
-    .
-    15 = output 15
-
-Example:
-PWM 0 is for RGB LED brightness control
-PWM 1 is for brightness control of LP8557 backlight device
-
-&i2c3 {
-	lp3943@60 {
-		compatible = "ti,lp3943";
-		reg = <0x60>;
-
-		/*
-		 * PWM 0 : output 8, 9 and 10
-		 * PWM 1 : output 15
-		 */
-		pwm3943: pwm {
-			compatible = "ti,lp3943-pwm";
-			#pwm-cells = <2>;
-			ti,pwm0 = <8 9 10>;
-			ti,pwm1 = <15>;
-		};
-	};
-
-};
-
-/* LEDs control with PWM 0 of LP3943 */
-pwmleds {
-	compatible = "pwm-leds";
-	rgb {
-		label = "indi::rgb";
-		pwms = <&pwm3943 0 10000>;
-		max-brightness = <255>;
-	};
-};
-
-&i2c4 {
-	/* Backlight control with PWM 1 of LP3943 */
-	backlight@2c {
-		compatible = "ti,lp8557";
-		reg = <0x2c>;
-
-		pwms = <&pwm3943 1 10000>;
-		pwm-names = "lp8557";
-	};
-};
diff --git a/Documentation/devicetree/bindings/pwm/pwm-lp3943.yaml b/Documentation/devicetree/bindings/pwm/pwm-lp3943.yaml
new file mode 100644
index 000000000000..3da5cd4b2ada
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-lp3943.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/pwm-lp3943.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI/National Semiconductor LP3943 PWM controller
+
+maintainers:
+  - Chaosheng Qu <quchaosheng000406@163.com>
+
+description:
+  LP3943 has two internal PWM channels. Each channel can be routed to one or
+  more of the 16 outputs of the device.
+
+  Note that the hardware limits the period length to the range 6250~1600000.
+
+allOf:
+  - $ref: pwm.yaml#
+
+properties:
+  compatible:
+    const: ti,lp3943-pwm
+
+  "#pwm-cells":
+    const: 2
+
+  ti,pwm0:
+    description: Output pin number(s) for PWM channel 0.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 16
+    items:
+      minimum: 0
+      maximum: 15
+
+  ti,pwm1:
+    description: Output pin number(s) for PWM channel 1.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 16
+    items:
+      minimum: 0
+      maximum: 15
+
+anyOf:
+  - required:
+      - ti,pwm0
+  - required:
+      - ti,pwm1
+
+required:
+  - compatible
+  - "#pwm-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gpio@60 {
+            compatible = "ti,lp3943";
+            reg = <0x60>;
+
+            /*
+             * PWM 0 : output 8, 9 and 10
+             * PWM 1 : output 15
+             */
+            pwm {
+                compatible = "ti,lp3943-pwm";
+                #pwm-cells = <2>;
+                ti,pwm0 = <8 9 10>;
+                ti,pwm1 = <15>;
+            };
+        };
+    };
+...