[PATCH] dt-bindings: leds: backlight: Convert TPS65217 to DT schema

Convert the Texas Instruments TPS65217 PMIC bindings to DT schema.

During the conversion, the following updates were made:
- Make the 'backlight' node optional to resolve dtbs_check warnings.
  Some boards declare a bare TPS65217 node without implementing the
  backlight configuration.
- Document the 'isink-en' property in the backlight subnode to resolve
  dtbs_check warnings. This property is used (am335x-guardian.dts)
  to manage the backlight current sinks. It was missing from the old
  txt binding.
- 'additionalProperties: true' is at the top level because the
  TPS65217 node is documented across multiple independent schemas
  matching the same compatible string.

Signed-off-by: Eduard Bostina <[email protected]>
---
 .../bindings/leds/backlight/ti,tps65217.yaml  | 82 +++++++++++++++++++
 .../leds/backlight/tps65217-backlight.txt     | 27 ------
 2 files changed, 82 insertions(+), 27 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,tps65217.yaml
 delete mode 100644 Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt

diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,tps65217.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,tps65217.yaml
new file mode 100644
index 000000000000..07b15cab4b63
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/ti,tps65217.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/ti,tps65217.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TPS65217 family of regulators
+
+maintainers:
+  - Eduard Bostina <[email protected]>
+
+description: |
+  The TPS65217 chip contains a boost converter and current sinks which can be
+  used to drive LEDs for use as backlights.
+
+properties:
+  compatible:
+    const: ti,tps65217
+
+  reg:
+    maxItems: 1
+    description: I2C slave address
+
+  backlight:
+    type: object
+    additionalProperties: false
+    description:
+      Node for specifying WLED1 and WLED2 lines in TPS65217.
+
+    properties:
+      isel:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [1, 2]
+        description: |
+          Selection bit. Valid values:
+            1 - ISEL1 (low-level)
+            2 - ISEL2 (high-level)
+
+      fdim:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [100, 200, 500, 1000]
+        description:
+          PWM dimming frequency in Hz.
+
+      default-brightness:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 0
+        maximum: 100
+
+      isink-en:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Enable backlight current sinks.
+
+    required:
+      - isel
+      - fdim
+      - default-brightness
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: true
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        tps@24 {
+            reg = <0x24>;
+            compatible = "ti,tps65217";
+
+            backlight {
+                isel = <1>;   /* 1 - ISET1, 2 ISET2 */
+                fdim = <100>; /* TPS65217_BL_FDIM_100HZ */
+                default-brightness = <50>;
+            };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt
deleted file mode 100644
index 5fb9279ac287..000000000000
--- a/Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-TPS65217 family of regulators
-
-The TPS65217 chip contains a boost converter and current sinks which can be
-used to drive LEDs for use as backlights.
-
-Required properties:
-- compatible: "ti,tps65217"
-- reg: I2C slave address
-- backlight: node for specifying WLED1 and WLED2 lines in TPS65217
-- isel: selection bit, valid values: 1 for ISEL1 (low-level) and 2 for ISEL2 (high-level)
-- fdim: PWM dimming frequency, valid values: 100, 200, 500, 1000
-- default-brightness: valid values: 0-100
-
-Each regulator is defined using the standard binding for regulators.
-
-Example:
-
-	tps: tps@24 {
-		reg = <0x24>;
-		compatible = "ti,tps65217";
-		backlight {
-			isel = <1>;  /* 1 - ISET1, 2 ISET2 */
-			fdim = <100>; /* TPS65217_BL_FDIM_100HZ */
-			default-brightness = <50>;
-		};
-	};
-
-- 
2.43.0