dt-bindings: rng: convert Samsung Exynos TRNG to dtschema

Convert Samsung Exynos SoC True Random Number Generator bindings to DT
schema format using json-schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210811084306.28740-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.txt

@@ -1,17 +0,0 @@
-Exynos True Random Number Generator
-
-Required properties:
-
-- compatible  : Should be "samsung,exynos5250-trng".
-- reg         : Specifies base physical address and size of the registers map.
-- clocks      : Phandle to clock-controller plus clock-specifier pair.
-- clock-names : "secss" as a clock name.
-
-Example:
-
-	rng@10830600 {
-		compatible = "samsung,exynos5250-trng";
-		reg = <0x10830600 0x100>;
-		clocks = <&clock CLK_SSS>;
-		clock-names = "secss";
-	};

Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rng/samsung,exynos5250-trng.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC True Random Number Generator
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+  - Łukasz Stelmach <l.stelmach@samsung.com>
+
+properties:
+  compatible:
+    const: samsung,exynos5250-trng
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: secss
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos5250.h>
+
+    rng@10830600 {
+        compatible = "samsung,exynos5250-trng";
+        reg = <0x10830600 0x100>;
+        clocks = <&clock CLK_SSS>;
+        clock-names = "secss";
+    };

MAINTAINERS

@@ -16302,7 +16302,7 @@ SAMSUNG EXYNOS TRUE RANDOM NUMBER GENERATOR (TRNG) DRIVER
 M:	Łukasz Stelmach <l.stelmach@samsung.com>
 L:	linux-samsung-soc@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.txt
+F:	Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml
 F:	drivers/char/hw_random/exynos-trng.c
 
 SAMSUNG FRAMEBUFFER DRIVER