dt-bindings: clock: samsung,s3c6400-clock: convert to DT Schema

Convert Samsung S3C6400/S3C6410 SoC clock controller bindings to DT
schema.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20240312185035.720491-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/clock/samsung,s3c6400-clock.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/samsung,s3c6400-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung S3C6400 SoC clock controller
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@kernel.org>
+
+description: |
+  There are several clocks that are generated outside the SoC. It is expected
+  that they are defined using standard clock bindings with following
+  clock-output-names and/or provided as clock inputs to this clock controller:
+   - "fin_pll" - PLL input clock (xtal/extclk) - required,
+   - "xusbxti" - USB xtal - required,
+   - "iiscdclk0" - I2S0 codec clock - optional,
+   - "iiscdclk1" - I2S1 codec clock - optional,
+   - "iiscdclk2" - I2S2 codec clock - optional,
+   - "pcmcdclk0" - PCM0 codec clock - optional,
+   - "pcmcdclk1" - PCM1 codec clock - optional, only S3C6410.
+
+  All available clocks are defined as preprocessor macros in
+  include/dt-bindings/clock/samsung,s3c64xx-clock.h header.
+
+properties:
+  compatible:
+    enum:
+      - samsung,s3c6400-clock
+      - samsung,s3c6410-clock
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - "#clock-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@7e00f000 {
+        compatible = "samsung,s3c6410-clock";
+        reg = <0x7e00f000 0x1000>;
+        #clock-cells = <1>;
+        clocks = <&fin_pll>;
+    };

Documentation/devicetree/bindings/clock/samsung,s3c64xx-clock.txt

-* Samsung S3C64xx Clock Controller
-
-The S3C64xx clock controller generates and supplies clock to various controllers
-within the SoC. The clock binding described here is applicable to all SoCs in
-the S3C64xx family.
-
-Required Properties:
-
-- compatible: should be one of the following.
-  - "samsung,s3c6400-clock" - controller compatible with S3C6400 SoC.
-  - "samsung,s3c6410-clock" - controller compatible with S3C6410 SoC.
-
-- reg: physical base address of the controller and length of memory mapped
-  region.
-
-- #clock-cells: should be 1.
-
-Each clock is assigned an identifier and client nodes can use this identifier
-to specify the clock which they consume. Some of the clocks are available only
-on a particular S3C64xx SoC and this is specified where applicable.
-
-All available clocks are defined as preprocessor macros in
-dt-bindings/clock/samsung,s3c64xx-clock.h header and can be used in device
-tree sources.
-
-External clocks:
-
-There are several clocks that are generated outside the SoC. It is expected
-that they are defined using standard clock bindings with following
-clock-output-names:
- - "fin_pll" - PLL input clock (xtal/extclk) - required,
- - "xusbxti" - USB xtal - required,
- - "iiscdclk0" - I2S0 codec clock - optional,
- - "iiscdclk1" - I2S1 codec clock - optional,
- - "iiscdclk2" - I2S2 codec clock - optional,
- - "pcmcdclk0" - PCM0 codec clock - optional,
- - "pcmcdclk1" - PCM1 codec clock - optional, only S3C6410.
-
-Example: Clock controller node:
-
-	clock: clock-controller@7e00f000 {
-		compatible = "samsung,s3c6410-clock";
-		reg = <0x7e00f000 0x1000>;
-		#clock-cells = <1>;
-	};
-
-Example: Required external clocks:
-
-	fin_pll: clock-fin-pll {
-		compatible = "fixed-clock";
-		clock-output-names = "fin_pll";
-		clock-frequency = <12000000>;
-		#clock-cells = <0>;
-	};
-
-	xusbxti: clock-xusbxti {
-		compatible = "fixed-clock";
-		clock-output-names = "xusbxti";
-		clock-frequency = <48000000>;
-		#clock-cells = <0>;
-	};
-
-Example: UART controller node that consumes the clock generated by the clock
-  controller (refer to the standard clock bindings for information about
-  "clocks" and "clock-names" properties):
-
-		uart0: serial@7f005000 {
-			compatible = "samsung,s3c6400-uart";
-			reg = <0x7f005000 0x100>;
-			interrupt-parent = <&vic1>;
-			interrupts = <5>;
-			clock-names = "uart", "clk_uart_baud2",
-					"clk_uart_baud3";
-			clocks = <&clock PCLK_UART0>, <&clocks PCLK_UART0>,
-					<&clock SCLK_UART>;
-		};