dt-bindings: mtd: Convert ti, am654-hbmc.txt to YAML schema

Convert ti,am654-hbmc.txt to YAML schema for better checks and
validations of DT.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt

-Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs
-
-Required properties:
-- compatible : "ti,am654-hbmc" for AM654 SoC
-- reg : Two entries:
-	First entry pointed to the register space of HBMC controller
-	Second entry pointing to the memory map region dedicated for
-	MMIO access to attached flash devices
-- ranges : Address translation from offset within CS to allocated MMIO
-	   space in SoC
-
-Optional properties:
-- mux-controls : phandle to the multiplexer that controls selection of
-		 HBMC vs OSPI inside Flash SubSystem (FSS). Default is OSPI,
-		 if property is absent.
-		 See Documentation/devicetree/bindings/mux/reg-mux.txt
-		 for mmio-mux binding details
-
-Example:
-
-	system-controller@47000000 {
-		compatible = "syscon", "simple-mfd";
-		reg = <0x0 0x47000000 0x0 0x100>;
-		#address-cells = <2>;
-		#size-cells = <2>;
-		ranges;
-
-		hbmc_mux: multiplexer {
-			compatible = "mmio-mux";
-			#mux-control-cells = <1>;
-			mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */
-		};
-	};
-
-	hbmc: hyperbus@47034000 {
-		compatible = "ti,am654-hbmc";
-		reg = <0x0 0x47034000 0x0 0x100>,
-			<0x5 0x00000000 0x1 0x0000000>;
-		power-domains = <&k3_pds 55>;
-		#address-cells = <2>;
-		#size-cells = <1>;
-		ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
-			 <0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */
-		mux-controls = <&hbmc_mux 0>;
-
-		/* Slave flash node */
-		flash@0,0 {
-			compatible = "cypress,hyperflash", "cfi-flash";
-			reg = <0x0 0x0 0x4000000>;
-		};
-	};

Documentation/devicetree/bindings/mtd/ti,am654-hbmc.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/ti,am654-hbmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs
+
+maintainers:
+  - Vignesh Raghavendra <vigneshr@ti.com>
+
+properties:
+  compatible:
+    const: ti,am654-hbmc
+
+  reg:
+    maxItems: 2
+
+  power-domains: true
+  '#address-cells': true
+  '#size-cells': true
+  ranges: true
+
+  mux-controls:
+    description: MMIO mux controller node to select b/w OSPI and HBMC.
+
+  clocks:
+    maxItems: 1
+
+patternProperties:
+  "^flash@[0-1],[0-9a-f]+$":
+    type: object
+
+required:
+  - compatible
+  - reg
+  - ranges
+  - clocks
+  - '#address-cells'
+  - '#size-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    bus {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      hbmc: memory-controller@47034000 {
+        compatible = "ti,am654-hbmc";
+        reg = <0x0 0x47034000 0x0 0x100>,
+              <0x5 0x00000000 0x1 0x0000000>;
+        ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
+                 <0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */
+        clocks = <&k3_clks 102 0>;
+        #address-cells = <2>;
+        #size-cells = <1>;
+        power-domains = <&k3_pds 55>;
+        mux-controls = <&hbmc_mux 0>;
+
+        flash@0,0 {
+            compatible = "cypress,hyperflash", "cfi-flash";
+            reg = <0x0 0x0 0x4000000>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+        };
+      };
+    };