dt-bindings: mtd: convert nxp-spifi.txt to yaml format

Convert nxp-spifi.txt to yaml format.

Additional changes:
- ref /schemas/spi/spi-controller.yaml.
- remove label in example.
- change node name to spi in example.
- remove child node in example.

Signed-off-by: Frank Li <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>

Documentation/devicetree/bindings/mtd/nxp,lpc1773-spifi.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/nxp,lpc1773-spifi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP SPI Flash Interface (SPIFI)
+
+description:
+  NXP SPIFI is a specialized SPI interface for serial Flash devices.
+  It supports one Flash device with 1-, 2- and 4-bits width in SPI
+  mode 0 or 3. The controller operates in either command or memory
+  mode. In memory mode the Flash is accessible from the CPU as
+  normal memory.
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    const: nxp,lpc1773-spifi
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: spifi
+      - const: flash
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: spifi
+      - const: reg
+
+  resets:
+    maxItems: 1
+
+  spi-cpol:
+    enum: [0, 3]
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - clocks
+  - clock-names
+
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/lpc18xx-ccu.h>
+
+    spi@40003000 {
+        compatible = "nxp,lpc1773-spifi";
+        reg = <0x40003000 0x1000>, <0x14000000 0x4000000>;
+        reg-names = "spifi", "flash";
+        interrupts = <30>;
+        clocks = <&ccu1 CLK_SPIFI>, <&ccu1 CLK_CPU_SPIFI>;
+        clock-names = "spifi", "reg";
+        resets = <&rgu 53>;
+    };
+

Documentation/devicetree/bindings/mtd/nxp-spifi.txt

···
-* NXP SPI Flash Interface (SPIFI)
-
-NXP SPIFI is a specialized SPI interface for serial Flash devices.
-It supports one Flash device with 1-, 2- and 4-bits width in SPI
-mode 0 or 3. The controller operates in either command or memory
-mode. In memory mode the Flash is accessible from the CPU as
-normal memory.
-
-Required properties:
-  - compatible : Should be "nxp,lpc1773-spifi"
-  - reg : the first contains the register location and length,
-          the second contains the memory mapping address and length
-  - reg-names: Should contain the reg names "spifi" and "flash"
-  - interrupts : Should contain the interrupt for the device
-  - clocks : The clocks needed by the SPIFI controller
-  - clock-names : Should contain the clock names "spifi" and "reg"
-
-Optional properties:
- - resets : phandle + reset specifier
-
-The SPI Flash must be a child of the SPIFI node and must have a
-compatible property as specified in bindings/mtd/jedec,spi-nor.txt
-
-Optionally it can also contain the following properties.
- - spi-cpol : Controller only supports mode 0 and 3 so either
-              both spi-cpol and spi-cpha should be present or
-              none of them
- - spi-cpha : See above
- - spi-rx-bus-width : Used to select how many pins that are used
-                      for input on the controller
-
-See bindings/spi/spi-bus.txt for more information.
-
-Example:
-spifi: spifi@40003000 {
-	compatible = "nxp,lpc1773-spifi";
-	reg = <0x40003000 0x1000>, <0x14000000 0x4000000>;
-	reg-names = "spifi", "flash";
-	interrupts = <30>;
-	clocks = <&ccu1 CLK_SPIFI>, <&ccu1 CLK_CPU_SPIFI>;
-	clock-names = "spifi", "reg";
-	resets = <&rgu 53>;
-
-	flash@0 {
-		compatible = "jedec,spi-nor";
-		spi-cpol;
-		spi-cpha;
-		spi-rx-bus-width = <4>;
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		partition@0 {
-			label = "data";
-			reg = <0 0x200000>;
-		};
-	};
-};
-