dt-bindings: fsi: Convert aspeed,ast2400-cf-fsi-master to DT schema

Convert the ASpeed Coldfire offloaded GPIO FSI master.

Drop the "fsi-master" compatible as it has not be used consistently and
doesn't represent anything.

Acked-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20250731-dt-fsi-cleanups-v1-6-e7b695a29fc3@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/fsi/aspeed,ast2400-cf-fsi-master.yaml

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/fsi/aspeed,ast2400-cf-fsi-master.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASpeed ColdFire offloaded GPIO-based FSI master
+
+maintainers:
+  - Eddie James <eajames@linux.ibm.com>
+
+allOf:
+  - $ref: /schemas/fsi/fsi-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2400-cf-fsi-master
+      - aspeed,ast2500-cf-fsi-master
+
+  clock-gpios:
+    maxItems: 1
+    description: GPIO for FSI clock
+
+  data-gpios:
+    maxItems: 1
+    description: GPIO for FSI data signal
+
+  enable-gpios:
+    maxItems: 1
+    description: GPIO for enable signal
+
+  trans-gpios:
+    maxItems: 1
+    description: GPIO for voltage translator enable
+
+  mux-gpios:
+    maxItems: 1
+    description:
+      GPIO for pin multiplexing with other functions (eg, external FSI masters)
+
+  memory-region:
+    maxItems: 1
+    description:
+      Reference to the reserved memory for the ColdFire. Must be 2M aligned on
+      AST2400 and 1M aligned on AST2500.
+
+  aspeed,cvic:
+    description: Reference to the CVIC node.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  aspeed,sram:
+    description: Reference to the SRAM node.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - clock-gpios
+  - data-gpios
+  - enable-gpios
+  - trans-gpios
+  - mux-gpios
+  - memory-region
+  - aspeed,cvic
+  - aspeed,sram
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    fsi-master {
+      compatible = "aspeed,ast2500-cf-fsi-master";
+      clock-gpios = <&gpio 0>;
+      data-gpios = <&gpio 1>;
+      enable-gpios = <&gpio 2>;
+      trans-gpios = <&gpio 3>;
+      mux-gpios = <&gpio 4>;
+      memory-region = <&coldfire_memory>;
+      aspeed,cvic = <&cvic>;
+      aspeed,sram = <&sram>;
+    };

Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt

@@ -1,36 +0,0 @@
-Device-tree bindings for ColdFire offloaded gpio-based FSI master driver
-------------------------------------------------------------------------
-
-Required properties:
- - compatible =
-	"aspeed,ast2400-cf-fsi-master" for an AST2400 based system
-   or
-	"aspeed,ast2500-cf-fsi-master" for an AST2500 based system
-
- - clock-gpios = <gpio-descriptor>;	: GPIO for FSI clock
- - data-gpios = <gpio-descriptor>;	: GPIO for FSI data signal
- - enable-gpios = <gpio-descriptor>;	: GPIO for enable signal
- - trans-gpios = <gpio-descriptor>;	: GPIO for voltage translator enable
- - mux-gpios = <gpio-descriptor>;	: GPIO for pin multiplexing with other
-                                          functions (eg, external FSI masters)
- - memory-region = <phandle>;		: Reference to the reserved memory for
-                                          the ColdFire. Must be 2M aligned on
-					  AST2400 and 1M aligned on AST2500
- - aspeed,sram = <phandle>;		: Reference to the SRAM node.
- - aspeed,cvic = <phandle>;		: Reference to the CVIC node.
-
-Examples:
-
-    fsi-master {
-        compatible = "aspeed,ast2500-cf-fsi-master", "fsi-master";
-
-	clock-gpios = <&gpio 0>;
-        data-gpios = <&gpio 1>;
-        enable-gpios = <&gpio 2>;
-        trans-gpios = <&gpio 3>;
-        mux-gpios = <&gpio 4>;
-
-	memory-region = <&coldfire_memory>;
-	aspeed,sram = <&sram>;
-	aspeed,cvic = <&cvic>;
-    }