dt-bindings: crypto: Convert ti,omap2-aes to DT schema

Convert the TI OMAP AES binding to DT schema format. It's a straight
forward conversion.

Make "ti,hwmods" not required as it is deprecated and only used on
OMAP2.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/devicetree/bindings/crypto/omap-aes.txt

@@ -1,31 +0,0 @@
-OMAP SoC AES crypto Module
-
-Required properties:
-
-- compatible : Should contain entries for this and backward compatible
-  AES versions:
-  - "ti,omap2-aes" for OMAP2.
-  - "ti,omap3-aes" for OMAP3.
-  - "ti,omap4-aes" for OMAP4 and AM33XX.
-  Note that the OMAP2 and 3 versions are compatible (OMAP3 supports
-  more algorithms) but they are incompatible with OMAP4.
-- ti,hwmods: Name of the hwmod associated with the AES module
-- reg : Offset and length of the register set for the module
-- interrupts : the interrupt-specifier for the AES module.
-
-Optional properties:
-- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
-	Documentation/devicetree/bindings/dma/dma.txt
-- dma-names: DMA request names should include "tx" and "rx" if present.
-
-Example:
-	/* AM335x */
-	aes: aes@53500000 {
-		compatible = "ti,omap4-aes";
-		ti,hwmods = "aes";
-		reg = <0x53500000 0xa0>;
-		interrupts = <102>;
-		dmas = <&edma 6>,
-		       <&edma 5>;
-		dma-names = "tx", "rx";
-	};

Documentation/devicetree/bindings/crypto/ti,omap2-aes.yaml

@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ti,omap2-aes.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: OMAP SoC AES crypto Module
+
+maintainers:
+  - Aaro Koskinen <aaro.koskinen@iki.fi>
+  - Andreas Kemnade <andreas@kemnade.info>
+  - Kevin Hilman <khilman@baylibre.com>
+  - Roger Quadros <rogerq@kernel.org>
+  - Tony Lindgren <tony@atomide.com>
+
+properties:
+  compatible:
+    enum:
+      - ti,omap2-aes
+      - ti,omap3-aes
+      - ti,omap4-aes
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  ti,hwmods:
+    description: Name of the hwmod associated with the AES module
+    const: aes
+    deprecated: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    aes@53500000 {
+        compatible = "ti,omap4-aes";
+        reg = <0x53500000 0xa0>;
+        interrupts = <102>;
+        dmas = <&edma 6>,
+               <&edma 5>;
+        dma-names = "tx", "rx";
+    };