dt-bindings: crypto: Convert Allwinner A10 Security Engine to a schema

The older Allwinner SoCs have a crypto engine that is supported in Linux,
with a matching Device Tree binding.

Now that we have the DT validation in place, let's convert the device tree
bindings for that controller over to a YAML schemas.

Signed-off-by: Maxime Ripard <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/crypto/allwinner,sun4i-a10-crypto.yaml

···
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/allwinner,sun4i-a10-crypto.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A10 Security System Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <[e-mail]>
+  - Maxime Ripard <[e-mail]>
+
+properties:
+  compatible:
+    oneOf:
+      - const: allwinner,sun4i-a10-crypto
+      - items:
+        - const: allwinner,sun5i-a13-crypto
+        - const: allwinner,sun4i-a10-crypto
+      - items:
+        - const: allwinner,sun6i-a31-crypto
+        - const: allwinner,sun4i-a10-crypto
+      - items:
+        - const: allwinner,sun7i-a20-crypto
+        - const: allwinner,sun4i-a10-crypto
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bus Clock
+      - description: Module Clock
+
+  clock-names:
+    items:
+      - const: ahb
+      - const: mod
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: ahb
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: allwinner,sun6i-a31-crypto
+
+then:
+  required:
+    - resets
+    - reset-names
+
+additionalProperties: false
+
+examples:
+  - |
+    crypto: crypto-engine@1c15000 {
+      compatible = "allwinner,sun4i-a10-crypto";
+      reg = <0x01c15000 0x1000>;
+      interrupts = <86>;
+      clocks = <&ahb_gates 5>, <&ss_clk>;
+      clock-names = "ahb", "mod";
+    };
+
+...

Documentation/devicetree/bindings/crypto/sun4i-ss.txt

···
-* Allwinner Security System found on A20 SoC
-
-Required properties:
-- compatible : Should be "allwinner,sun4i-a10-crypto".
-- reg: Should contain the Security System register location and length.
-- interrupts: Should contain the IRQ line for the Security System.
-- clocks : List of clock specifiers, corresponding to ahb and ss.
-- clock-names : Name of the functional clock, should be
-	* "ahb" : AHB gating clock
-	* "mod" : SS controller clock
-
-Optional properties:
- - resets : phandle + reset specifier pair
- - reset-names : must contain "ahb"
-
-Example:
-	crypto: crypto-engine@1c15000 {
-		compatible = "allwinner,sun4i-a10-crypto";
-		reg = <0x01c15000 0x1000>;
-		interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&ahb_gates 5>, <&ss_clk>;
-		clock-names = "ahb", "mod";
-	};