dt-bindings: crypto: add documentation for aspeed hace

Add device tree binding documentation for the Aspeed Hash
and Crypto Engines (HACE) Controller.

Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
Signed-off-by: Johnny Huang <johnny_huang@aspeedtech.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/devicetree/bindings/crypto/aspeed,ast2500-hace.yaml

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/aspeed,ast2500-hace.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED HACE hash and crypto Hardware Accelerator Engines
+
+maintainers:
+  - Neal Liu <neal_liu@aspeedtech.com>
+
+description: |
+  The Hash and Crypto Engine (HACE) is designed to accelerate the throughput
+  of hash data digest, encryption, and decryption. Basically, HACE can be
+  divided into two independently engines - Hash Engine and Crypto Engine.
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2500-hace
+      - aspeed,ast2600-hace
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/ast2600-clock.h>
+    hace: crypto@1e6d0000 {
+        compatible = "aspeed,ast2600-hace";
+        reg = <0x1e6d0000 0x200>;
+        interrupts = <4>;
+        clocks = <&syscon ASPEED_CLK_GATE_YCLK>;
+        resets = <&syscon ASPEED_RESET_HACE>;
+    };