[PATCH 2/3] crypto: ixp4xx: Add DT bindings

[Linus Walleij <linus.walleij@linaro.org>]

This adds device tree bindings for the ixp4xx crypto engine.

Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Herbert, David: This can be applied separately once we are
happy with the bindings, alternatively it can be merged
with the support code into ARM SoC.
---
 .../bindings/crypto/intel,ixp4xx-crypto.yaml  | 59 +++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/crypto/intel,ixp4xx-crypto.yaml

diff --git a/Documentation/devicetree/bindings/crypto/intel,ixp4xx-crypto.yaml b/Documentation/devicetree/bindings/crypto/intel,ixp4xx-crypto.yaml
new file mode 100644
index 000000000000..28d75f4f9a76
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/intel,ixp4xx-crypto.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2018 Linaro Ltd.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/crypto/intel,ixp4xx-crypto.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Intel IXP4xx cryptographic engine
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description: |
+  The Intel IXP4xx cryptographic engine makes use of the IXP4xx NPE
+  (Network Processing Engine). Since it is not a device on its own
+  it is defined as a subnode of the NPE, if crypto support is
+  available on the platform.
+
+properties:
+  compatible:
+    const: intel,ixp4xx-crypto
+
+  intel,npe-handle:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    maxItems: 1
+    description: phandle to the NPE this ethernet instance is using
+      and the instance to use in the second cell
+
+  queue-rx:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    maxItems: 1
+    description: phandle to the RX queue on the NPE
+
+  queue-txready:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    maxItems: 1
+    description: phandle to the TX READY queue on the NPE
+
+required:
+  - compatible
+  - intel,npe-handle
+  - queue-rx
+  - queue-txready
+
+additionalProperties: false
+
+examples:
+  - |
+    npe: npe@c8006000 {
+         compatible = "intel,ixp4xx-network-processing-engine";
+         reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;
+
+         crypto {
+             compatible = "intel,ixp4xx-crypto";
+             intel,npe-handle = <&npe 2>;
+             queue-rx = <&qmgr 30>;
+             queue-txready = <&qmgr 29>;
+         };
+    };
-- 
2.30.2