linux-kernel - [PATCH v6 2/3] dt-bindings: crypto: Add Inside Secure SafeXcel EIP-93 crypto engine

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Message-ID: <20241102175045.10408-2-ansuelsmth@gmail.com>
Date: Sat,  2 Nov 2024 18:50:34 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Christian Marangi <ansuelsmth@...il.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Antoine Tenart <atenart@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will@...nel.org>,
	Waiman Long <longman@...hat.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	linux-crypto@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev,
	upstream@...oha.com
Subject: [PATCH v6 2/3] dt-bindings: crypto: Add Inside Secure SafeXcel EIP-93 crypto engine

Add bindings for the Inside Secure SafeXcel EIP-93 crypto engine.

The IP is present on Airoha SoC and on various Mediatek devices and
other SoC under different names like mtk-eip93 or PKTE.

All the compatible that currently doesn't have any user are defined but
rejected waiting for an actual device that makes use of them.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
Changes v6:
- Add SoC specific compatible
- Add now supported entry for compatible with no user
Changes v5:
- Comment out compatible with no current user
Changes v4:
- Out of RFC
Changes v3:
- Add SoC compatible with generic one
Changes v2:
- Change to better compatible
- Add description for EIP93 models

 .../crypto/inside-secure,safexcel-eip93.yaml  | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/crypto/inside-secure,safexcel-eip93.yaml

diff --git a/Documentation/devicetree/bindings/crypto/inside-secure,safexcel-eip93.yaml b/Documentation/devicetree/bindings/crypto/inside-secure,safexcel-eip93.yaml
new file mode 100644
index 000000000000..997bf9717f9e
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/inside-secure,safexcel-eip93.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/inside-secure,safexcel-eip93.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Inside Secure SafeXcel EIP-93 cryptographic engine
+
+maintainers:
+  - Christian Marangi <ansuelsmth@...il.com>
+
+description: |
+  The Inside Secure SafeXcel EIP-93 is a cryptographic engine IP block
+  integrated in varios devices with very different and generic name from
+  PKTE to simply vendor+EIP93. The real IP under the hood is actually
+  developed by Inside Secure and given to license to vendors.
+
+  The IP block is sold with different model based on what feature are
+  needed and are identified with the final letter. Each letter correspond
+  to a specific set of feature and multiple letter reflect the sum of the
+  feature set.
+
+  EIP-93 models:
+    - EIP-93i: (basic) DES/Triple DES, AES, PRNG, IPsec ESP, SRTP, SHA1
+    - EIP-93ie: i + SHA224/256, AES-192/256
+    - EIP-93is: i + SSL/DTLS/DTLS, MD5, ARC4
+    - EIP-93ies: i + e + s
+    - EIP-93iw: i + AES-XCB-MAC, AES-CCM
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: airoha,en7581-eip93
+          - const: inside-secure,safexcel-eip93ies
+      - items:
+          - not: {}
+            description: Need a SoC specific compatible
+          - enum:
+              - inside-secure,safexcel-eip93i
+              - inside-secure,safexcel-eip93ie
+              - inside-secure,safexcel-eip93is
+              - inside-secure,safexcel-eip93iw
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    crypto@...04000 {
+      compatible = "airoha,en7581-eip93", "inside-secure,safexcel-eip93ies";
+      reg = <0x1fb70000 0x1000>;
+
+      interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
+    };
-- 
2.45.2