linux-kernel - [PATCH v3 1/6] dt-bindings: crypto: Document support for SPAcc

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Message-Id: <20250602053231.403143-2-pavitrakumarm@vayavyalabs.com>
Date: Mon,  2 Jun 2025 11:02:26 +0530
From: Pavitrakumar Managutte <pavitrakumarm@...avyalabs.com>
To: linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	herbert@...dor.apana.org.au,
	robh@...nel.org
Cc: krzk+dt@...nel.org,
	conor+dt@...nel.org,
	Ruud.Derwig@...opsys.com,
	manjunath.hadli@...avyalabs.com,
	adityak@...avyalabs.com,
	Pavitrakumar Managutte <pavitrakumarm@...avyalabs.com>,
	Bhoomika Kadabi <bhoomikak@...avyalabs.com>
Subject: [PATCH v3 1/6] dt-bindings: crypto: Document support for SPAcc

Add DT bindings related to the SPAcc driver for Documentation.
DWC Synopsys Security Protocol Accelerator(SPAcc) Hardware Crypto
Engine is a crypto IP designed by Synopsys.

Co-developed-by: Bhoomika Kadabi <bhoomikak@...avyalabs.com>
Signed-off-by: Bhoomika Kadabi <bhoomikak@...avyalabs.com>
Signed-off-by: Pavitrakumar Managutte <pavitrakumarm@...avyalabs.com>
Acked-by: Ruud Derwig <Ruud.Derwig@...opsys.com>
---
 .../bindings/crypto/snps,dwc-spacc.yaml       | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/crypto/snps,dwc-spacc.yaml

diff --git a/Documentation/devicetree/bindings/crypto/snps,dwc-spacc.yaml b/Documentation/devicetree/bindings/crypto/snps,dwc-spacc.yaml
new file mode 100644
index 000000000000..2780b3db2182
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/snps,dwc-spacc.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/snps,dwc-spacc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare Security Protocol Accelerator(SPAcc) Crypto Engine
+
+maintainers:
+  - Ruud Derwig <Ruud.Derwig@...opsys.com>
+
+description: |
+  This binding describes the Synopsys DWC Security Protocol Accelerator (SPAcc),
+  which is a hardware IP designed to accelerate cryptographic operations, such
+  as encryption, decryption, and hashing.
+
+  The SPAcc supports virtualization where a single physical SPAcc can be
+  accessed as multiple virtual SPAcc instances, each with its own register set.
+  These virtual instances can be assigned different priorities.
+
+  In this configuration, the SPAcc IP is instantiated within the Synopsys
+  NSIMOSCI virtual SoC platform, a SystemC simulation environment used for
+  software development and testing. The device is accessed as a memory-mapped
+  peripheral and generates interrupts to the ARC interrupt controller.
+
+properties:
+  compatible:
+    items:
+      - const: snps,nsimosci-hs-spacc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  snps,vspacc-id:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Virtual SPAcc instance identifier.
+      The SPAcc hardware supports multiple virtual instances (determined by
+      ELP_SPACC_CONFIG_VSPACC_CNT parameter), and this ID is used to identify
+      which virtual instance this node represents.
+    minimum: 0
+    maximum: 7
+
+  snps,spacc-internal-counter:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Hardware counter that generates an interrupt based on a count value.
+      This counter starts ticking when there is a completed job sitting on
+      the status fifo to be serviced. This makes sure that no jobs are
+      starved of processing.
+    minimum: 0x19000
+    maximum: 0xFFFFF
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+
+    crypto@...00000 {
+        compatible = "snps,nsimosci-hs-spacc";
+        reg = <0x40000000 0x3FFFF>;
+        interrupts = <28>;
+        clocks = <&clock>;
+        snps,spacc-internal-counter = <0x20000>;
+        snps,vspacc-id = <0>;
+    };
-- 
2.25.1