linux-kernel - [PATCH 1/2] dt-bindings: rng: add support for Airoha EN7581 TRNG

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Message-ID: <20241016151845.23712-1-ansuelsmth@gmail.com>
Date: Wed, 16 Oct 2024 17:18:41 +0200
From: Christian Marangi <ansuelsmth@...il.com>
To: Olivia Mackall <olivia@...enic.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Christian Marangi <ansuelsmth@...il.com>,
	Francesco Dolcini <francesco.dolcini@...adex.com>,
	Daniel Golle <daniel@...rotopia.org>,
	Aurelien Jarno <aurelien@...el32.net>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-crypto@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	upstream@...oha.com
Subject: [PATCH 1/2] dt-bindings: rng: add support for Airoha EN7581 TRNG

Add support for Airoha EN7581 True Random Number generator.

This module can generate up to 4bytes of raw data at times and support
self health test at startup. The module gets noise for randomness from
various source from ADC, AP, dedicated clocks and other devices attached
to the SoC producing true random numbers.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 .../bindings/rng/airoha,en7581-trng.yaml      | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml

diff --git a/Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml b/Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml
new file mode 100644
index 000000000000..dfc6d24ee7d9
--- /dev/null
+++ b/Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rng/airoha,en7581-trng.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha EN7851 True Random Number Generator
+
+maintainers:
+  - Christian Marangi <ansuelsmth@...il.com>
+
+properties:
+  compatible:
+    const: airoha,en7581-trng
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    rng@...a1000 {
+        compatible = "airoha,en7581-trng";
+        reg = <0x1faa1000 0x1000>;
+        interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+    };
-- 
2.45.2