From 8ba694e5b7fb5c9b516e59ef9cc6978a7de81b21 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Date: Mon, 27 Dec 2021 19:32:51 +0100
Subject: dt-bindings: rng: timeriomem_rng: convert TimerIO RNG to dtschema

Convert the TimerIO RNG bindings to DT schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211227183251.132525-8-krzysztof.kozlowski@canonical.com
---
 .../devicetree/bindings/rng/timeriomem_rng.yaml    | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rng/timeriomem_rng.yaml

(limited to 'Documentation/devicetree/bindings/rng/timeriomem_rng.yaml')

diff --git a/Documentation/devicetree/bindings/rng/timeriomem_rng.yaml b/Documentation/devicetree/bindings/rng/timeriomem_rng.yaml
new file mode 100644
index 000000000000..84bf518a5549
--- /dev/null
+++ b/Documentation/devicetree/bindings/rng/timeriomem_rng.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rng/timeriomem_rng.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TimerIO Random Number Generator
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+properties:
+  compatible:
+    const: timeriomem_rng
+
+  period:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: wait time in microseconds to use between samples
+
+  quality:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
+    description:
+      Estimated number of bits of true entropy per 1024 bits read from the rng.
+      Defaults to zero which causes the kernel's default quality to be used
+      instead.  Note that the default quality is usually zero which disables
+      using this rng to automatically fill the kernel's entropy pool.
+
+  reg:
+    maxItems: 1
+    description:
+      Base address to sample from. Currently 'reg' must be at least four bytes
+      wide and 32-bit aligned.
+
+required:
+  - compatible
+  - period
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    rng@44 {
+        compatible = "timeriomem_rng";
+        reg = <0x44 0x04>;
+        period = <1000000>;
+    };
-- 
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