linux-kernel - [PATCH 8/8] dt-bindings: rng: timeriomem_rng: convert TimerIO RNG to dtschema

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Message-Id: <20211227183251.132525-8-krzysztof.kozlowski@canonical.com>
Date:   Mon, 27 Dec 2021 19:32:51 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Khuong Dinh <khuong@...amperecomputing.com>,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Nishanth Menon <nm@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Pali Rohár <pali@...nel.org>,
        Tony Lindgren <tony@...mide.com>, linux-crypto@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, openbmc@...ts.ozlabs.org
Subject: [PATCH 8/8] 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@...onical.com>
---
 .../bindings/rng/timeriomem_rng.txt           | 25 ----------
 .../bindings/rng/timeriomem_rng.yaml          | 48 +++++++++++++++++++
 2 files changed, 48 insertions(+), 25 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/rng/timeriomem_rng.txt
 create mode 100644 Documentation/devicetree/bindings/rng/timeriomem_rng.yaml

diff --git a/Documentation/devicetree/bindings/rng/timeriomem_rng.txt b/Documentation/devicetree/bindings/rng/timeriomem_rng.txt
deleted file mode 100644
index fb4846160047..000000000000
--- a/Documentation/devicetree/bindings/rng/timeriomem_rng.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-HWRNG support for the timeriomem_rng driver
-
-Required properties:
-- compatible : "timeriomem_rng"
-- reg : base address to sample from
-- period : wait time in microseconds to use between samples
-
-Optional properties:
-- quality : 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.
-
-N.B. currently 'reg' must be at least four bytes wide and 32-bit aligned
-
-Example:
-
-hwrng@44 {
-	#address-cells = <1>;
-	#size-cells = <1>;
-	compatible = "timeriomem_rng";
-	reg = <0x44 0x04>;
-	period = <1000000>;
-};
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@...onical.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>;
+    };
-- 
2.32.0