linux-kernel - [PATCH v2 1/2] dt-bindings: timeriomem

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Message-Id: <20170522211224.12202-1-raltherr@google.com>
Date:   Mon, 22 May 2017 14:12:23 -0700
From:   Rick Altherr <raltherr@...gle.com>
To:     linux-crypto@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Mark Rutland <mark.rutland@....com>,
        Matt Mackall <mpm@...enic.com>
Subject: [PATCH v2 1/2] dt-bindings: timeriomem_rng: Add entropy quality property

Signed-off-by: Rick Altherr <raltherr@...gle.com>
---

Changes in v2: None

 Documentation/devicetree/bindings/rng/timeriomem_rng.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/rng/timeriomem_rng.txt b/Documentation/devicetree/bindings/rng/timeriomem_rng.txt
index 6616d15866a3..214940093b55 100644
--- a/Documentation/devicetree/bindings/rng/timeriomem_rng.txt
+++ b/Documentation/devicetree/bindings/rng/timeriomem_rng.txt
@@ -5,6 +5,13 @@ Required properties:
 - 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 four bytes wide and aligned
 
 Example:
-- 
2.13.0.303.g4ebf302169-goog