From: Rick Altherr <raltherr@google.com>
To: linux-crypto@vger.kernel.org
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Rob Herring <robh+dt@kernel.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
Mark Rutland <mark.rutland@arm.com>,
Matt Mackall <mpm@selenic.com>
Subject: [PATCH v2 1/2] dt-bindings: timeriomem_rng: Add entropy quality property
Date: Mon, 22 May 2017 14:12:23 -0700 [thread overview]
Message-ID: <20170522211224.12202-1-raltherr@google.com> (raw)
Signed-off-by: Rick Altherr <raltherr@google.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
next reply other threads:[~2017-05-22 21:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-22 21:12 Rick Altherr [this message]
2017-05-22 21:12 ` [PATCH v2 2/2] hw_random: timeriomem_rng: Allow setting RNG quality from platform data Rick Altherr
2017-06-01 5:07 ` [PATCH v2 1/2] dt-bindings: timeriomem_rng: Add entropy quality property Herbert Xu
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