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Message-Id: <20230828-topic-sm8550-rng-v3-2-7a0678ca7988@linaro.org>
Date: Mon, 28 Aug 2023 10:04:37 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Vinod Koul <vkoul@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-crypto@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Neil Armstrong <neil.armstrong@...aro.org>,
Om Prakash Singh <quic_omprsing@...cinc.com>
Subject: [PATCH v3 2/6] dt-bindings: crypto: qcom,prng: document that RNG
on SM8450 is a TRNG
It has been reported at [1] the RNG HW on SM8450 is in fact a True Random
Number Generator and no more Pseudo, document this by adding
a new qcom,trng and the corresponding SoC specific sm8450 compatible.
[1] https://lore.kernel.org/all/20230818161720.3644424-1-quic_omprsing@quicinc.com/
Suggested-by: Om Prakash Singh <quic_omprsing@...cinc.com>
Suggested-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Reviewed-by: Om Prakash Singh <quic_omprsing@...cinc.com>
Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
.../devicetree/bindings/crypto/qcom,prng.yaml | 24 +++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/crypto/qcom,prng.yaml b/Documentation/devicetree/bindings/crypto/qcom,prng.yaml
index bb42f4588b40..4245c9e424a3 100644
--- a/Documentation/devicetree/bindings/crypto/qcom,prng.yaml
+++ b/Documentation/devicetree/bindings/crypto/qcom,prng.yaml
@@ -11,9 +11,13 @@ maintainers:
properties:
compatible:
- enum:
- - qcom,prng # 8916 etc.
- - qcom,prng-ee # 8996 and later using EE
+ oneOf:
+ - enum:
+ - qcom,prng # 8916 etc.
+ - qcom,prng-ee # 8996 and later using EE
+ - items:
+ - const: qcom,sm8450-trng
+ - const: qcom,trng
reg:
maxItems: 1
@@ -28,8 +32,18 @@ properties:
required:
- compatible
- reg
- - clocks
- - clock-names
+
+allOf:
+ - if:
+ not:
+ properties:
+ compatible:
+ contains:
+ const: qcom,trng
+ then:
+ required:
+ - clocks
+ - clock-names
additionalProperties: false
--
2.34.1
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