linux-kernel - [PATCH v2 7/7] arm64: dts: qcom: sc8280xp: add rng device tree node

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Message-Id: <20221214171145.2913557-8-bmasney@redhat.com>
Date:   Wed, 14 Dec 2022 12:11:45 -0500
From:   Brian Masney <bmasney@...hat.com>
To:     andersson@...nel.org, krzysztof.kozlowski+dt@...aro.org
Cc:     quic_shazhuss@...cinc.com, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, johan+linaro@...nel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ahalaney@...hat.com,
        echanude@...hat.com
Subject: [PATCH v2 7/7] arm64: dts: qcom: sc8280xp: add rng device tree node

Add the necessary device tree node for qcom,prng-ee so we can use the
hardware random number generator. This functionality was tested on a
SA8540p automotive development board using kcapi-rng from libkcapi.

Signed-off-by: Brian Masney <bmasney@...hat.com>
---
This is a new patch that's introduced in v2.

 arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index 4591d411f5fb..67765975361b 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -2811,6 +2811,13 @@ tlmm: pinctrl@...0000 {
 			gpio-ranges = <&tlmm 0 0 230>;
 		};
 
+		rng: rng@...3000 {
+			compatible = "qcom,prng-ee";
+			reg = <0 0x010d3000 0 0x1000>;
+			clocks = <&rpmhcc RPMH_HWKM_CLK>;
+			clock-names = "core";
+		};
+
 		apps_smmu: iommu@...00000 {
 			compatible = "qcom,sc8280xp-smmu-500", "arm,mmu-500";
 			reg = <0 0x15000000 0 0x100000>;
-- 
2.38.1