linux-kernel - [PATCH v2 10/10] ARM: dts: stm32: add RNG node for STM32MP13x platforms

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Message-ID: <20230911120203.774632-11-gatien.chevallier@foss.st.com>
Date:   Mon, 11 Sep 2023 14:02:03 +0200
From:   Gatien Chevallier <gatien.chevallier@...s.st.com>
To:     Olivia Mackall <olivia@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
CC:     Lionel Debieve <lionel.debieve@...s.st.com>,
        <linux-crypto@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Gatien Chevallier <gatien.chevallier@...s.st.com>
Subject: [PATCH v2 10/10] ARM: dts: stm32: add RNG node for STM32MP13x platforms

The RNG on STM32MP13 offers upgrades like customization of its
configuration and the conditional reset.

The hardware RNG should be managed in the secure world for but it
is supported on Linux. Therefore, is it not default enabled.

Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
---
 arch/arm/boot/dts/st/stm32mp131.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/st/stm32mp131.dtsi b/arch/arm/boot/dts/st/stm32mp131.dtsi
index ac90fcbf0c09..39db82b782eb 100644
--- a/arch/arm/boot/dts/st/stm32mp131.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp131.dtsi
@@ -1220,6 +1220,14 @@ mdma: dma-controller@...00000 {
 			dma-requests = <48>;
 		};
 
+		rng: rng@...04000 {
+			compatible = "st,stm32mp13-rng";
+			reg = <0x54004000 0x400>;
+			clocks = <&rcc RNG1_K>;
+			resets = <&rcc RNG1_R>;
+			status = "disabled";
+		};
+
 		fmc: memory-controller@...02000 {
 			compatible = "st,stm32mp1-fmc2-ebi";
 			reg = <0x58002000 0x1000>;
-- 
2.25.1