linux-kernel - [PATCH 6/7] arm64: dts: rockchip: Add rng node to RK3588

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Message-Id: <20250130-rk3588-trng-submission-v1-6-97ff76568e49@collabora.com>
Date: Thu, 30 Jan 2025 17:31:20 +0100
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Philipp Zabel <p.zabel@...gutronix.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 Olivia Mackall <olivia@...enic.com>, 
 Herbert Xu <herbert@...dor.apana.org.au>, 
 Daniel Golle <daniel@...rotopia.org>, Aurelien Jarno <aurelien@...el32.net>
Cc: Sebastian Reichel <sebastian.reichel@...labora.com>, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-crypto@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 6/7] arm64: dts: rockchip: Add rng node to RK3588

Add the RK3588's standalone hardware random number generator node to its
device tree, and enable it on the one board I've tested it on and can
verify it produces good output, the Rock 5B.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-base.dtsi   | 9 +++++++++
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
index 8cfa30837ce72581d0b513a8274ab0177eb5ae15..1c72922bcbe1afd7c49beac771f8b7c6e5cc6e05 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
@@ -1921,6 +1921,15 @@ sdhci: mmc@...e0000 {
 		status = "disabled";
 	};
 
+	rng: rng@...78000 {
+		compatible = "rockchip,rk3588-rng";
+		reg = <0x0 0xfe378000 0x0 0x200>;
+		interrupts = <GIC_SPI 400 IRQ_TYPE_LEVEL_HIGH 0>;
+		clocks = <&scmi_clk SCMI_HCLK_SECURE_NS>;
+		resets = <&scmi_reset SCMI_SRST_H_TRNG_NS>;
+		status = "disabled";
+	};
+
 	i2s0_8ch: i2s@...70000 {
 		compatible = "rockchip,rk3588-i2s-tdm";
 		reg = <0x0 0xfe470000 0x0 0x1000>;
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
index d597112f1d5b8ee0b6a4fa17086c8671a5102583..00a915cf266202e26b274cab962f7bf6bcf76fc1 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
@@ -430,6 +430,10 @@ &pwm1 {
 	status = "okay";
 };
 
+&rng {
+	status = "okay";
+};
+
 &saradc {
 	vref-supply = <&avcc_1v8_s0>;
 	status = "okay";

-- 
2.48.1