linux-kernel - [PATCH 2/3] arm64: dts: rockchip: Enable OTP controller for RK356x

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Message-ID: <20260205212347.490636-3-heiko@sntech.de>
Date: Thu,  5 Feb 2026 22:23:46 +0100
From: Heiko Stuebner <heiko@...ech.de>
To: heiko@...ech.de
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	kever.yang@...k-chips.com,
	finley.xiao@...k-chips.com,
	w@....eu,
	jonas@...boo.se
Subject: [PATCH 2/3] arm64: dts: rockchip: Enable OTP controller for RK356x

Enable the One Time Programmable Controller (OTPC) in RK356x and add
an initial nvmem fixed layout.

Signed-off-by: Heiko Stuebner <heiko@...ech.de>
---
 arch/arm64/boot/dts/rockchip/rk356x-base.dtsi | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
index 8893b7b6cc9f..72c98337f359 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
@@ -1104,6 +1104,52 @@ rng: rng@...88000 {
 		status = "disabled";
 	};
 
+	otp: otp@...8c000 {
+		compatible = "rockchip,rk3568-otp";
+		reg = <0x0 0xfe38c000 0x0 0x4000>;
+		clocks = <&cru CLK_OTPC_NS_USR>, <&cru PCLK_OTPC_NS>,
+			 <&cru PCLK_OTPPHY>, <&cru CLK_OTPC_NS_SBPI>;
+		clock-names = "otp", "apb_pclk", "phy", "sbpi";
+		resets = <&cru SRST_OTPC_NS_USR>, <&cru SRST_P_OTPC_NS>,
+			 <&cru SRST_OTPPHY>, <&cru SRST_OTPC_NS_SBPI>;
+		reset-names = "otp", "apb", "phy", "sbpi";
+
+		nvmem-layout {
+			compatible = "fixed-layout";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			cpu_code: cpu-code@2 {
+				reg = <0x02 0x2>;
+			};
+
+			otp_cpu_version: cpu-version@8 {
+				reg = <0x08 0x1>;
+				bits = <3 3>;
+			};
+
+			otp_id: id@a {
+				reg = <0x0a 0x10>;
+			};
+
+			cpu_leakage: cpu-leakage@1a {
+				reg = <0x1a 0x1>;
+			};
+
+			log_leakage: log-leakage@1b {
+				reg = <0x1b 0x1>;
+			};
+
+			npu_leakage: npu-leakage@1c {
+				reg = <0x1c 0x1>;
+			};
+
+			gpu_leakage: gpu-leakage@1d {
+				reg = <0x1d 0x1>;
+			};
+		};
+	};
+
 	i2s0_8ch: i2s@...00000 {
 		compatible = "rockchip,rk3568-i2s-tdm";
 		reg = <0x0 0xfe400000 0x0 0x1000>;
-- 
2.47.2