linux-kernel - [PATCH 1/2] arm64: dts: st: add bsec support to stm32mp21

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Message-ID: <20260211-upstream_stm32mp21_bsec_nodes-v1-1-8379bf97b0bc@foss.st.com>
Date: Wed, 11 Feb 2026 14:55:01 +0100
From: Patrice Chotard <patrice.chotard@...s.st.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Maxime Coquelin
	<mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>
CC: <devicetree@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	Patrice Chotard <patrice.chotard@...s.st.com>
Subject: [PATCH 1/2] arm64: dts: st: add bsec support to stm32mp21

Add BSEC support to STM32MP21 SoC family with SoC information:
- RPN = Device part number (BSEC_OTP_DATA9)
- PKG = package data register (Bits 2:0 of BSEC_OTP_DATA122)

Signed-off-by: Patrice Chotard <patrice.chotard@...s.st.com>
---
 arch/arm64/boot/dts/st/stm32mp211.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp211.dtsi b/arch/arm64/boot/dts/st/stm32mp211.dtsi
index cd078a16065e..4bfd58b26b51 100644
--- a/arch/arm64/boot/dts/st/stm32mp211.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp211.dtsi
@@ -112,6 +112,22 @@ usart2: serial@...e0000 {
 			};
 		};
 
+		bsec: efuse@...00000 {
+			compatible = "st,stm32mp25-bsec";
+			reg = <0x44000000 0x0 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			part_number_otp@24 {
+				reg = <0x24 0x4>;
+			};
+
+			package_otp@1e8 {
+				reg = <0x1e8 0x1>;
+				bits = <0 3>;
+			};
+		};
+
 		syscfg: syscon@...30000 {
 			compatible = "st,stm32mp21-syscfg", "syscon";
 			reg = <0x44230000 0x0 0x10000>;

-- 
2.43.0