[PATCH 1/5] ARM: dts: stm32: add TAMP backup register in stm32mp131.dtsi

[Patrice Chotard]

From: Simeon Marijon <simeon.marijon at foss.st.com>

TAMP backup registers allow information sharing between different
software components/execution levels.
They are described individually as nvmem cells.

Signed-off-by: Simeon Marijon <simeon.marijon at foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard at foss.st.com>
---
 arch/arm/boot/dts/st/stm32mp131.dtsi | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm/boot/dts/st/stm32mp131.dtsi b/arch/arm/boot/dts/st/stm32mp131.dtsi
index 83ae59b73dd0..b37c22b1379c 100644
--- a/arch/arm/boot/dts/st/stm32mp131.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp131.dtsi
@@ -1918,5 +1918,39 @@ gpioi: gpio at 5000a000 {
 				gpio-ranges = <&pinctrl 0 128 8>;
 			};
 		};
+
+		tamp: tamp at 5c00a000 {
+			compatible = "st,stm32-tamp", "syscon", "simple-mfd";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x5c00a000 0x400>;
+			ranges;
+
+			nvram: nvram at 5c00a100 {
+				compatible = "st,stm32mp15-tamp-nvram";
+				reg = <0x5c00a100 0x80>;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					saes_secret_key: tamp-bkp at 0 {
+						/* see saes secret key feature */
+						reg = <0x0 0x20>;
+					};
+
+					boot_mode: tamp-bkp at 78 {
+						/* see boot mode selection feature */
+						reg = <0x78 0x4>;
+					};
+
+					boot_counter: tamp-bkp at 7c {
+						/* see boot counter feature */
+						reg = <0x7c 0x4>;
+					};
+				};
+			};
+		};
 	};
 };

-- 
2.43.0