[PATCH 4/5] arm64: dts: st: add TAMP backup register in stm32mp231.dtsi

[Patrice Chotard <patrice.chotard@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: Patrice Chotard <patrice.chotard@foss.st.com>
---
 arch/arm64/boot/dts/st/stm32mp231.dtsi | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp231.dtsi b/arch/arm64/boot/dts/st/stm32mp231.dtsi
index 9e1d240888ff..6d7c16e85d86 100644
--- a/arch/arm64/boot/dts/st/stm32mp231.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp231.dtsi
@@ -1102,6 +1102,36 @@ rtc: rtc@46000000 {
 			status = "disabled";
 		};
 
+		tamp: tamp@46010000 {
+			compatible = "st,stm32-tamp", "syscon", "simple-mfd";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x46010000 0x400>;
+			ranges;
+
+			nvram: nvram@46010100 {
+				compatible = "st,stm32mp25-tamp-nvram";
+				reg = <0x46010100 0x200>;
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					boot_mode: tamp-bkp@180 {
+						reg = <0x180 0x4>;
+					};
+
+					rsc_tbl_addr: tamp-bkp@184 {
+						reg = <0x184 0x4>;
+					};
+
+					rsc_tbl_size: tamp-bkp@188 {
+						reg = <0x188 0x4>;
+					};
+				};
+			};
+		};
+
 		pinctrl_z: pinctrl@46200000 {
 			compatible = "st,stm32mp257-z-pinctrl";
 			ranges = <0 0x46200000 0x400>;

-- 
2.43.0