[PATCH v5 8/8] arm64: dts: st: add TAMP backup register in stm32mp251.dtsi

[Patrice Chotard]

From: Simeon Marijon <simeon.marijon@xxxxxxxxxxx>

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@xxxxxxxxxxx>
Signed-off-by: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/st/stm32mp251.dtsi | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index dac3d2d23ff0..9748834ae9de 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -2242,6 +2242,37 @@ 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 {
 			#address-cells = <1>;
 			#size-cells = <1>;

-- 
2.43.0