[PATCH 2/5] ARM: dts: stm32: add TAMP backup register in stm32mp151.dtsi

[Patrice Chotard <patrice.chotard@foss.st.com>]

From: Simeon Marijon <simeon.marijon@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@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
---
 arch/arm/boot/dts/st/stm32mp151.dtsi | 82 ++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)

diff --git a/arch/arm/boot/dts/st/stm32mp151.dtsi b/arch/arm/boot/dts/st/stm32mp151.dtsi
index 84f68e8563d8..0ad75e010839 100644
--- a/arch/arm/boot/dts/st/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp151.dtsi
@@ -2060,7 +2060,89 @@ i2c6: i2c@5c009000 {
 
 		tamp: tamp@5c00a000 {
 			compatible = "st,stm32-tamp", "syscon", "simple-mfd";
+			#address-cells = <1>;
+			#size-cells = <1>;
 			reg = <0x5c00a000 0x400>;
+			ranges;
+
+			nvram: nvram@5c00a100 {
+				compatible = "st,stm32mp15-tamp-nvram";
+				reg = <0x5c00a100 0x80>;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+					wakeup_sec: tamp-bkp@0 {
+						reg = <0x0 0x4>;
+					};
+
+					m4_security_perimeter_exti1: tamp-bkp@4 {
+						/* see cortex-m4 wake up feature */
+						reg = <0x4 0x4>;
+					};
+
+					m4_security_perimeter_exti2: tamp-bkp@8 {
+						/* see cortex-m4 wake up feature */
+						reg = <0x8 0x4>;
+					};
+
+					m4_security_perimeter_exti3: tamp-bkp@c {
+						/* see cortex-m4 wtake up feature */
+						reg = <0xc 0x4>;
+					};
+
+					magic_number: tamp-bkp@10 {
+						/* see ddr and cpu wake up management feature */
+						reg = <0x10 0x4>;
+					};
+
+					branch_address: tamp-bkp@14 {
+						/* see ddr and cpu wake up management feature */
+						reg = <0x14 0x4>;
+					};
+
+					fwu_info: tamp-bkp@28 {
+						/* see firmware update info feature */
+						reg = <0x28 0x4>;
+					};
+
+					copro_rsc_tbl_address: tamp-bkp@44 {
+						/* see cortex-m4 management feature */
+						reg = <0x44 0x4>;
+					};
+
+					cortex_m_state: tamp-bkp@48 {
+						/* see cortex-m4 management feature */
+						reg = <0x48 0x4>;
+					};
+
+					boot_mode: tamp-bkp@50 {
+						/* see boot mode selection feature */
+						reg = <0x50 0x4>;
+					};
+
+					boot_counter: tamp-bkp@54 {
+						/* see boot counter feature */
+						reg = <0x54 0x4>;
+					};
+
+					m4_wakeup_area_start: tamp-bkp@58 {
+						/* see cortex-m4 wake up feature */
+						reg = <0x58 0x4>;
+					};
+
+					m4_wakeup_area_length: tamp-bkp@5c {
+						/* see cortex-m4 wake up feature */
+						reg = <0x5c 0x4>;
+					};
+
+					m4_wakeup_area_hash: tamp-bkp@60 {
+						/* SHA-0x100 value see Cortex-M4 wake up feature */
+						reg = <0x60 0x20>;
+					};
+				};
+			};
 		};
 
 		/*

-- 
2.43.0