ARM: dts: stm32: update stm32mp151 for remote proc synchronization support

Two backup registers are used to store the Cortex-M4 state and the resource
table address.
Declare the tamp node and add associated properties in m4_rproc node
to allow Linux to attach to a firmware loaded by the first boot stages.

Associated driver implementation is available in commit 9276536f455b3
("remoteproc: stm32: Parse syscon that will manage M4 synchronisation").

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
index b95c46c..a333c63 100644 (file)
--- a/arch/arm/boot/dts/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/stm32mp151.dtsi
@@ -1573,6 +1573,11 @@
                        status = "disabled";
                };
 
+               tamp: tamp@5c00a000 {
+                       compatible = "st,stm32-tamp", "syscon";
+                       reg = <0x5c00a000 0x400>;
+               };
+
                /*
                 * Break node order to solve dependency probe issue between
                 * pinctrl and exti.
@@ -1749,6 +1754,8 @@
                        st,syscfg-holdboot = <&rcc 0x10C 0x1>;
                        st,syscfg-tz = <&rcc 0x000 0x1>;
                        st,syscfg-pdds = <&pwr_mcu 0x0 0x1>;
+                       st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
+                       st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;
                        status = "disabled";
                };
        };