pm: refactor PM_S2RAM_CUSTOM_MARKING option to be promptless

The config PM_S2RAM_CUSTOM_MARKING is not an optional config for a
user to select, it is required by some soc implementations of S2RAM,
in which case it must be selected by the soc.

Refactor the configuration to be HAS_PM_S2RAM_CUSTOM_MARKING, and
make the currently only soc which needs it select it. Then update
samples which previously had to select this option for this soc.

Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>

arch/arm/core/cortex_m/pm_s2ram.c

@@ -28,7 +28,7 @@ __noinit
 #endif
 _cpu_context_t _cpu_context;
 
-#ifndef CONFIG_PM_S2RAM_CUSTOM_MARKING
+#ifndef CONFIG_HAS_PM_S2RAM_CUSTOM_MARKING
 /**
  * S2RAM Marker
  */
@@ -50,4 +50,4 @@ bool pm_s2ram_mark_check_and_clear(void)
 	return false;
 }
 
-#endif /* CONFIG_PM_S2RAM_CUSTOM_MARKING */
+#endif /* CONFIG_HAS_PM_S2RAM_CUSTOM_MARKING */

include/zephyr/arch/common/pm_s2ram.h

@@ -63,8 +63,8 @@ int arch_pm_s2ram_suspend(pm_s2ram_system_off_fn_t system_off);
  * Function is called when system state is stored to RAM, just before going to system
  * off.
  *
- * Default implementation is setting a magic word in RAM. CONFIG_PM_S2RAM_CUSTOM_MARKING
- * allows custom implementation.
+ * Default implementation is setting a magic word in RAM used if
+ * CONFIG_HAS_PM_S2RAM_CUSTOM_MARKING is not set.
  */
 void pm_s2ram_mark_set(void);
 
@@ -74,8 +74,8 @@ void pm_s2ram_mark_set(void);
  * Function is used to determine if resuming after suspend-to-RAM shall be performed
  * or standard boot code shall be executed.
  *
- * Default implementation is checking a magic word in RAM. CONFIG_PM_S2RAM_CUSTOM_MARKING
- * allows custom implementation.
+ * Default implementation is checking a magic word in RAM used if
+ * CONFIG_HAS_PM_S2RAM_CUSTOM_MARKING is not set.
  *
  * @retval true if marking is found which indicates resuming after suspend-to-RAM.
  * @retval false if marking is not found which indicates standard boot.

samples/boards/nordic/spis_wakeup/prj.conf

@@ -3,7 +3,6 @@ CONFIG_SPI_SLAVE=y
 CONFIG_GPIO=y
 
 CONFIG_PM=y
-CONFIG_PM_S2RAM_CUSTOM_MARKING=y
 CONFIG_PM_DEVICE=y
 CONFIG_PM_DEVICE_RUNTIME=y
 

samples/boards/nordic/spis_wakeup/wakeup_trigger/prj.conf

@@ -3,7 +3,6 @@ CONFIG_SPI_NRFX_WAKE_TIMEOUT_US=500
 CONFIG_GPIO=y
 
 CONFIG_PM=y
-CONFIG_PM_S2RAM_CUSTOM_MARKING=y
 CONFIG_PM_DEVICE=y
 CONFIG_PM_DEVICE_RUNTIME=y
 

soc/nordic/nrf54h/Kconfig

@@ -35,6 +35,7 @@ config SOC_NRF54H20_CPUAPP_COMMON
 	select NRFS_HAS_TEMP_SERVICE
 	select NRFS_HAS_VBUS_DETECTOR_SERVICE
 	select HAS_PM
+	select HAS_PM_S2RAM_CUSTOM_MARKING
 	select HAS_POWEROFF
 
 config SOC_NRF54H20_CPUAPP
@@ -64,6 +65,7 @@ config SOC_NRF54H20_CPURAD_COMMON
 	select HAS_NORDIC_DMM
 	select HAS_NORDIC_RAM_CTRL
 	select HAS_PM
+	select HAS_PM_S2RAM_CUSTOM_MARKING
 	select HAS_POWEROFF
 
 config SOC_NRF54H20_TDD_ENABLE

subsys/pm/Kconfig

@@ -10,6 +10,14 @@ config HAS_PM
 	  This option must be selected by SoCs that provide PM hooks, that is,
 	  calls to configure low-power states.
 
+config HAS_PM_S2RAM_CUSTOM_MARKING
+	bool
+	depends on HAS_PM
+	help
+	  By default a magic word in RAM is used to mark entering suspend-to-RAM. If this
+	  option is selected, a custom implementation of functions which handle the marking
+	  must be provided.
+
 config PM
 	bool "System Power Management"
 	depends on SYS_CLOCK_EXISTS && HAS_PM
@@ -45,13 +53,6 @@ config PM_S2RAM
 	  sleep states if PM is enabled and one or more suspend-to-ram sleep states are
 	  enabled in the devicetree.
 
-config PM_S2RAM_CUSTOM_MARKING
-	bool "Use custom marking functions"
-	depends on PM_S2RAM
-	help
-	  By default a magic word in RAM is used to mark entering suspend-to-RAM. Enabling
-	  this option allows custom implementation of functions which handle the marking.
-
 config PM_NEED_ALL_DEVICES_IDLE
 	bool "System Low Power Mode Needs All Devices Idle"
 	depends on PM_DEVICE && !SMP