samples: drivers: mbox: add support for nrf54h20dk cpuapp<>cpuflpr

Add support for testing IPC between cpuapp<>cpuflpr. Some adjustments
have been done to be able to support two different remote targets for
the nrf54h20dk cpuapp.

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

samples/drivers/mbox/Kconfig.sysbuild

@@ -6,7 +6,7 @@
 source "share/sysbuild/Kconfig"
 
 config REMOTE_BOARD
-string
+	string "Remote board"
 	default "nrf5340dk/nrf5340/cpunet" if $(BOARD) = "nrf5340dk"
 	default "nrf5340bsim/nrf5340/cpunet" if $(BOARD_TARGET_STRING) = "NRF5340BSIM_NRF5340_CPUAPP"
 	default "adp_xc7k/ae350" if $(BOARD) = "adp_xc7k"
@@ -14,7 +14,6 @@ string
 	default "mimxrt1170_evk/mimxrt1176/cm4" if $(BOARD) = "mimxrt1170_evk"
 	default "mimxrt1160_evk/mimxrt1166/cm4" if $(BOARD) = "mimxrt1160_evk"
 	default "lpcxpresso55s69/lpc55s69/cpu1" if $(BOARD) = "lpcxpresso55s69"
-	default "nrf54h20dk/nrf54h20/cpuppr" if "$(BOARD)${BOARD_QUALIFIERS}" = "nrf54h20dk/nrf54h20/cpuapp"
 	default "nrf54h20dk/nrf54h20/cpuapp" if "$(BOARD)${BOARD_QUALIFIERS}" = "nrf54h20dk/nrf54h20/cpurad"
 	default "nrf54l15pdk/nrf54l15/cpuflpr" if $(BOARD) = "nrf54l15pdk"
 	default "stm32h747i_disco/stm32h747xx/m4" if $(BOARD) = "stm32h747i_disco"

samples/drivers/mbox/boards/nrf54h20dk_nrf54h20_cpuapp_cpuflpr.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2024 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	mbox-consumer {
+		compatible = "vnd,mbox-consumer";
+		mboxes = <&cpuflpr_vevif 16>, <&cpuapp_bellboard 14>;
+		mbox-names = "tx", "rx";
+	};
+};
+
+&cpuapp_bellboard {
+	status = "okay";
+};
+
+&cpuflpr_vevif {
+	status = "okay";
+};

samples/drivers/mbox/remote/CMakeLists.txt

@@ -16,6 +16,7 @@ if(CONFIG_BOARD_NRF5340DK_NRF5340_CPUNET OR
    CONFIG_BOARD_MIMXRT1160_EVK_MIMXRT1166_CM4 OR
    CONFIG_BOARD_LPCXPRESSO55S69_LPC55S69_CPU1 OR
    CONFIG_BOARD_NRF54H20DK_NRF54H20_CPUPPR OR
+   CONFIG_BOARD_NRF54H20DK_NRF54H20_CPUFLPR OR
    CONFIG_BOARD_NRF54H20DK_NRF54H20_CPUAPP OR
    CONFIG_BOARD_NRF54L15PDK_NRF54L15_CPUFLPR OR
    CONFIG_BOARD_NRF54L15PDK_NRF54L15_CPUFLPR_XIP OR

samples/drivers/mbox/remote/boards/nrf54h20dk_nrf54h20_cpuflpr.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2024 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	mbox-consumer {
+		compatible = "vnd,mbox-consumer";
+		mboxes = <&cpuflpr_vevif 16>, <&cpuapp_bellboard 14>;
+		mbox-names = "rx", "tx";
+	};
+};
+
+&cpuapp_bellboard {
+	status = "okay";
+};
+
+&cpuflpr_vevif {
+	status = "okay";
+};

samples/drivers/mbox/sample.yaml

@@ -29,6 +29,8 @@ tests:
       - nrf54h20dk/nrf54h20/cpuapp
     extra_args:
       mbox_SNIPPET=nordic-ppr
+      mbox_EXTRA_DTC_OVERLAY_FILE="boards/nrf54h20dk_nrf54h20_cpuapp_cpuppr.overlay"
+      SB_CONF_FILE=sysbuild/nrf54h20dk_nrf54h20_cpuppr.conf
     sysbuild: true
     harness: console
     harness_config:
@@ -38,6 +40,24 @@ tests:
         - "Ping \\(on channel 15\\)"
         - "Pong \\(on channel 18\\)"
 
+  sample.drivers.mbox.nrf54h20_app_flpr:
+    platform_allow:
+      - nrf54h20dk/nrf54h20/cpuapp
+    integration_platforms:
+      - nrf54h20dk/nrf54h20/cpuapp
+    extra_args:
+      mbox_SNIPPET=nordic-flpr
+      mbox_EXTRA_DTC_OVERLAY_FILE="boards/nrf54h20dk_nrf54h20_cpuapp_cpuflpr.overlay"
+      SB_CONF_FILE=sysbuild/nrf54h20dk_nrf54h20_cpuflpr.conf
+    sysbuild: true
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: false
+      regex:
+        - "Ping \\(on channel 16\\)"
+        - "Pong \\(on channel 18\\)"
+
   sample.drivers.mbox.nrf54h20_rad_app:
     platform_allow:
       - nrf54h20dk/nrf54h20/cpurad

samples/drivers/mbox/sysbuild/nrf54h20dk_nrf54h20_cpuflpr.conf

@@ -0,0 +1 @@
+SB_CONFIG_REMOTE_BOARD="nrf54h20dk/nrf54h20/cpuflpr"

samples/drivers/mbox/sysbuild/nrf54h20dk_nrf54h20_cpuppr.conf

@@ -0,0 +1 @@
+SB_CONFIG_REMOTE_BOARD="nrf54h20dk/nrf54h20/cpuppr"