samples: peripheral_power_profiling: Add console suspend in system_off

Added console suspend before `sys_poweroff` to reduce power usage.

Ref: NCSDK-29688

Signed-off-by: Marcin Jelinski <[email protected]>

Author: maje-emb

samples/bluetooth/peripheral_power_profiling/prj.conf

@@ -4,8 +4,6 @@
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
 
-CONFIG_NCS_SAMPLES_DEFAULTS=y
-
 CONFIG_BT=y
 CONFIG_BT_SMP=y
 CONFIG_BT_PERIPHERAL=y
@@ -31,5 +29,9 @@ CONFIG_FLASH_PAGE_LAYOUT=y
 CONFIG_FLASH_MAP=y
 
 CONFIG_POWEROFF=y
+CONFIG_PM_DEVICE=y
 
 CONFIG_MAIN_STACK_SIZE=2048
+
+CONFIG_BT_ASSERT=n
+CONFIG_ASSERT_VERBOSE=n

samples/bluetooth/peripheral_power_profiling/src/main.c

@@ -8,6 +8,7 @@
 
 #include <zephyr/kernel.h>
 #include <zephyr/sys/poweroff.h>
+#include <zephyr/pm/device.h>
 #include <zephyr/sys/atomic.h>
 #include <zephyr/settings/settings.h>
 
@@ -57,6 +58,8 @@
 
 #define NFC_BUFFER_SIZE 1024
 
+const struct device *const cons = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
+
 static struct bt_le_oob oob_local;
 static uint8_t tk_local[NFC_NDEF_LE_OOB_REC_TK_LEN];
 static uint8_t nfc_buffer[NFC_BUFFER_SIZE];
@@ -625,6 +628,12 @@ static void system_off(void)
 
 	dk_set_led_off(RUN_STATUS_LED);
 
+	int rc = pm_device_action_run(cons, PM_DEVICE_ACTION_SUSPEND);
+
+	if (rc < 0) {
+		printk("Could not suspend console (%d)\n", rc);
+	}
+
 	sys_poweroff();
 }
 
@@ -656,6 +665,11 @@ int main(void)
 
 	printk("Starting Bluetooth Power Profiling example\n");
 
+	if (!device_is_ready(cons)) {
+		printk("%s: device not ready.\n", cons->name);
+		return 0;
+	}
+
 	err = dk_buttons_init(button_handler);
 	if (err) {
 		printk("Failed to initialize buttons (err %d)\n", err);