boards: nordic: nrf52840dongle: Replace SYS_INIT with board hooks

Updates to use board hooks since SYS_INIT should not be used
in boards

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

boards/nordic/nrf52840dongle/Kconfig

@@ -3,13 +3,12 @@
 # Copyright (c) 2018-2023 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0
 
-if BOARD_NRF52840DONGLE
+config BOARD_NRF52840DONGLE
+	select BOARD_EARLY_INIT_HOOK
 
 config BOARD_HAS_NRF5_BOOTLOADER
 	bool "Board has nRF5 bootloader"
 	default y
 	help
 	  If selected, applications are linked so that they can be loaded by Nordic
 	  nRF5 bootloader.
-
-endif # BOARD_NRF52840DONGLE

boards/nordic/nrf52840dongle/board.c

@@ -7,10 +7,9 @@
 #include <zephyr/init.h>
 #include <hal/nrf_power.h>
 
-static int board_nrf52840dongle_nrf52840_init(void)
+void board_early_init_hook(void)
 {
-
-	/* if the nrf52840dongle_nrf52840 board is powered from USB
+	/* If the nrf52840dongle/nrf52840 board target is powered from USB
 	 * (high voltage mode), GPIO output voltage is set to 1.8 volts by
 	 * default and that is not enough to turn the green and blue LEDs on.
 	 * Increase GPIO voltage to 3.0 volts.
@@ -37,9 +36,4 @@ static int board_nrf52840dongle_nrf52840_init(void)
 		/* a reset is required for changes to take effect */
 		NVIC_SystemReset();
 	}
-
-	return 0;
 }
-
-SYS_INIT(board_nrf52840dongle_nrf52840_init, PRE_KERNEL_1,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);