soc: nrf53: Port SYS_INIT to soc_early_init_hook

Port the nordicsemi_nrf53_init to use soc_early_init_hook instead of
SYS_INIT as SYS_INIT is legacy.

Signed-off-by: Sebastian Bøe <[email protected]>

Author: SebastianBoe

soc/nordic/nrf53/Kconfig

@@ -7,6 +7,7 @@ config SOC_SERIES_NRF53X
 	bool
 	select ARM
 	select SOC_COMPATIBLE_NRF53X
+	select SOC_EARLY_INIT_HOOK
 	select CPU_CORTEX_M33
 	select CPU_CORTEX_M_HAS_DWT
 	select CPU_HAS_ARM_MPU

soc/nordic/nrf53/soc.c

@@ -478,8 +478,7 @@ static int rtc_pretick_init(void)
 }
 #endif /* CONFIG_SOC_NRF53_RTC_PRETICK */
 
-
-static int nordicsemi_nrf53_init(void)
+void soc_early_init_hook(void)
 {
 #if defined(CONFIG_SOC_NRF5340_CPUAPP) && defined(CONFIG_NRF_ENABLE_CACHE)
 #if !defined(CONFIG_BUILD_WITH_TFM)
@@ -553,15 +552,13 @@ static int nordicsemi_nrf53_init(void)
 	nrf_regulators_vreg_enable_set(NRF_REGULATORS, NRF_REGULATORS_VREG_HIGH, true);
 #endif
 
-	return 0;
 }
 
 void arch_busy_wait(uint32_t time_us)
 {
 	nrfx_coredep_delay_us(time_us);
 }
 
-SYS_INIT(nordicsemi_nrf53_init, PRE_KERNEL_1, 0);
 
 #ifdef CONFIG_SOC_NRF53_RTC_PRETICK
 SYS_INIT(rtc_pretick_init, POST_KERNEL, 0);