soc: silabs: move init code from SYS_INIT to hooks

Replace SYS_INIT with SoC hooks and adapt SoC init code

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

soc/silabs/common/soc.c

@@ -206,7 +206,7 @@ static void swo_init(void)
  *
  * @return 0
  */
-static int silabs_init(void)
+void soc_early_init_hook(void)
 {
 	/* handle chip errata */
 	CHIP_Init();
@@ -240,8 +240,4 @@ static int silabs_init(void)
 	swo_init();
 #endif
 #endif /* !CONFIG_SOC_GECKO_DEV_INIT */
-
-	return 0;
 }
-
-SYS_INIT(silabs_init, PRE_KERNEL_1, 0);

soc/silabs/silabs_s0/Kconfig

@@ -7,6 +7,7 @@ if SOC_FAMILY_SILABS_S0
 config SOC_FAMILY_SILABS_S0
 	select HAS_SEGGER_RTT if ZEPHYR_SEGGER_MODULE
 	select BUILD_OUTPUT_HEX
+	select SOC_EARLY_INIT_HOOK
 
 rsource "*/Kconfig"
 

soc/silabs/silabs_s1/Kconfig

@@ -7,6 +7,7 @@ if SOC_FAMILY_SILABS_S1
 config SOC_FAMILY_SILABS_S1
 	select HAS_SEGGER_RTT if ZEPHYR_SEGGER_MODULE
 	select BUILD_OUTPUT_HEX
+	select SOC_EARLY_INIT_HOOK
 
 rsource "*/Kconfig"
 

soc/silabs/silabs_s2/Kconfig

@@ -7,6 +7,7 @@ if SOC_FAMILY_SILABS_S2
 config SOC_FAMILY_SILABS_S2
 	select HAS_SEGGER_RTT if ZEPHYR_SEGGER_MODULE
 	select BUILD_OUTPUT_HEX
+	select SOC_EARLY_INIT_HOOK
 
 rsource "*/Kconfig"
 

soc/silabs/silabs_sim3/sim3u/Kconfig

@@ -8,3 +8,4 @@ config SOC_SERIES_SIM3U
 	select CPU_CORTEX_M3
 	select CPU_CORTEX_M_HAS_SYSTICK
 	select HAS_SILABS_SI32
+	select SOC_EARLY_INIT_HOOK

soc/silabs/silabs_sim3/sim3u/soc.c

@@ -108,7 +108,7 @@ __no_optimization static void busy_delay(uint32_t cycles)
 	}
 }
 
-static int silabs_sim3u_init(void)
+void soc_early_init_hook(void)
 {
 	uint32_t key;
 
@@ -130,8 +130,4 @@ static int silabs_sim3u_init(void)
 	vmon_init();
 
 	irq_unlock(key);
-
-	return 0;
 }
-
-SYS_INIT(silabs_sim3u_init, PRE_KERNEL_1, 0);