diff --git a/hw/bsp/metro_m0_express/board_metro_m0_express.c b/hw/bsp/metro_m0_express/board_metro_m0_express.c
index 6599c134..3b0edb40 100644
--- a/hw/bsp/metro_m0_express/board_metro_m0_express.c
+++ b/hw/bsp/metro_m0_express/board_metro_m0_express.c
@@ -41,6 +41,9 @@
 #include "sam.h"
 #include "hal/include/hal_gpio.h"
 #include "hal/include/hal_init.h"
+#include <hpl_gclk_base.h>
+#include <hpl_pm_config.h>
+#include <hpl_pm_base.h>
 #include "peripheral_clk_config.h"
 
 
@@ -49,9 +52,25 @@
 //--------------------------------------------------------------------+
 #define LED_STATE_ON  1
 
+/* Referenced GCLKs, should be initialized firstly */
+#define _GCLK_INIT_1ST (1 << 0 | 1 << 1)
+
+/* Not referenced GCLKs, initialized last */
+#define _GCLK_INIT_LAST (~_GCLK_INIT_1ST)
+
 void board_init(void)
 {
-  //init_mcu();
+  // Clock init ( follow hpl_init.c )
+
+  // hri_nvmctrl_set_CTRLA_RWS_bf(NVMCTRL, CONF_NVM_WAIT_STATE);
+
+  _pm_init();
+  _sysctrl_init_sources();
+#if _GCLK_INIT_1ST
+  _gclk_init_generators_by_fref(_GCLK_INIT_1ST);
+#endif
+  _sysctrl_init_referenced_generators();
+  _gclk_init_generators_by_fref(_GCLK_INIT_LAST);
 
   gpio_set_pin_direction(BOARD_LED0, GPIO_DIRECTION_OUT);
   gpio_set_pin_level(BOARD_LED0, 1-LED_STATE_ON);
@@ -103,4 +122,4 @@ uint32_t tusb_hal_millis(void)
 {
   return board_tick2ms(system_ticks);
 }
-#endif
\ No newline at end of file
+#endif
diff --git a/hw/bsp/metro_m4_express/board_metro_m4_express.c b/hw/bsp/metro_m4_express/board_metro_m4_express.c
index 0c251e80..ef851674 100644
--- a/hw/bsp/metro_m4_express/board_metro_m4_express.c
+++ b/hw/bsp/metro_m4_express/board_metro_m4_express.c
@@ -60,7 +60,7 @@
 void board_init(void)
 {
   // Clock init ( follow hpl_init.c )
-  //hri_nvmctrl_set_CTRLA_RWS_bf(NVMCTRL, CONF_NVM_WAIT_STATE);
+  // hri_nvmctrl_set_CTRLA_RWS_bf(NVMCTRL, CONF_NVM_WAIT_STATE);
 
   _osc32kctrl_init_sources();
   _oscctrl_init_sources();