CONFIG_ARM=y CONFIG_SOC_MKL25Z=y CONFIG_SOC_SERIES_KINETIS_KL2X=y CONFIG_BOARD_FRDM_KL25Z=y CONFIG_CONSOLE=y CONFIG_UART_CONSOLE=y CONFIG_SERIAL=y CONFIG_CORTEX_M_SYSTICK=y CONFIG_GPIO=y CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000 CONFIG_OSC_LOW_POWER=y