diff --git a/arch/arm/src/efm32/efm32_spi.c b/arch/arm/src/efm32/efm32_spi.c
index 9c88e320b1..9a5fc1f59e 100644
--- a/arch/arm/src/efm32/efm32_spi.c
+++ b/arch/arm/src/efm32/efm32_spi.c
@@ -1546,7 +1546,7 @@ static int spi_portinitialize(struct efm32_spidev_s *priv)
    * 1. USART GPIO pins were configured in efm32_lowsetup().  Chip select
    *    pins must be configured by board specific logic before
    *    efm32_spi_initialize() is called.
-   * 2. Clocking for the USART as also enabled in up_lowsetup();
+   * 2. Clocking for the USART as also enabled in efm32_lowsetup();
    */
 
   /* Set bits for synchronous mode */
diff --git a/arch/arm/src/efm32/efm32_start.c b/arch/arm/src/efm32/efm32_start.c
index dd5f7b5de0..655e4e10f2 100644
--- a/arch/arm/src/efm32/efm32_start.c
+++ b/arch/arm/src/efm32/efm32_start.c
@@ -81,7 +81,7 @@ static void go_os_start(void *pv, unsigned int nbytes)
 #  if defined(CONFIG_ARMV7M_ITMSYSLOG)
 #    define showprogress(c) (void)syslog_putc(c)
 #  elif defined(HAVE_UART_CONSOLE) || defined(HAVE_LEUART_CONSOLE)
-#    define showprogress(c) up_lowputc(c)
+#    define showprogress(c) efm32_lowputc(c)
 #  else
 #    define showprogress(c)
 #  endif
diff --git a/configs/efm32-g8xx-stk/nsh/defconfig b/configs/efm32-g8xx-stk/nsh/defconfig
index 2aded20415..753669d80f 100644
--- a/configs/efm32-g8xx-stk/nsh/defconfig
+++ b/configs/efm32-g8xx-stk/nsh/defconfig
@@ -139,9 +139,11 @@ CONFIG_EFM32_HAVE_USART2=y
 CONFIG_EFM32_HAVE_UART0=y
 # CONFIG_EFM32_HAVE_UART1 is not set
 CONFIG_EFM32_HAVE_LEUART1=y
-# CONFIG_EFM32_USART is not set
+# CONFIG_EFM32_USART_ISUART is not set
+# CONFIG_EFM32_USART_ISSPI is not set
 CONFIG_EFM32_UART=y
 # CONFIG_EFM32_LEUART is not set
+# CONFIG_EFM32_DMA is not set
 # CONFIG_EFM32_USART0 is not set
 # CONFIG_EFM32_USART1 is not set
 # CONFIG_EFM32_USART2 is not set
@@ -399,6 +401,7 @@ CONFIG_ARCH_HAVE_UART0=y
 #
 CONFIG_MCU_SERIAL=y
 CONFIG_STANDARD_SERIAL=y
+# CONFIG_ARCH_HAVE_SERIAL_TERMIOS is not set
 CONFIG_UART0_SERIAL_CONSOLE=y
 # CONFIG_OTHER_SERIAL_CONSOLE is not set
 # CONFIG_NO_SERIAL_CONSOLE is not set