From 692f63e3ee9c9cdde5aca0e3b4a960aadfe193b6 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 29 Oct 2014 11:20:54 -0600
Subject: [PATCH] EFM32: In order to use LEUART, LE clocking must be enabled

---
 arch/arm/src/efm32/efm32_lowputc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/src/efm32/efm32_lowputc.c b/arch/arm/src/efm32/efm32_lowputc.c
index 4198288f5d..f343d341a4 100644
--- a/arch/arm/src/efm32/efm32_lowputc.c
+++ b/arch/arm/src/efm32/efm32_lowputc.c
@@ -323,6 +323,12 @@ void efm32_lowsetup(void)
 #endif /* HAVE_UART_DEVICE */
 
 #ifdef HAVE_LEUART_DEVICE
+  /* Enable the LE interface clock must be enabled in CMU_HFCORECLKEN0 */
+
+  regval  = getreg32(EFM32_CMU_HFCORECLKEN0);
+  regval |= CMU_HFCORECLKEN0_LE;
+  putreg32(regval, EFM32_CMU_HFCORECLKEN0);
+
   /* Enable clocking to configured LEUART interfaces */
 
   regval  = getreg32(EFM32_CMU_LFBCLKEN0);