From f875a26ed2fb10b67965d076acb3c11d516f8cb1 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 5 Jun 2015 14:26:21 -0600
Subject: [PATCH] Add SPI GPIO pin initialization.  From  Pierre-noel
 Bouteville.

---
 arch/arm/src/efm32/efm32_spi.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm/src/efm32/efm32_spi.c b/arch/arm/src/efm32/efm32_spi.c
index 82c43ee58c5..865782ebd69 100644
--- a/arch/arm/src/efm32/efm32_spi.c
+++ b/arch/arm/src/efm32/efm32_spi.c
@@ -65,6 +65,7 @@
 #include "efm32_dma.h"
 #include "efm32_lowputc.h"
 #include "efm32_spi.h"
+#include "efm32_gpio.h"
 
 #ifdef HAVE_SPI_DEVICE
 
@@ -1687,6 +1688,12 @@ struct spi_dev_s *efm32_spi_initialize(int port)
     {
       priv   = &g_spi0dev;
       config = &g_spi0config;
+      if (!priv->initialized)
+        {
+          efm32_configgpio(BOARD_SPI0_CLK);
+          efm32_configgpio(BOARD_SPI0_MOSI);
+          efm32_configgpio(BOARD_SPI0_MISO);
+        }
     }
   else
 #endif
@@ -1695,6 +1702,12 @@ struct spi_dev_s *efm32_spi_initialize(int port)
     {
       priv   = &g_spi1dev;
       config = &g_spi1config;
+      if (!priv->initialized)
+        {
+          efm32_configgpio(BOARD_SPI1_CLK);
+          efm32_configgpio(BOARD_SPI1_MOSI);
+          efm32_configgpio(BOARD_SPI1_MISO);
+        }
     }
   else
 #endif
@@ -1703,6 +1716,12 @@ struct spi_dev_s *efm32_spi_initialize(int port)
     {
       priv   = &g_spi2dev;
       config = &g_spi2config;
+      if (!priv->initialized)
+        {
+          efm32_configgpio(BOARD_SPI2_CLK);
+          efm32_configgpio(BOARD_SPI2_MOSI);
+          efm32_configgpio(BOARD_SPI2_MISO);
+        }
     }
   else
 #endif