From d088cbec5bab6c6fd660c1acd33c02882aaa936c Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 20 Jun 2013 17:39:42 -0600
Subject: [PATCH] Fix backward wait condition in KL24Z SPI driver

---
 arch/arm/src/kl/kl_spi.c | 8 ++++----
 arch/arm/src/kl/kl_spi.h | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/src/kl/kl_spi.c b/arch/arm/src/kl/kl_spi.c
index 4573e4a079..b48fcc4789 100755
--- a/arch/arm/src/kl/kl_spi.c
+++ b/arch/arm/src/kl/kl_spi.c
@@ -488,7 +488,7 @@ static uint16_t spi_send(FAR struct spi_dev_s *dev, uint16_t wd)
 
   /* Make sure that the transmit buffer is empty */
 
-  while ((spi_getreg(priv, KL_SPI_S_OFFSET) & SPI_S_SPTEF) != 0);
+  while ((spi_getreg(priv, KL_SPI_S_OFFSET) & SPI_S_SPTEF) == 0);
 
   /* Write the data to transmitted to the SPI Data Register */
 
@@ -555,7 +555,7 @@ static void spi_exchange(FAR struct spi_dev_s *dev, FAR const void *txbuffer,
        * to the serializer.
        */
 
-      while ((spi_getreg(priv, KL_SPI_S_OFFSET) & SPI_S_SPTEF) != 0);
+      while ((spi_getreg(priv, KL_SPI_S_OFFSET) & SPI_S_SPTEF) == 0);
 
       /* Write the data to transmitted to the Transmit Data Register (TDR) */
 
@@ -675,7 +675,7 @@ FAR struct spi_dev_s *up_spiinitialize(int port)
 
       /* Enable clocking */
 
-      regval = getreg32(KL_SIM_SCGC4);
+      regval  = getreg32(KL_SIM_SCGC4);
       regval |= SIM_SCGC4_SPI0;
       putreg32(regval, KL_SIM_SCGC4);
     }
@@ -694,7 +694,7 @@ FAR struct spi_dev_s *up_spiinitialize(int port)
 
       /* Enable clocking */
 
-      regval = getreg32(KL_SIM_SCGC4);
+      regval  = getreg32(KL_SIM_SCGC4);
       regval |= SIM_SCGC4_SPI1;
       putreg32(regval, KL_SIM_SCGC4);
     }
diff --git a/arch/arm/src/kl/kl_spi.h b/arch/arm/src/kl/kl_spi.h
index 659ee8f5f3..7b5e56d4be 100644
--- a/arch/arm/src/kl/kl_spi.h
+++ b/arch/arm/src/kl/kl_spi.h
@@ -66,7 +66,7 @@ extern "C" {
  * Public Function Prototypes
  ************************************************************************************/
 
-/****************************************************************************
+/************************************************************************************
  * Name: up_spiinitialize
  *
  * Description:
@@ -78,7 +78,7 @@ extern "C" {
  * Returned Value:
  *   Valid SPI device structure reference on succcess; a NULL on failure
  *
- ****************************************************************************/
+ ************************************************************************************/
 
 struct spi_dev_s;
 FAR struct spi_dev_s *up_spiinitialize(int port);