diff --git a/include/nuttx/spi/spi_bitbang.h b/include/nuttx/spi/spi_bitbang.h
index 25392b01c39..af40db47ba0 100644
--- a/include/nuttx/spi/spi_bitbang.h
+++ b/include/nuttx/spi/spi_bitbang.h
@@ -48,7 +48,7 @@
 #ifdef CONFIG_SPI_BITBANG
 
 /****************************************************************************
- * Private Types
+ * Public Types
  ****************************************************************************/
 
 #ifndef __ASSEMBLY__
@@ -139,7 +139,8 @@ extern "C"
  *
  ****************************************************************************/
 
-FAR struct spi_dev_s *spi_create_bitbang(FAR const struct spi_bitbang_ops_s *low);
+FAR struct spi_dev_s *spi_create_bitbang(
+                         FAR const struct spi_bitbang_ops_s *low);
 
 #undef EXTERN
 #if defined(__cplusplus)
diff --git a/include/nuttx/spi/spi_transfer.h b/include/nuttx/spi/spi_transfer.h
index 071f5c11345..1dd27d76439 100644
--- a/include/nuttx/spi/spi_transfer.h
+++ b/include/nuttx/spi/spi_transfer.h
@@ -52,6 +52,7 @@
 #ifdef CONFIG_SPI_EXCHANGE
 
 /* SPI Character Driver IOCTL Commands **************************************/
+
 /* The SPI driver is intended to support application testing of the SPI bus.
  * The SPI driver simply provides a user-accessible wrapper around the
  * OS internal spi_transfer() function.  The following IOCTL commands to
@@ -126,7 +127,7 @@ struct spi_sequence_s
 };
 
 /****************************************************************************
- * Public Functions
+ * Public Functions Definitions
  ****************************************************************************/
 
 /****************************************************************************