ENGR00114663-2 Add function comments for mmap function of MXS VIIM driver

Add function comments for memory map function of MXS VIIM driver.

Signed-off-by: Liu Ying <b17645@freescale.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/char/mxs_viim.c b/drivers/char/mxs_viim.c
index 09d3e80540bf..2510afa6c13e 100755
--- a/drivers/char/mxs_viim.c
+++ b/drivers/char/mxs_viim.c
@@ -24,6 +24,10 @@ static struct device *iim_dev;
 
 /*!
  * MXS Virtual IIM interface - memory map function
+ * This function maps one page size VIIM registers from VIIM base address0
+ * if the size of the required virtual memory space is less than or equal to
+ * one page size, otherwise this function will also map one page size VIIM
+ * registers from VIIM base address1.
  *
  * @param file	     struct file *
  * @param vma	     structure vm_area_struct *