[FE training-materials-updates] Some details about the userspace API of misc devices

[Thomas Petazzoni]

Repository : git://git.free-electrons.com/training-materials.git

On branch  : kernel-ng
Link       : http://git.free-electrons.com/training-materials/commit/?id=9850bb451b8c2f7b2a1451c6d8e0bfdfd243bb2f

>---------------------------------------------------------------

commit 9850bb451b8c2f7b2a1451c6d8e0bfdfd243bb2f
Author: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date:   Fri Sep 27 13:12:57 2013 +0200

    Some details about the userspace API of misc devices
    
    Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>


>---------------------------------------------------------------

9850bb451b8c2f7b2a1451c6d8e0bfdfd243bb2f
 .../kernel-misc-subsystem.tex                      |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/slides/kernel-misc-subsystem/kernel-misc-subsystem.tex b/slides/kernel-misc-subsystem/kernel-misc-subsystem.tex
index 7f84221..c2c05a3 100644
--- a/slides/kernel-misc-subsystem/kernel-misc-subsystem.tex
+++ b/slides/kernel-misc-subsystem/kernel-misc-subsystem.tex
@@ -75,6 +75,22 @@ struct miscdevice  {
   \end{itemize}
 \end{frame}
 
+\begin{frame}{User-space API for misc devices}
+  \begin{itemize}
+  \item {\em misc devices} are regular character devices
+  \item The operations they support in user-space depends on the
+    operations the kernel driver implements:
+    \begin{itemize}
+    \item The \code{open()} and \code{close()} system calls to
+      open/close the device.
+    \item The \code{read()} and \code{write()} system calls to
+      read/write to/from the device.
+    \item The \code{ioctl()} system call to call some driver-specific
+      operations.
+    \end{itemize}
+  \end{itemize}
+\end{frame}
+
 \setuplabframe
 {Output-only serial port driver}
 {