[bootlin/training-materials updates] master: Improve details about i2c basic functions (bbc1484e)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/bbc1484ea128a4942886d673bbc789bb0a86e77d

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

commit bbc1484ea128a4942886d673bbc789bb0a86e77d
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Fri Mar 15 15:38:16 2019 +0100

    Improve details about i2c basic functions
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


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

bbc1484ea128a4942886d673bbc789bb0a86e77d
 slides/kernel-i2c/kernel-i2c.tex | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/slides/kernel-i2c/kernel-i2c.tex b/slides/kernel-i2c/kernel-i2c.tex
index 2573c52c..9f17c9dc 100644
--- a/slides/kernel-i2c/kernel-i2c.tex
+++ b/slides/kernel-i2c/kernel-i2c.tex
@@ -261,13 +261,15 @@ static int <driver>_remove(struct i2c_client *client)
   functions to either send or receive data:
   \begin{itemize}
   \item
-    \code{int i2c_master_send(struct i2c_client *client, const char *buf, int count);}\\Sends
-    the contents of \code{buf} to the client.
+    \code{int i2c_master_send(const struct i2c_client *client, const char *buf, int count);}
+    \\Sends the contents of \code{buf} to the client.
   \item
-    \code{int i2c_master_recv(struct i2c_client *client, char *buf, int count);}\\Receives
-    \code{count} bytes from the client, and store them into
+    \code{int i2c_master_recv(const struct i2c_client *client, char *buf, int count);}
+    \\Receives \code{count} bytes from the client, and store them into
     \code{buf}.
   \end{itemize}
+  Both functions a negative error number in case of failure, otherwise the
+  number of transmitted bytes.
 \end{frame}
 
 \begin{frame}{Communicating with the I2C device: message transfer}
@@ -276,7 +278,7 @@ static int <driver>_remove(struct i2c_client *client)
   transaction in one direction:
   \begin{itemize}
   \item
-    \code{int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num);}
+    \code{int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);}
   \item The \kstruct{i2c_adapter} pointer can be found by using
     \code{client->adapter}
   \item The \kstruct{i2c_msg} structure defines the length, location, and