[lm-sensors] patch i2c-dev-doc-update.patch added to gregkh-2.6 tree

gregkh at suse.de gregkh at suse.de
Fri Jul 1 23:46:54 CEST 2005

This is a note to let you know that I've just added the patch titled

     Subject: I2C: Clarify the usage of i2c-dev.h

to my gregkh-2.6 tree.  Its filename is


This tree can be found at 

Patches currently in gregkh-2.6 which might be from khali at linux-fr.org are


>From khali at linux-fr.org Sat Jun 25 02:39:22 2005
Date: Sat, 25 Jun 2005 11:37:40 +0200
From: Jean Delvare <khali at linux-fr.org>
To: Greg KH <greg at kroah.com>
Cc: LM Sensors <lm-sensors at lm-sensors.org>, Nils Roeder <nroeder at inf.ed.ac.uk>
Subject: I2C: Clarify the usage of i2c-dev.h
Message-Id: <20050625113740.29b08918.khali at linux-fr.org>

Upon suggestion by Nils Roeder, here is an update to the i2c
documentation to clarify which header files user-space applications
relying on the i2c-dev interface should include.

Signed-off-by: Jean Delvare <khali at linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>

 Documentation/i2c/dev-interface |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

--- gregkh-2.6.orig/Documentation/i2c/dev-interface	2005-07-01 14:44:13.000000000 -0700
+++ gregkh-2.6/Documentation/i2c/dev-interface	2005-07-01 14:44:14.000000000 -0700
@@ -14,9 +14,12 @@
 So let's say you want to access an i2c adapter from a C program. The
-first thing to do is `#include <linux/i2c.h>" and "#include <linux/i2c-dev.h>. 
-Yes, I know, you should never include kernel header files, but until glibc 
-knows about i2c, there is not much choice.
+first thing to do is "#include <linux/i2c-dev.h>". Please note that
+there are two files named "i2c-dev.h" out there, one is distributed
+with the Linux kernel and is meant to be included from kernel
+driver code, the other one is distributed with lm_sensors and is
+meant to be included from user-space programs. You obviously want
+the second one here.
 Now, you have to decide which adapter you want to access. You should
 inspect /sys/class/i2c-dev/ to decide this. Adapter numbers are assigned
@@ -78,7 +81,7 @@
 The following IOCTLs are defined and fully supported 
-(see also i2c-dev.h and i2c.h):
+(see also i2c-dev.h):
 ioctl(file,I2C_SLAVE,long addr)
   Change slave address. The address is passed in the 7 lower bits of the

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