i2c: Make clear what the class field of i2c_adapter is good for

Make clear what the class field of i2c_adapter is good for.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 06115128047f..4ac8ec3c7927 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -345,7 +345,7 @@ struct i2c_algorithm {
 struct i2c_adapter {
         struct module *owner;
         unsigned int id;
-        unsigned int class;
+        unsigned int class;               /* classes to allow probing for */
         const struct i2c_algorithm *algo; /* the algorithm to access the bus */
         void *algo_data;