i2c: Mark i2c_adapter.id as deprecated

It's about time to make it clear that i2c_adapter.id is deprecated.
Hopefully this will remind the last user to move over to a different
strategy.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>

3 files changed, 11 insertions, 2 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index d8f36f984faa..6c2f55e05f13 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -554,3 +554,13 @@ Why:    This is a legacy interface which have been replaced by a more
 Who:    NeilBrown <neilb@suse.de>
 
 ----------------------------
+
+What:   i2c_adapter.id
+When:   June 2011
+Why:    This field is deprecated. I2C device drivers shouldn't change their
+        behavior based on the underlying I2C adapter. Instead, the I2C
+        adapter driver should instantiate the I2C devices and provide the
+        needed platform-specific information.
+Who:    Jean Delvare <khali@linux-fr.org>
+
+----------------------------
diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c
index d32a4843fc3a..d7a4833be416 100644
--- a/drivers/i2c/i2c-mux.c
+++ b/drivers/i2c/i2c-mux.c
@@ -120,7 +120,6 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
         snprintf(priv->adap.name, sizeof(priv->adap.name),
                  "i2c-%d-mux (chan_id %d)", i2c_adapter_id(parent), chan_id);
         priv->adap.owner = THIS_MODULE;
-        priv->adap.id = parent->id;
         priv->adap.algo = &priv->algo;
         priv->adap.algo_data = priv;
         priv->adap.dev.parent = &parent->dev;
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 889b35abaeda..56cfe23ffb39 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -353,7 +353,7 @@ struct i2c_algorithm {
  */
 struct i2c_adapter {
         struct module *owner;
-        unsigned int id;
+        unsigned int id __deprecated;
         unsigned int class;               /* classes to allow probing for */
         const struct i2c_algorithm *algo; /* the algorithm to access the bus */
         void *algo_data;