i2c: Export i2c_for_each_dev

Introduce i2c_for_each_dev(), an i2c device iterator with proper
locking for use by i2c-dev. This is needed so that we can get rid of
the attach_adapter and detach_adapter legacy callback functions.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 3963a5567472..4df12c7e69d7 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -395,6 +395,8 @@ i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter)
                 return NULL;
 }
 
+int i2c_for_each_dev(void *data, int (*fn)(struct device *, void *));
+
 /* Adapter locking functions, exported for shared pin cases */
 void i2c_lock_adapter(struct i2c_adapter *);
 void i2c_unlock_adapter(struct i2c_adapter *);