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authorJean Delvare <khali@linux-fr.org>2010-10-24 18:16:57 +0200
committerJean Delvare <khali@endymion.delvare>2010-10-24 18:16:57 +0200
commit97cc4d49cfcda1c2dad89c00b62a25b628ce2115 (patch)
tree1c9120a9e5db76df3f82338c64a2a19d88aedcbc /include/linux/i2c.h
parentd582963a027fd63f8dfc97a0bf3654d4380e34ce (diff)
downloadlwn-97cc4d49cfcda1c2dad89c00b62a25b628ce2115.tar.gz
lwn-97cc4d49cfcda1c2dad89c00b62a25b628ce2115.zip
i2c: Let i2c_parent_is_i2c_adapter return the parent adapter
This makes the calling site's code clearer IMHO. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
Diffstat (limited to 'include/linux/i2c.h')
-rw-r--r--include/linux/i2c.h11
1 files changed, 8 insertions, 3 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 9391a491501a..1f66fa06a97c 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -384,10 +384,15 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
dev_set_drvdata(&dev->dev, data);
}
-static inline int i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter)
+static inline struct i2c_adapter *
+i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter)
{
- return adapter->dev.parent != NULL
- && adapter->dev.parent->type == &i2c_adapter_type;
+ struct device *parent = adapter->dev.parent;
+
+ if (parent != NULL && parent->type == &i2c_adapter_type)
+ return to_i2c_adapter(parent);
+ else
+ return NULL;
}
/* Adapter locking functions, exported for shared pin cases */