i2c_root_adapter
i2c_root_adapter(dev) != &priv->adapter)
EXPORT_SYMBOL_GPL(i2c_root_adapter);
root = i2c_root_adapter(&parent->dev);
muxc->mux_locked = i2c_root_adapter(dev) == root;
root = i2c_root_adapter(&muxc->parent->dev);
pin_root = i2c_root_adapter(setting->pctldev->dev);
return i2c_root_adapter(&adap->dev);
struct i2c_adapter *i2c_root_adapter(struct device *dev);