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device connection: Add fwnode_connection_find_match()
The fwnode_connection_find_match() function is exactly the same as device_connection_find_match(), except it takes struct fwnode_handle as parameter instead of struct device. That allows locating device connections before the device entries have been created. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Link: https://lore.kernel.org/r/1567070558-29417-7-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -12,9 +12,6 @@
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static DEFINE_MUTEX(devcon_lock);
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static DEFINE_MUTEX(devcon_lock);
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static LIST_HEAD(devcon_list);
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static LIST_HEAD(devcon_list);
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typedef void *(*devcon_match_fn_t)(struct device_connection *con, int ep,
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void *data);
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static void *
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static void *
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fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
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fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
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void *data, devcon_match_fn_t match)
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void *data, devcon_match_fn_t match)
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@ -60,6 +57,34 @@ fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
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return NULL;
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return NULL;
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}
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}
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/**
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* fwnode_connection_find_match - Find connection from a device node
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* @fwnode: Device node with the connection
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* @con_id: Identifier for the connection
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* @data: Data for the match function
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* @match: Function to check and convert the connection description
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*
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* Find a connection with unique identifier @con_id between @fwnode and another
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* device node. @match will be used to convert the connection description to
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* data the caller is expecting to be returned.
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*/
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void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
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const char *con_id, void *data,
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devcon_match_fn_t match)
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{
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void *ret;
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if (!fwnode || !match)
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return NULL;
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ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
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if (ret)
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return ret;
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return fwnode_devcon_match(fwnode, con_id, data, match);
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}
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EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
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/**
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/**
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* device_connection_find_match - Find physical connection to a device
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* device_connection_find_match - Find physical connection to a device
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* @dev: Device with the connection
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* @dev: Device with the connection
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@ -83,15 +108,9 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
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if (!match)
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if (!match)
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return NULL;
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return NULL;
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if (fwnode) {
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ret = fwnode_connection_find_match(fwnode, con_id, data, match);
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ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
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if (ret)
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if (ret)
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return ret;
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return ret;
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ret = fwnode_devcon_match(fwnode, con_id, data, match);
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if (ret)
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return ret;
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}
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mutex_lock(&devcon_lock);
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mutex_lock(&devcon_lock);
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@ -781,10 +781,14 @@ struct device_connection {
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struct list_head list;
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struct list_head list;
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};
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};
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typedef void *(*devcon_match_fn_t)(struct device_connection *con, int ep,
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void *data);
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void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
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const char *con_id, void *data,
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devcon_match_fn_t match);
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void *device_connection_find_match(struct device *dev, const char *con_id,
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void *device_connection_find_match(struct device *dev, const char *con_id,
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void *data,
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void *data, devcon_match_fn_t match);
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void *(*match)(struct device_connection *con,
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int ep, void *data));
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struct device *device_connection_find(struct device *dev, const char *con_id);
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struct device *device_connection_find(struct device *dev, const char *con_id);
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