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authorHeikki Krogerus <heikki.krogerus@linux.intel.com>2019-08-29 17:22:33 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-09-03 16:04:52 +0200
commit44493062abc38e5895e0cf8d22698f2ca39a1e4d (patch)
tree43300e21c254fceea83b77dab52b56c8f9cc7d21 /drivers/base
parent977607653cdd06a2c4d1d0f179ff46cc0cbe83a5 (diff)
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>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/devcon.c43
1 files changed, 31 insertions, 12 deletions
diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c
index 09f28479b243..986ad89de2f9 100644
--- a/drivers/base/devcon.c
+++ b/drivers/base/devcon.c
@@ -12,9 +12,6 @@
static DEFINE_MUTEX(devcon_lock);
static LIST_HEAD(devcon_list);
-typedef void *(*devcon_match_fn_t)(struct device_connection *con, int ep,
- void *data);
-
static void *
fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
void *data, devcon_match_fn_t match)
@@ -61,6 +58,34 @@ fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
}
/**
+ * fwnode_connection_find_match - Find connection from a device node
+ * @fwnode: Device node with the connection
+ * @con_id: Identifier for the connection
+ * @data: Data for the match function
+ * @match: Function to check and convert the connection description
+ *
+ * Find a connection with unique identifier @con_id between @fwnode and another
+ * device node. @match will be used to convert the connection description to
+ * data the caller is expecting to be returned.
+ */
+void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
+ const char *con_id, void *data,
+ devcon_match_fn_t match)
+{
+ void *ret;
+
+ if (!fwnode || !match)
+ return NULL;
+
+ ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
+ if (ret)
+ return ret;
+
+ return fwnode_devcon_match(fwnode, con_id, data, match);
+}
+EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
+
+/**
* device_connection_find_match - Find physical connection to a device
* @dev: Device with the connection
* @con_id: Identifier for the connection
@@ -83,15 +108,9 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
if (!match)
return NULL;
- if (fwnode) {
- ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
- if (ret)
- return ret;
-
- ret = fwnode_devcon_match(fwnode, con_id, data, match);
- if (ret)
- return ret;
- }
+ ret = fwnode_connection_find_match(fwnode, con_id, data, match);
+ if (ret)
+ return ret;
mutex_lock(&devcon_lock);