diff options
| author |   Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2019-08-29 17:22:33 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-03 16:04:52 +0200 |
| commit | 44493062abc38e5895e0cf8d22698f2ca39a1e4d (patch) | |
| tree | 43300e21c254fceea83b77dab52b56c8f9cc7d21 /drivers/base | |
| parent | usb: roles: Introduce stubs for the exiting functions in role.h (diff) | |
| download | linux-dev-44493062abc38e5895e0cf8d22698f2ca39a1e4d.tar.xz linux-dev-44493062abc38e5895e0cf8d22698f2ca39a1e4d.zip | |
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.c | 43 |
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); |