[PATCH v3 07/13] device connection: Find connections also by checking the references

Heikki Krogerus
2019-04-12T13:41:52Z

We can also use this API to find named references that the
device nodes have by using fwnode_property_get_reference_args()
function.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
drivers/base/devcon.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)

diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c
index 04db9ae235e4..4cdf95532b63 100644
--- a/drivers/base/devcon.c
+++ b/drivers/base/devcon.c
@@ -38,6 +38,30 @@ fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
return NULL;
}

+static void *
+fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
+ void *data, devcon_match_fn_t match)
+{
+ struct device_connection con = { };
+ struct fwnode_reference_args args;
+ void *ret;
+ int i;
+
+ for (i = 0; ; i++) {
+ if (fwnode_property_get_reference_args(fwnode, con_id, NULL, 0,
+ i, &args))
+ break;
+
+ con.fwnode = args.fwnode;
+ ret = match(&con, -1, data);
+ fwnode_handle_put(args.fwnode);
+ if (ret)
+ return ret;
+ }
+
+ return NULL;
+}
+
/**
* device_connection_find_match - Find physical connection to a device
* @dev: Device with the connection
@@ -65,6 +89,10 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
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;
}

mutex_lock(&devcon_lock);
--
2.20.1