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

[Heikki Krogerus]

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.kroge...@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