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device connection: Find connections also by checking the references 

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>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
alistair/sunxi64-5.4-dsi
Heikki Krogerus 2019-05-31 17:15:40 +03:00 committed by Rafael J. Wysocki
parent 83b34afb6b
commit fde777791e
2 changed files with 27 additions and 1 deletions
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26
drivers/base/devcon.c
View File

@ -38,6 +38,28 @@ 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 = { };
void *ret;
int i;
for (i = 0; ; i++) {
con.fwnode = fwnode_find_reference(fwnode, con_id, i);
if (IS_ERR(con.fwnode))
break;
ret = match(&con, -1, data);
fwnode_handle_put(con.fwnode);
if (ret)
return ret;
}
return NULL;
}
/**
* device_connection_find_match - Find physical connection to a device
* @dev: Device with the connection
@ -65,6 +87,10 @@ 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
drivers/usb/roles/class.c
View File

@ -101,7 +101,7 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
struct device *dev;
if (con->fwnode) {
if (!fwnode_property_present(con->fwnode, con->id))
if (con->id && !fwnode_property_present(con->fwnode, con->id))
return NULL;
dev = class_find_device(role_class, NULL, con->fwnode,