usb: typec: stusb160x: Don't block probing of consumer of "connector" nodes

Similar as with tcpm this patch lets fw_devlink know not to wait on the
fwnode to be populated as a struct device.

Without this patch, USB functionality can be broken on some previously
supported boards.

Fixes: 28ec344bb891 ("usb: typec: tcpm: Don't block probing of consumers of "connector" nodes")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20210716120718.20398-3-amelie.delaunay@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/stusb160x.c b/drivers/usb/typec/stusb160x.c
index 3d3848e..e7745d1 100644 (file)
--- a/drivers/usb/typec/stusb160x.c
+++ b/drivers/usb/typec/stusb160x.c
@@ -686,6 +686,15 @@ static int stusb160x_probe(struct i2c_client *client)
                return -ENODEV;
 
        /*
+        * This fwnode has a "compatible" property, but is never populated as a
+        * struct device. Instead we simply parse it to read the properties.
+        * This it breaks fw_devlink=on. To maintain backward compatibility
+        * with existing DT files, we work around this by deleting any
+        * fwnode_links to/from this fwnode.
+        */
+       fw_devlink_purge_absent_suppliers(fwnode);
+
+       /*
         * When both VDD and VSYS power supplies are present, the low power
         * supply VSYS is selected when VSYS voltage is above 3.1 V.
         * Otherwise VDD is selected.