usb: typec: mux: Allow muxes to specify mode-switch

Loosen the typec_mux_match() requirements so that searches where an
alt mode is not specified, but the target mux device lists the
"mode-switch" property, return a success.

This is helpful in Type C port drivers which would like to get a pointer
to the mux switch associated with a Type C port, but don't want to
specify a particular alt mode.

Signed-off-by: Prashant Malani <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Reviewed-by: Nícolas F. R. A. Prado <[email protected]>
Tested-by: Nícolas F. R. A. Prado <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Prashant Malani

drivers/usb/typec/mux.c

@@ -281,9 +281,13 @@ static void *typec_mux_match(struct fwnode_handle *fwnode, const char *id,
 	if (match)
 		goto find_mux;
 
-	/* Accessory Mode muxes */
 	if (!desc) {
-		match = fwnode_property_present(fwnode, "accessory");
+		/*
+		 * Accessory Mode muxes & muxes which explicitly specify
+		 * the required identifier can avoid SVID matching.
+		 */
+		match = fwnode_property_present(fwnode, "accessory") ||
+			fwnode_property_present(fwnode, id);
 		if (match)
 			goto find_mux;
 		return NULL;