usb: usb251xb: Add US port lanes inversion property
The driver bindings already declare the "swap-dx-lanes" property to
invert the downstream ports lanes polarity. The similar config
can be defined for a single upstream port - "swap-us-lanes". It's
going to be boolean since there is only one upstream port
on the hub.
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Acked-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 119aeb6..4d6ae37 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -574,6 +574,8 @@
hub->port_swap = USB251XB_DEF_PORT_SWAP;
usb251xb_get_ports_field(hub, "swap-dx-lanes", data->port_cnt,
&hub->port_swap);
+ if (of_get_property(np, "swap-us-lanes", NULL))
+ hub->port_swap |= BIT(0);
/* The following parameters are currently not exposed to devicetree, but
* may be as soon as needed.
