[PATCH v4 06/12] usb: devicetree: Include USB SSP Gen X x Y

[Thinh Nguyen <Thinh.Nguyen@synopsys.com>]

According to the USB 3.2 spec, a super-speed-plus device can operate at
gen2x2, gen2x1, or gen1x2. If the USB controller device supports
multiple lanes at different transfer rates, the user can specify the HW
capability via these new speed strings:

"super-speed-plus-gen2x2"
"super-speed-plus-gen2x1"
"super-speed-plus-gen1x2"

If the argument is simply "super-speed-plus", USB controllers should
default to their maximum transfer rate and number of lanes.

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
---
Changes in v4:
- None
Changes in v3:
- Use "maximum-speed" to include both the num-lane and transfer rate for SSP
- Remove "num-lanes" and "lane-speed-mantissa-gbps" properties
Changes in v2:
- Make "num-lanes" and "lane-speed-mantissa-gbps" common USB properties

 Documentation/devicetree/bindings/usb/generic.txt | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt
index ba472e7aefc9..8541b9571f2f 100644
--- a/Documentation/devicetree/bindings/usb/generic.txt
+++ b/Documentation/devicetree/bindings/usb/generic.txt
@@ -3,10 +3,13 @@ Generic USB Properties
 Optional properties:
  - maximum-speed: tells USB controllers we want to work up to a certain
 			speed. Valid arguments are "super-speed-plus",
-			"super-speed", "high-speed", "full-speed" and
-			"low-speed". In case this isn't passed via DT, USB
-			controllers should default to their maximum HW
-			capability.
+			"super-speed-plus-gen2x2", "super-speed-plus-gen2x1",
+			"super-speed-plus-gen1x2", "super-speed", "high-speed",
+			"full-speed" and "low-speed". In case this isn't passed
+			via DT, USB controllers should default to their maximum
+			HW capability. Similarly, if the argument is
+			"super-speed-plus", USB controllers should default to
+			their maximum transfer rate and number of lanes.
  - dr_mode: tells Dual-Role USB controllers that we want to work on a
 			particular mode. Valid arguments are "host",
 			"peripheral" and "otg". In case this attribute isn't
-- 
2.11.0