[PATCH v3 02/13] dt-bindings: usb: mtu3: add optional property to disable usb2 ports

[Chunfeng Yun <chunfeng.yun@mediatek.com>]

Add support to disable specific usb2 host ports, it's useful when
a usb2 port is disabled on some platforms, but enabled on others for
the same SoC, another case is that the different package may support
different number of ports.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
Due to there is property 'mediatek,u3p-dis-msk', prefer to use
a similar name for the similar opertions, not spell out 'mask'
as suggested by Rob.

v2~3: no changes
---
 Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml b/Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml
index 2cac7a87ce36..3e6f2750f48d 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml
@@ -166,6 +166,12 @@ properties:
     description: The mask to disable u3ports, bit0 for u3port0,
       bit1 for u3port1, ... etc
 
+  mediatek,u2p-dis-msk:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: The mask to disable u2ports, bit0 for u2port0,
+      bit1 for u2port1, ... etc; but can't disable u2port0 if dual role mode
+      is enabled, so will be skipped in this case.
+
 # Required child node when support dual-role
 patternProperties:
   "^usb@[0-9a-f]+$":
-- 
2.18.0