linux-kernel - [RFC v2 1/2] dt-bindings: usb: dwc3: Add support for multiport related properties

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Date:   Thu, 26 May 2022 15:43:48 +0530
From:   Harsh Agarwal <quic_harshq@...cinc.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Felipe Balbi <balbi@...nel.org>
CC:     <devicetree@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <quic_pkondeti@...cinc.com>,
        <quic_ppratap@...cinc.com>, Harsh Agarwal <quic_harshq@...cinc.com>
Subject: [RFC v2 1/2] dt-bindings: usb: dwc3: Add support for multiport related properties

Added support for multiport, mport, num-ssphy and num-hsphy
properties. These properties are used to support devices having
a multiport controller.

Signed-off-by: Harsh Agarwal <quic_harshq@...cinc.com>
---
 .../devicetree/bindings/usb/snps,dwc3.yaml         | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index f4471f8..3a506aa 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -341,6 +341,34 @@ properties:
       This port is used with the 'usb-role-switch' property  to connect the
       dwc3 to type C connector.
 
+  multiport:
+    description:
+      If a single USB controller supports multiple ports, then it's referred to as
+      a multiport controller. Each port of the multiport controller can support
+      either High Speed or Super Speed or both and have their own PHY phandles. Each
+      port is represented by "mport" node and all the "mport" nodes are grouped
+      together inside the "multiport" node where individual "mport" node defines the
+      PHYs supported by that port.
+    required:
+      - mport
+
+  num-hsphy:
+    description: Total number of HS-PHYs defined by the multiport controller.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  num-ssphy:
+    description: Total number of SS-PHYs defined by the multiport controller.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  mport:
+    description: Each mport node represents one port of the multiport controller.
+    oneOf:
+       - required:
+         - usb-phy
+       - required:
+          - phys
+          - phy-names
+
 unevaluatedProperties: false
 
 required:
@@ -369,4 +397,31 @@ examples:
       snps,dis_u2_susphy_quirk;
       snps,dis_enblslpm_quirk;
     };
+  - |
+    usb@...00000 {
+      compatible = "snps,dwc3";
+      reg = <0x4a000000 0xcfff>;
+      interrupts = <0 92 4>;
+
+      multiport {
+
+        MP_1: mport@1 {
+          usb-phy = <&usb2_phy0>, <&usb3_phy0>;
+          /* Can define Generic PHYs also */
+        };
+
+        MP_2: mport@2 {
+          usb-phy = <&usb2_phy1>, <&usb3_phy1>;
+        };
+
+        MP_3: mport@3 {
+          usb-phy = <&usb2_phy2>;
+        };
+
+        MP_4: mport@4 {
+          usb-phy = <&usb2_phy3>;
+        };
+
+      };
+    };
 ...
-- 
2.7.4