linux-kernel - [PATCH v1 1/3] dt-bindings: usb: Add HPE GXP UDCG Controller

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Message-Id: <20230706215910.78772-2-richard.yu@hpe.com>
Date:   Thu,  6 Jul 2023 16:59:08 -0500
From:   richard.yu@....com
To:     verdun@....com, nick.hawkins@....com, gregkh@...uxfoundation.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, richard.yu@....com, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/3] dt-bindings: usb: Add HPE GXP UDCG Controller

From: Richard Yu <richard.yu@....com>

Provide access to the two register regions for GXP Virtual EHCI
controller through the hpe,gxp-udcg binding.

Signed-off-by: Richard Yu <richard.yu@....com>
---
 .../devicetree/bindings/usb/hpe,gxp-udcg.yaml | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/hpe,gxp-udcg.yaml

diff --git a/Documentation/devicetree/bindings/usb/hpe,gxp-udcg.yaml b/Documentation/devicetree/bindings/usb/hpe,gxp-udcg.yaml
new file mode 100644
index 000000000000..e6746374f97d
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/hpe,gxp-udcg.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/hpe,gxp-udcg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HPE GXP USB Virtual EHCI controller
+
+maintainers:
+  - Nick Hawkins <nick.hawkins@....com>
+  - Richard Yu <richard.yu@....com>
+
+description: |+
+  The HPE GXP USB Virtual EHCI Controller implements 1 set of USB EHCI
+  register and several sets of device and endpoint registers to support
+  the virtual EHCI's downstream USB devices.
+
+properties:
+  compatible:
+    enum:
+      - hpe,gxp-udcg
+
+  reg:
+    items:
+      - description: UDC Global (UDCG) config controller
+      - description: UDC Invidual config/interrupt controllers
+
+  reg-names:
+    items:
+      - const: udcg
+      - const: udc
+
+  interrupts:
+    maxItems: 1
+
+  hpe,vehci-downstream-ports:
+    description: Number of downstream ports supported by the GXP
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 4
+    minimum: 1
+    maximum: 8
+
+  hpe,vehci-generic-endpoints:
+    description: Number of generic endpoints supported by the GXP
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 16
+    minimum: 1
+    maximum: 16
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - hpe,vehci-downstream-ports
+  - hpe,vehci-generic-endpoints
+
+additionalProperties: false
+
+examples:
+  - |
+    udcg@...00800 {
+        compatible = "hpe,gxp-udcg";
+        reg = <0x80400800 0x0200>, <0x80401000 0x8000>;
+        reg-names = "udcg", "udc";
+        interrupts = <13>;
+        interrupt-parent = <&vic1>;
+        hpe,vehci-downstream-ports = <4>;
+        hpe,vehci-generic-endpoints = <16>;
+    };
-- 
2.17.1