linux-kernel - [PATCH 1/2] dt-bindings: reset: document Broadcom's BCM4908 USB reset binding

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Date:   Fri,  4 Dec 2020 10:37:03 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH 1/2] dt-bindings: reset: document Broadcom's BCM4908 USB reset binding

From: Rafał Miłecki <rafal@...ecki.pl>

Document binding of block responsible for initializing USB controllers
(OHCI, EHCI, XHCI).

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 .../reset/brcm,bcm4908-usb-reset.yaml         | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/brcm,bcm4908-usb-reset.yaml

diff --git a/Documentation/devicetree/bindings/reset/brcm,bcm4908-usb-reset.yaml b/Documentation/devicetree/bindings/reset/brcm,bcm4908-usb-reset.yaml
new file mode 100644
index 000000000000..31beb1c8f3cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/brcm,bcm4908-usb-reset.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/brcm,bcm4908-usb-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM4908 USB host controller reset
+
+description: >
+  BCM4908 has a separated block controlling all USB controllers. It handles the
+  whole setup process and takes care of initializing PHYs at the right time
+  (state).
+
+maintainers:
+  - Rafał Miłecki <rafal@...ecki.pl>
+
+properties:
+  compatible:
+    enum:
+      - brcm,bcm4908-usb-reset
+
+  reg:
+    maxItems: 1
+
+  resets:
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  phys:
+    minItems: 2
+    maxItems: 2
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+
+  phy-names:
+    items:
+      - const: usb2
+      - const: usb3
+
+  "#reset-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - phys
+  - phy-names
+  - "#reset-cells"
+
+additionalProperties: true
+
+examples:
+  - |
+    reset-controller@...0c200 {
+        compatible = "brcm,bcm4908-usb-reset";
+        reg = <0x8000c200 0x100>;
+
+        phys = <&usb2_phy>, <&usb3_phy>;
+        phy-names = "usb2", "usb3";
+
+        #reset-cells = <0>;
+    };
-- 
2.26.2