linux-kernel - [PATCH 1/2] dt-bindings: usb: Add documentation for AM62 USB Wrapper module

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Date:   Wed, 23 Mar 2022 11:05:23 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, Felipe Balbi <balbi@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Roger Quadros <rogerq@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Aswath Govindraju <a-govindraju@...com>
Subject: [PATCH 1/2] dt-bindings: usb: Add documentation for AM62 USB Wrapper module

Add bindings for the TI's AM62 wrapper module for the Synopsys USBSS-DRD
controller.

Signed-off-by: Aswath Govindraju <a-govindraju@...com>
---
 .../devicetree/bindings/usb/ti,am62-usb.yaml  | 98 +++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/ti,am62-usb.yaml

diff --git a/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml b/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml
new file mode 100644
index 000000000000..4bb139d1926d
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/ti,am62-usb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for the TI's AM62 wrapper module for the Synopsys USBSS-DRD controller
+
+maintainers:
+  - Aswath Govindraju <a-govindraju@...com>
+
+properties:
+  compatible:
+    const: ti,am62-usb
+
+  reg:
+    maxItems: 1
+
+  ranges: true
+
+  power-domains:
+    description:
+      PM domain provider node and an args specifier containing
+      the USB ISO device id value. See,
+      Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
+    maxItems: 1
+
+  clocks:
+    description: Clock phandles to usb2_refclk
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: ref
+
+  id-gpio:
+    description:
+      GPIO to be used as ID pin
+    maxItems: 1
+
+  interrupts:
+    description:
+      interrupt line to be used for detecting changes in VBUS
+
+  ti,vbus-divider:
+    description:
+      Should be present if USB VBUS line is connected to the
+      VBUS pin of the SoC via a 1/3 voltage divider.
+    type: boolean
+
+  ti,syscon-phy-pll-refclk:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: Phandle to the SYSCON entry
+          - description: USB phy control register offset within SYSCON
+    description: Specifier for configuring frequency of ref clock input.
+
+  '#address-cells':
+    const: 2
+
+  '#size-cells':
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - power-domains
+  - clocks
+  - clock-names
+  - interrupts
+  - ti,syscon-phy-pll-refclk
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/ti,sci_pm_domain.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    bus {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      dwc3-usb@...0000 {
+        compatible = "ti,am62-usb";
+        reg = <0x00 0x0f910000 0x00 0x800>;
+        interrupts = <GIC_SPI 234 IRQ_TYPE_LEVEL_HIGH>; /* MISC IRQ */
+        clocks = <&k3_clks 162 3>;
+        clock-names = "ref";
+        ti,syscon-phy-pll-refclk = <&wkup_conf 0x4018>;
+        power-domains = <&k3_pds 179 TI_SCI_PD_EXCLUSIVE>;
+        id-gpio = <&main_gpio1 51 GPIO_ACTIVE_LOW>;
+        #address-cells = <2>;
+        #size-cells = <2>;
+      };
+    };
-- 
2.17.1