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Subject[PATCH v2 1/2] dt-bindings: usb: Document the Allwinner H6 DWC3 glue
Date
The RST_BUS_XHCI reset line in the H6 affects both the DWC3 core and the
USB3 PHY. This suggests the reset line controls the USB3 IP as a whole.
Represent this by attaching the reset line to a glue layer device.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
.../usb/allwinner,sun50i-h6-dwc3.yaml | 75 +++++++++++++++++++
1 file changed, 75 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/allwinner,sun50i-h6-dwc3.yaml

diff --git a/Documentation/devicetree/bindings/usb/allwinner,sun50i-h6-dwc3.yaml b/Documentation/devicetree/bindings/usb/allwinner,sun50i-h6-dwc3.yaml
new file mode 100644
index 000000000000..936b5c74043f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/allwinner,sun50i-h6-dwc3.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/allwinner,sun50i-h6-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner H6 DWC3 USB controller
+
+maintainers:
+ - Chen-Yu Tsai <wens@csie.org>
+ - Maxime Ripard <mripard@kernel.org>
+
+properties:
+ compatible:
+ const: allwinner,sun50i-h6-dwc3
+
+ "#address-cells": true
+
+ "#size-cells": true
+
+ ranges: true
+
+ resets:
+ maxItems: 1
+
+# Required child node:
+
+patternProperties:
+ "^phy@[0-9a-f]+$":
+ $ref: ../phy/allwinner,sun50i-h6-usb3-phy.yaml#
+
+ "^usb@[0-9a-f]+$":
+ $ref: snps,dwc3.yaml#
+
+required:
+ - compatible
+ - ranges
+ - resets
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/sun50i-h6-ccu.h>
+ #include <dt-bindings/reset/sun50i-h6-ccu.h>
+
+ usb3: usb@5200000 {
+ compatible = "allwinner,sun50i-h6-dwc3";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ resets = <&ccu RST_BUS_XHCI>;
+
+ dwc3: usb@5200000 {
+ compatible = "snps,dwc3";
+ reg = <0x05200000 0x10000>;
+ interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&ccu CLK_BUS_XHCI>,
+ <&ccu CLK_BUS_XHCI>,
+ <&rtc 0>;
+ clock-names = "ref", "bus_early", "suspend";
+ dr_mode = "host";
+ phys = <&usb3phy>;
+ phy-names = "usb3-phy";
+ };
+
+ usb3phy: phy@5210000 {
+ compatible = "allwinner,sun50i-h6-usb3-phy";
+ reg = <0x5210000 0x10000>;
+ clocks = <&ccu CLK_USB_PHY1>;
+ resets = <&ccu RST_USB_PHY1>;
+ #phy-cells = <0>;
+ };
+ };
--
2.26.3
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