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From: Samuel Holland <samuel@sholland.org>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@siol.net>,
	Andre Przywara <andre.przywara@arm.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev,
	Samuel Holland <samuel@sholland.org>
Subject: [PATCH 1/2] dt-bindings: usb: Document the Allwinner H6 DWC3 glue
Date: Tue, 20 Apr 2021 23:28:33 -0500	[thread overview]
Message-ID: <20210421042834.27309-2-samuel@sholland.org> (raw)
In-Reply-To: <20210421042834.27309-1-samuel@sholland.org>

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..86efd6d21ab4
--- /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
+---
+$id: http://devicetree.org/schemas/usb/allwinner,sun50i-h6-dwc3#
+$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]+$":
+    $ref: allwinner,sun50i-h6-usb3-phy.yaml#
+
+  "^usb@[0-9a-f]+$":
+    $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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  reply	other threads:[~2021-04-21  4:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21  4:28 [PATCH 0/2] Allwinner H6 USB3 device tree updates Samuel Holland
2021-04-21  4:28 ` Samuel Holland [this message]
2021-04-21 12:51   ` [PATCH 1/2] dt-bindings: usb: Document the Allwinner H6 DWC3 glue Rob Herring
2021-04-22  7:42     ` Maxime Ripard
2021-04-21  4:28 ` [PATCH 2/2] arm64: dts: allwinner: h6: Wrap DWC3 and PHY in glue layer Samuel Holland
2021-04-21  9:27 ` [PATCH 0/2] Allwinner H6 USB3 device tree updates Maxime Ripard

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