linux-kernel - [PATCH v3 6/9] dt-bindings: phy: add binding for Allwinner USB3 PHY

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Date:   Sun, 22 Jul 2018 13:57:36 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Kishon Vijay Abraham I <kishon@...com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com,
        Icenowy Zheng <icenowy@...c.io>
Subject: [PATCH v3 6/9] dt-bindings: phy: add binding for Allwinner USB3 PHY

The new Allwinner H6 SoC contains a USB3 PHY that is wired to the
external USB3 pins of the SoC.

Add a device tree binding for the PHY.

Signed-off-by: Icenowy Zheng <icenowy@...c.io>
Reviewed-by: Chen-Yu Tsai <wens@...e.org>
---
Changes in v3:
- Added Chen-Yu's Review tag.

Rob,
Although you mentioned that the supply is for the port, not the phy;
currently in USB situation "powering on the PHY" also indicates
"powering on the port" and nearly all usages of phy-supply is for Vbus.

Maybe we should change the overall phy-supply to satisfy this.

Thanks,
Icenowy

 .../bindings/phy/sun50i-usb3-phy.txt          | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt

diff --git a/Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt b/Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt
new file mode 100644
index 000000000000..912d55f9f69d
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt
@@ -0,0 +1,24 @@
+Allwinner sun50i USB3 PHY
+-----------------------
+
+Required properties:
+- compatible : should be one of
+  * allwinner,sun60i-h6-usb3-phy
+- reg : a list of offset + length pairs
+- #phy-cells : from the generic phy bindings, must be 0
+- clocks : phandle + clock specifier for the phy clock
+- resets : phandle + reset specifier for the phy reset
+
+Optional Properties:
+- phy-supply : from the generic phy bindings, a phandle to a regulator that
+	       provides power to VBUS.
+
+Example:
+	usb3phy: phy@...0000 {
+		compatible = "allwinner,sun50i-h6-usb3-phy";
+		reg = <0x5210000 0x10000>;
+		clocks = <&ccu CLK_USB_PHY1>;
+		resets = <&ccu RST_USB_PHY1>;
+		#phy-cells = <0>;
+		status = "disabled";
+	};
-- 
2.18.0