dts: hi3660: Add support for basic usb gadget on Hikey960

This patch adds basic core dwc3, usb phy and rt1711h nodes for
usb support on Hikey960.

This does not enable the mux/hub functionality on the board, so
the USB-A host ports will not function, but does allow the USB-C
port to function in gadget mode (unfortunately not in host, as
the hub/mux functionality is needed to enable vbus output to
power devices in host mode).

This is based on an old patch originally by Yu Chen.

Cc: Yu Chen <chenyu56@huawei.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: YongQin Liu <yongqin.liu@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts

@@ -13,6 +13,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/usb/pd.h>
 
 / {
 	model = "HiKey960";
@@ -526,6 +527,48 @@ &i2c0 {
 &i2c1 {
 	status = "okay";
 
+	rt1711h: rt1711h@4e {
+		compatible = "richtek,rt1711h";
+		reg = <0x4e>;
+		status = "ok";
+		interrupt-parent = <&gpio27>;
+		interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&usb_cfg_func>;
+
+		usb_con: connector {
+			compatible = "usb-c-connector";
+			label = "USB-C";
+			data-role = "dual";
+			power-role = "dual";
+			try-power-role = "sink";
+			source-pdos = <PDO_FIXED(5000, 500, PDO_FIXED_USB_COMM)>;
+			sink-pdos = <PDO_FIXED(5000, 500, PDO_FIXED_USB_COMM)
+				PDO_VAR(5000, 5000, 1000)>;
+			op-sink-microwatt = <10000000>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				port@1 {
+					reg = <1>;
+					usb_con_ss: endpoint {
+						remote-endpoint = <&dwc3_ss>;
+					};
+				};
+			};
+		};
+		port {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			rt1711h_ep: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&dwc3_role_switch>;
+			};
+		};
+	};
+
 	adv7533: adv7533@39 {
 		status = "ok";
 		compatible = "adi,adv7533";
@@ -612,3 +655,32 @@ wlcore: wlcore@2 {
 		interrupts = <3 IRQ_TYPE_EDGE_RISING>;
 	};
 };
+
+&dwc3 { /* USB */
+	dr_mode = "otg";
+	maximum-speed = "super-speed";
+	phy_type = "utmi";
+	snps,dis-del-phy-power-chg-quirk;
+	snps,lfps_filter_quirk;
+	snps,dis_u2_susphy_quirk;
+	snps,dis_u3_susphy_quirk;
+	snps,tx_de_emphasis_quirk;
+	snps,tx_de_emphasis = <1>;
+	snps,dis_enblslpm_quirk;
+	snps,gctl-reset-quirk;
+	usb-role-switch;
+	role-switch-default-mode = "host";
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		dwc3_role_switch: endpoint@0 {
+			reg = <0>;
+			remote-endpoint = <&rt1711h_ep>;
+		};
+
+		dwc3_ss: endpoint@1 {
+			reg = <1>;
+			remote-endpoint = <&usb_con_ss>;
+		};
+	};
+};

arch/arm64/boot/dts/hisilicon/hi3660.dtsi

@@ -1152,6 +1152,40 @@ map1 {
 				};
 			};
 		};
+
+		usb3_otg_bc: usb3_otg_bc@ff200000 {
+			compatible = "syscon", "simple-mfd";
+			reg = <0x0 0xff200000 0x0 0x1000>;
+
+			usb_phy: usb-phy {
+				compatible = "hisilicon,hi3660-usb-phy";
+				#phy-cells = <0>;
+				hisilicon,pericrg-syscon = <&crg_ctrl>;
+				hisilicon,pctrl-syscon = <&pctrl>;
+				hisilicon,eye-diagram-param = <0x22466e4>;
+			};
+		};
+
+		dwc3: dwc3@ff100000 {
+			compatible = "snps,dwc3";
+			reg = <0x0 0xff100000 0x0 0x100000>;
+
+			clocks = <&crg_ctrl HI3660_CLK_ABB_USB>,
+				 <&crg_ctrl HI3660_ACLK_GATE_USB3OTG>;
+			clock-names = "ref", "bus_early";
+
+			assigned-clocks = <&crg_ctrl HI3660_ACLK_GATE_USB3OTG>;
+			assigned-clock-rates = <229000000>;
+
+			resets = <&crg_rst 0x90 8>,
+				 <&crg_rst 0x90 7>,
+				 <&crg_rst 0x90 6>,
+				 <&crg_rst 0x90 5>;
+
+			interrupts = <0 159 4>, <0 161 4>;
+			phys = <&usb_phy>;
+			phy-names = "usb3-phy";
+		};
 	};
 };