arm: dts: qcom: db410c: Enable USB OTG support

The Dragonboard-410c is able to act either as USB Host or Device.
The role can be determined at runtime via the USB_HS_ID pin which is
derived from the micro-usb port VBUS pin.

In Host role, SoC USB D+/D- are routed to the onboard USB 2.0 HUB.
In Device role, SoC USB D+/D- are routed to the USB 2.0 micro B port.
Routing is selected via USB_SW_SEL_PM gpio.

In device role USB HUB can be held in reset.

chipidea driver expects two extcon device pointers, one for the
EXTCON_USB event and one for the EXTCON_USB_HOST event. Since
the extcon-usb-gpio device is capable of generating both these
events, point two times to this extcon device.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1576083014-5842-1-git-send-email-loic.poulain@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/apq8016-sbc-pmic-pins.dtsi

@@ -5,6 +5,15 @@
 &pm8916_gpios {
 
 	usb_hub_reset_pm: usb_hub_reset_pm {
+		pinconf {
+			pins = "gpio3";
+			function = PMIC_GPIO_FUNC_NORMAL;
+			input-disable;
+			output-high;
+		};
+	};
+
+	usb_hub_reset_pm_device: usb_hub_reset_pm_device {
 		pinconf {
 			pins = "gpio3";
 			function = PMIC_GPIO_FUNC_NORMAL;
@@ -22,6 +31,16 @@ pinconf {
 		};
 	};
 
+	usb_sw_sel_pm_device: usb_sw_sel_pm_device {
+		pinconf {
+			pins = "gpio4";
+			function = PMIC_GPIO_FUNC_NORMAL;
+			power-source = <PM8916_GPIO_VPH>;
+			input-disable;
+			output-low;
+		};
+	};
+
 	pm8916_gpios_leds: pm8916_gpios_leds {
 		pinconf {
 			pins = "gpio1", "gpio2";

arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi

@@ -358,14 +358,15 @@ sdhci@7864000 {
 		};
 
 		usb@78d9000 {
-			extcon = <&usb_id>;
+			extcon = <&usb_id>, <&usb_id>;
 			status = "okay";
 			adp-disable;
 			hnp-disable;
 			srp-disable;
-			dr_mode = "host";
-			pinctrl-names = "default";
-			pinctrl-0 = <&usb_sw_sel_pm>;
+			dr_mode = "otg";
+			pinctrl-names = "default", "device";
+			pinctrl-0 = <&usb_sw_sel_pm &usb_hub_reset_pm>;
+			pinctrl-1 = <&usb_sw_sel_pm_device &usb_hub_reset_pm_device>;
 			ulpi {
 				phy {
 					v1p8-supply = <&pm8916_l7>;
@@ -504,7 +505,7 @@ usb2513 {
 
 	usb_id: usb-id {
 		compatible = "linux,extcon-usb-gpio";
-		vbus-gpio = <&msmgpio 121 GPIO_ACTIVE_HIGH>;
+		id-gpio = <&msmgpio 121 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&usb_id_default>;
 	};