[v3,6/6] arm: dts: qcom: db410c: Enable USB OTG support

[v3,6/6] arm: dts: qcom: db410c: Enable USB OTG support

[Loic Poulain]

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>
---
 v2: no change
 v3: Point two times to the same extcon-usb-device

 arch/arm64/boot/dts/qcom/apq8016-sbc-pmic-pins.dtsi | 20 ++++++++++++++++++++
 arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi           | 11 ++++++-----
 2 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/apq8016-sbc-pmic-pins.dtsi b/arch/arm64/boot/dts/qcom/apq8016-sbc-pmic-pins.dtsi
index ec2f0de..99787cc 100644
--- a/arch/arm64/boot/dts/qcom/apq8016-sbc-pmic-pins.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8016-sbc-pmic-pins.dtsi
@@ -8,6 +8,16 @@
 		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;
+			input-disable;
 			output-low;
 		};
 	};
@@ -22,6 +32,16 @@
 		};
 	};
 
+	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";
diff --git a/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi b/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
index 78ce397..1f7dc1c 100644
--- a/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
@@ -366,14 +366,15 @@
 		};
 
 		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>;
@@ -512,7 +513,7 @@
 
 	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>;
 	};