USB1_EN_OC Pin is LOW in our custom board

[sumin.lee]

Hello,

We want to use USB1_EN_OC pin to HIGH, but it LOW on our custom board.
And this pin works on Dev Kit.
The device tree and pinmux are same as I known, because we flash same image.

I think It doesn’t need to modify pinmux setting for USB1_EN_OC.
So, I don’t understand. Why is this signal LOW ?

I know the consideration about INA3221 ([Jetson/TX2 USB - eLinux.org]).
But it looks not related to USB1_EN_OC.

The vbus_en1_oc is sat as follows

		vbus_en1_oc_passthrough {
			phandle = <0xab>;
			linux,phandle = <0xab>;

			usb_vbus_en1_pl5 {
				nvidia,enable-input = <0x1>;
				nvidia,pins = "usb_vbus_en1_pl5";
				nvidia,tristate = <0x0>;
				nvidia,io-high-voltage = <0x1>;
				nvidia,function = "usb";
			};
		};

		vbus_en1_default {
			phandle = <0xa7>;
			linux,phandle = <0xa7>;

			usb_vbus_en1_pl5 {
				nvidia,enable-input = <0x1>;
				nvidia,pins = "usb_vbus_en1_pl5";
				nvidia,io-high-voltage = <0x1>;
				nvidia,function = "rsvd1";
			};
		};

		vbus_en1_oc_tristate {
			phandle = <0xa9>;
			linux,phandle = <0xa9>;

			usb_vbus_en1_pl5 {
				nvidia,enable-input = <0x1>;
				nvidia,pins = "usb_vbus_en1_pl5";
				nvidia,tristate = <0x1>;
				nvidia,io-high-voltage = <0x1>;
				nvidia,function = "usb";
			};
		};

extracted_tx2.dts (499.2 KB)

Do you think it needs to modify device tree or pinmux for USB1_EN_OC?

[WayneWWW]

What do you want to do here? Is it related to controlling the usb power?

[sumin.lee]

This is the USB circuit.

Yes, we need it enabling for using USB.

[WayneWWW]

1. For the document, please refer to adaptation guide
   Welcome — Jetson Linux<br/>Developer Guide 34.1 documentation

2. Please check keywords “vbus-supply = <&vdd_usb1_5v>”. You need to let the driver to control the pin. Not just control it by yourself through pinmux. If want to detect the over current, also need to set nvidia,oc-pin = <1>;.

[sumin.lee]

Regulators are sat in the dts file what i shared on the top as follows :

	pinctrl@3520000 {
                ...
       		vbus-1-supply = <0xad>;
                ...
		vbus-0-supply = <0xac>;
                ...
        }

		regulator@4 {
			regulator-enable-ramp-delay = <0x3b1>;
			compatible = "regulator-fixed-sync";
			gpio-open-drain;
			enable-active-high;
			gpio = <0x1b 0x5c 0x0>;
			regulator-disable-ramp-delay = <0xa5a>;
			phandle = <0xac>;
			regulator-min-microvolt = <0x4c4b40>;
			reg = <0x4>;
			regulator-max-microvolt = <0x4c4b40>;
			regulator-name = "vdd-usb0-5v";
			linux,phandle = <0xac>;
		};

		regulator@5 {
			regulator-enable-ramp-delay = <0x320>;
			compatible = "regulator-fixed-sync";
			gpio-open-drain;
			enable-active-high;
			gpio = <0x1b 0x5d 0x0>;
			regulator-disable-ramp-delay = <0x32c8>;
			phandle = <0xad>;
			regulator-min-microvolt = <0x4c4b40>;
			reg = <0x5>;
			regulator-max-microvolt = <0x4c4b40>;
			regulator-name = "vdd-usb1-5v";
			linux,phandle = <0xad>;
		};

Regulator looks OK.

And USB ports are sat as follow :

		ports {
			usb3-0 {
				status = "okay";
				nvidia,usb2-companion = <0x1>;
			};

			hsic-0 {
				status = "disabled";
			};

			usb2-2 {
				vbus-supply = <0xae>;
				mode = "host";
				status = "okay";
			};

			usb2-0 {
				vbus-supply = <0xac>;
				mode = "otg";
				status = "okay";
				nvidia,oc-pin = <0x0>;
			};

			usb3-1 {
				status = "disabled";
				nvidia,usb2-companion = <0x1>;
			};

			usb2-1 {
				vbus-supply = <0xad>;
				mode = "host";
				status = "okay";
				nvidia,oc-pin = <0x1>;
			};

			usb3-2 {
				status = "disabled";
			};
		};

We are using USB1_DN/DP.
So, ‘usb2-1’ port looks OK.

I confused, what can i change?

There are some more configuration about usb.
Does anything need to change?

		pinmux {
                        ...
			usb2-micro-AB {
				nvidia,lanes = "otg-0";
				nvidia,port-cap = <0x3>;
				nvidia,function = "xusb";
				nvidia,oc-pin = <0x0>;
			};

			usb2-std-A-port2 {
				nvidia,lanes = "otg-1";
				nvidia,port-cap = <0x1>;
				nvidia,function = "xusb";
				nvidia,oc-pin = <0x1>;
			};

			usb3-std-A-port2 {
				nvidia,lanes = "usb3-1";
				nvidia,port-cap = <0x1>;
				nvidia,oc-pin = <0x1>;
			};

			e3325-usb3-std-A-HS {
				nvidia,lanes = "otg-2";
				nvidia,port-cap = <0x1>;
				status = "disabled";
				nvidia,function = "xusb";
			};
		};

[WayneWWW]

Read the document and it will tell.