USBOTG_HS and FUSB302 device tree porblem.

[jasonj2]

Hello,

I am developing on a custom STM32MP151AAC board, the software is openstlinux-5.15-yocto-kirkstone-mp1-v22.11.23. The board successfully booted, and most of the part works fine. The problem is I cannot make USBOTG run. My board use FUSB302 instead STUSB1600.

Now, the problem is I cannot make a usable device tree for usbotg_hs and fusb302, the kernel always complains

OF: graph: no port node found in /soc/i2c@5c002000/typec-portc@22

I had try my best to find where the problem is but without success. The device tree file and dmesg are attached in the thread.  Could anyone give me some suggestions?

Thanks.

[PatrickF]

Hi @jasonj2 

Did you have a look to https://wiki.st.com/stm32mpu/wiki/OTG_device_tree_configuration#DT_configuration_example_as_high_speed_OTG,_with_Type-C_connector ?

Maybe you simply have issue with i2C board configuration (in DT or in HW).

Regards

[jasonj2]

Hi PatrickF,

The device tree attached in the original post is according to the link you provided. The FUSB302 is attached to I2C4, the PMIC (axp209) is attached to I2C4 also. I can confirm that the axp209 is working well, so the I2C4 bus can be assumed works OK.

I use STM32CubeMX to generate the DTSs, and modified according my custom board. Here is the fragment of the DTS related to usbotg_hs and FUSB302. The full DTS and dmesg are attached in the original post.

&usbotg_hs{
	status = "okay";

	/* USER CODE BEGIN usbotg_hs */
	/* Use USBPHYC HS PHY port #2, 
	 * configure UTMI switch to select USBOTG controller */
	phys = <&usbphyc_port1 0>;
	phy-names = "usb2-phy";
	usb-role-switch;
	role-switch-default-mode = "peripheral";

	port {
		usbotg_hs_ep: endpoint {
			remote-endpoint = <&con_usbotg_hs_ep>;
		};
	};
	/* USER CODE END usbotg_hs */
};

&i2c4{
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&i2c4_pins_z_mx>;
	pinctrl-1 = <&i2c4_sleep_pins_z_mx>;
	status = "okay";

	/* USER CODE BEGIN i2c4 */
	i2c-scl-rising-time-ns = <185>;
	i2c-scl-falling-time-ns = <20>;
	clock-frequency = <100000>;
        ...
        ...
	fusb0: typec-portc@22 {
		compatible = "fcs,fusb302", "fairchild,fusb302";
		reg = <0x22>;

		pinctrl-0 = <&fusb0_int_a>;
		pinctrl-names = "default";
		interrupt-parent = <&gpioi>;
		interrupts = <11 IRQ_TYPE_LEVEL_LOW>;

		vbus-supply = <&v5v_typec>;
		vbus = <&v5v_typec>;

		status = "okay";

		connector {
			compatible = "usb-c-connector";
			data-role = "dual";
			label = "USB-C";
			op-sink-microwatt = <5000000>;
			power-role = "dual";
			power-opmode = "default";
			sink-pdos =
				<PDO_FIXED(5000, 2000, PDO_FIXED_USB_COMM)>;
			source-pdos =
				<PDO_FIXED(5000, 1000, PDO_FIXED_USB_COMM)>;
			try-power-role = "sink";
			dr_mode = "peripheral";
			role-switch-default-mode = "peripheral";  

			// ports {
			// 	#address-cells = <1>;
			// 	#size-cells = <0>;

			// 	port@0 {
			// 		reg = <0>;
			// 		con_usbotg_hs_ep: endpoint {
			// 			remote-endpoint = <&usbotg_hs_ep>;
			// 		};
			// 	};
			// };

			port {
				con_usbotg_hs_ep: endpoint {
					remote-endpoint = <&usbotg_hs_ep>;
				};
			};
		};
	};
	/* USER CODE END i2c4 */
};

There is only one line that is related to the FUSB302 which is 

OF: graph: no port node found in /soc/i2c@5c002000/typec-portc@22

It looks like because the device tree the kernel even not try to probe the FUSB302.  But I did configure the port and connection between usbotg_hs and fusb302.  It is strange, I cannot figure out where the problem is.

[PatrickF · Accepted solution]

Hi @jasonj2 

I'm not expert in that, so I cannot help you more. I assume it is a generic Linux Device Tree issue.

Regards.

[jasonj2]

Hi PatrickF,

Maybe there is problems in the device tree, I will check it.

Thank you very much for your quick response. 

Regards.