TDA4VH-Q1: USB2.0 Enabling

Hi Iranna

There is only one USB controller in TDA4VH and that is mux between root hub and type c. 

You can make USB2.0_MUX_SEL pin as high to enable the 2.0 USB 

for reference in linux you can do gpio hogging in similar fashion.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1176106/j7200xsomxevm-usb-interfaces/4435185#4435185

Regards
Diwakar

Hi Diwakar,

We followed link you shared and updated device tree with required changes please find the changes made given below

gpio@22 {
        compatible = "ti,tca6424";
		reg = <0x22>;
		gpio-controller;
		#gpio-cells = <0x2>;
		gpio-line-names = "R_GPIO_RGMII1_RST", "ENET2_I2CMUX_SEL", "GPIO_USD_PWR_EN", "USBC_PWR_EN", "USBC_MODE_SEL1", "USBC_MODE_SEL0", "GPIO_LIN_EN", "R_CAN_STB", "CTRL_PM_I2C_OE#", "ENET2_EXP_PWRDN", "ENET2_EXP_SPARE2", "CDCI2_RSTZ", "USB2.0_MUX_SEL", "CANUART_MUX_SEL0", "CANUART_MUX2_SEL1", "CANUART_MUX1_SEL1", "ENET1_EXP_PWRDN", "ENET1_EXP_RESETZ", "ENET1_I2CMUX_SEL", "ENET1_EXP_SPARE2", "ENET2_EXP_RESETZ", "USER_INPUT1", "USER_LED1", "USER_LED2";
		phandle = <0x83>;

		usb_hub@0 {
				gpio-hog;
				gpios = <0x0 0x0e>;
				output-high;
				line-name = "USB2.0_MUX_SEL";
			};
		};

But still the USB2.0 is not detected still the USB 3.1 is active. Please look at the changes we made is correct or not to enable the USB2.0.

Thanks & Regards,

Iranna

Hi Iranna

Is it working now ?

Note: The reference was given for the J7200 so do the similar changes according to the TDA4VH.

Regards
Diwkakar

No Diwakar, It is not working we have changed the gpio no from P0 to P14(0xe) in device tree.

K3-J784s4-evm.zip Please find the attachment

Hi Iranna

Have you tried enabling the gpio form the sysfs ?

Regards
Diwakar

Hi diwakar,

We didn't enabled gpio from sysfs,
Is it needed to enable from sysfs?

Thanks & Regards,
Iranna

HI Iranna

for testing purpose you can make the gpio high for the sysfs entry and see you enabling the correct gpio 

once it start working you can hot that gpio in the dtsi.

Regards
Diwakar

Hi Diwakar,

This gpio pin is connected via the GPIO expander tca6424 and we can control the gpio via I2C0.

Is there any way to change this pin via sysfs? If it is possible please share the information.

Thanks

Iranna