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J721EXSOMXEVM: USB 2.0 not working- Device tree help for mapped Signals

Satish Lal Das2
Expert 1900 points
Part Number: J721EXSOMXEVM

Hello,

We have 2xUSB 2.0 on our custom board. PinMux tool has been used to map signals for USB 2.0. However the device tree files(i.e. dts or .c & .h) generated by pinmux tool doesn't have any code mapped to USB 2.0 Pins/Balls. 

For instance I did not find PADCONFIG associated for ball number AJ5 from J721e Datasheet : https://www.ti.com/lit/ds/symlink/tda4vm.pdf?ts=1593521450358&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTDA4VM&_ticdt=MTYwOTgyODc1NnwwMTc0NWFkZWM0NzEwMDI5OGQ0NmY2ZjQxMDkyMDMwNjgwMDVhMDYwMDBiZDB8R0ExLjIuMTQwNDAzMzMzNC4xNTk5MjUyMzgzfDA 

Could you please let me know how I can find the Pad number associated with these Ball numbers and how can we generate these changes in device tree?

Please let me know if you need some more information from my side.

Thank You,

Satish

  • 0
    TI__Mastermind 38712 points

    Hi Satish,

    Regarding - "For instance I did not find PADCONFIG associated for ball number AJ5 from J721e Datasheet", please refer the table 6.1 on page 66.

    See -> BALL NUMBER = AJ5, BALL NAME = usb0_dm and SIGNAL NAME = USB0_DM.

    Also, on page 100, Table 6-76. "USB0 Signal Descriptions" and Table 6-77. "USB1 Signal Descriptions", provide clear details on this.

    Ideally the device tree entries for usb0_dm, usb0_dp will not change and hence you must refer the default DT files provided as part of the TI Processor SDK Linux release for J721E platform.

    Thanks.