Hi Mahesh, On Mon, 20 Dec 2021 at 05:55, mahesh mv <mahesh...@yahoo.com> wrote: > > Hi all, > We have a board where we plan to connect 2 USB devices of MASS storage > class. One of the devices (3) is plugged in all the timebut the other USB is > hotplugged when ever its required. The issue we are facing is the device > number is not deterministic acrossreboots with uboot 2021 . Is there a way to > fix the Device 3 below as the first one all the time in DTS file or some > other mechanism in uboot. > Emerald:> versionU-Boot 2021.07--11625-ge998855ac2-dirty (Dec 07 2021 - > 23:22:27 +0530) > aarch64-broadcom-linux-gnu-gcc.br_real (Buildroot 2019.08) 8.3.0GNU ld (GNU > Binutils) 2.31.1 > > Emerald:> usb info 1: Hub, USB Revision 3.0 - U-Boot XHCI Host > Controller - Class: Hub - PacketSize: 512 Configurations: 1 - > Vendor: 0x0000 Product 0x0000 Version 1.0 Configuration: 1 - > Interfaces: 1 Self Powered 0mA Interface: 0 - Alternate > Setting 0, Endpoints: 1 - Class Hub - Endpoint 1 In > Interrupt MaxPacket 8 Interval 255ms 2: Hub, USB Revision 2.0 - > USB2.0 Hub - Class: Hub - PacketSize: 64 Configurations: 1 - > Vendor: 0x05e3 Product 0x0608 Version 96.112 Configuration: 1 > - Interfaces: 1 Self Powered Remote Wakeup 100mA Interface: 0 > - Alternate Setting 0, Endpoints: 1 - Class Hub - > Endpoint 1 In Interrupt MaxPacket 1 Interval 12ms 3: Mass Storage, > USB Revision 2.10 - SanDisk Ultra 040122c9e4a887e576fc7d3a05f5898 - > Class: (from Interface) Mass Storage - PacketSize: 64 Configurations: 1 > - Vendor: 0x0781 Product 0x5581 Version 1.0 Configuration: 1 > - Interfaces: 1 Bus Powered 224mA Interface: 0 - Alternate > Setting 0, Endpoints: 2 - Class Mass Storage, Transp. SCSI, Bulk > only - Endpoint 1 In Bulk MaxPacket 512 - Endpoint 2 Out > Bulk MaxPacket 512 4: Mass Storage, USB Revision 2.0 - Virtium > VTDU31XC008G-A901 P1T65005607903260051 - Class: (from Interface) Mass > Storage - PacketSize: 64 Configurations: 1 - Vendor: 0x2aaa Product > 0x0100 Version 1.0 Configuration: 1 - Interfaces: 1 Bus Powered > 100mA Interface: 0 - Alternate Setting 0, Endpoints: 2 > - Class Mass Storage, Transp. SCSI, Bulk only - Endpoint 1 In > Bulk MaxPacket 512 - Endpoint 1 Out Bulk MaxPacket 512
The output is a bit garbled. You can add USB devices to the devicetree if you like. See usb_scan_device() which calls usb_find_child() to find such a device. Regards, Simon > > Thanks,Mahesh
