Hi Marek, [email protected] wrote on Wed, 2 Aug 2023 14:46:54 +0200:
> Extend the driver core to perform lookup by both OF node and driver > bound to the node. Use this to look up specific device instances to > unbind from nodes in the unbind command. One example where this is > needed is USB peripheral controller, which may have multiple gadget > drivers bound to it. The unbind command has to select that specific > gadget driver instance to unbind from the controller, not unbind the > controller driver itself from the controller. > > USB ethernet gadget usage looks as follows with this change. Notice > the extra 'usb_ether' addition in the 'unbind' command at the end. > " > bind /soc/usb-otg@49000000 usb_ether > setenv ethact usb_ether > setenv loadaddr 0xc2000000 > setenv ipaddr 10.0.0.2 > setenv serverip 10.0.0.1 > setenv netmask 255.255.255.0 > tftpboot 0xc2000000 10.0.0.1:test.file > unbind /soc/usb-otg@49000000 usb_ether This extra parameter does not seem to work on the BBBW. I cannot select the "usb_ether" driver like you do. Good news though, I am now able to use fastboot, but it is not straightforward: Here is my sequence right after the boot (reducing the dm tree output to the usb nodes for clarity): => dm tree misc 0 [ + ] ti-musb-wrapper | |-- usb@47400000 usb 0 [ + ] ti-musb-peripheral | | |-- usb@47401000 ethernet 1 [ + ] usb_ether | | | `-- usb_ether bootdev 3 [ ] eth_bootdev | | | `-- usb_ether.bootdev usb 0 [ ] ti-musb-host | | `-- usb@47401800 => fastboot usb 0 couldn't find an available UDC g_dnl_register: failed!, error: -19 exit not allowed from main input shell. => unbind /ocp/usb@47400000/usb@47401000 usb_ether Cannot find a device with path /ocp/usb@47400000/usb@47401000 => unbind /ocp/usb@47400000/usb@47401000 => dm tree misc 0 [ + ] ti-musb-wrapper | |-- usb@47400000 usb 0 [ ] ti-musb-host | | `-- usb@47401800 => fastboot usb 0 => bind /ocp/usb@47400000/usb@47401000 ti-musb-peripheral => dm tree misc 0 [ + ] ti-musb-wrapper | |-- usb@47400000 usb 0 [ ] ti-musb-host | | |-- usb@47401800 usb 0 [ ] ti-musb-peripheral | | `-- usb@47401000 => fastboot usb 0 musb-hdrc: peripheral reset irq lost! # works! (the irq-related line above as always been there) So now, how do we make this process easy/understandable? Thanks, Miquèl
