Hi, On 24-10-28, Marco Felsch wrote: > Hi Greg, > > On 24-10-01, Greg Kroah-Hartman wrote: > > On Tue, Oct 01, 2024 at 09:24:53AM +0200, Marco Felsch wrote: > > > Hi, > > > > > > gentle ping as this is series is two months old now. > > > > And it was rejected as serdev does not support hotplug which of course, > > usb-serial does. > > I hoped to get some feedback on my answer [1]. Regarding hotplug > support: serdev _requires_ some sort of firmware like OF (not sure if it > does work with ACPI too). That said, if serdev finds no firmware a > fallback is provided to the standard serial handling. > > The firmware could either be added directly by the platform OF file or > via OF-overlays. By making use of overlays we could gain some kind of > hotplug: Once a usb devices was detected and the driver has an > overlay, the overlay gets applied and the probe continues, like we do it > for PCIe devices now [2]. For devices which don't have a registered > overlay the standard usb-serial setup is done by exposing the serial > interface to the userspace. is this idea worth to give it a try for a v2 or do you have something different in mind? I'm happy for any input. Regards, Marco > > So until serdev is fixed up to handle that correctly, this is not going > > anywhere, nor should you want it to as then you would be in charge of > > code that does not work properly :) > > Regards, > Marco > > [1] https://lore.kernel.org/all/20240917044948.i2eog4ondf7vna7q@xxxxxxxxxxxxxx/ > [2] https://lore.kernel.org/all/7512cbb7911b8395d926e9e9e390fbb55ce3aea9.camel@xxxxxxxxxxxxxx/ > > > > > thanks, > > > > greg k-h > >
