On Fri, Oct 6, 2023 at 2:34 AM Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > If you only want your code being used in Linux, then stick with > "GPL-2.0". If you want your code to be able to be copied into other > GPLv3 licensed code bodies (like Hurd and others), then license it as > "GPL-2.0-or-later". Your call. Thanks. From that point of view I prefer GPL-2.0-or-later. > > > Yes, but not all do. If you don't need to do anything special, it can > > > just claim to be a normal device, we've had threads about this on the > > > list before. If you don't need to determine in userspace from the tty > > > connection what device it is, just use the default one instead. > > > > Ok, it looks like having > > > > #define PORT_ESP32ACM (-1) > > > > in the driver source should be ok? I've tested that it works. > > Hah, I like that hack. But why not just use PORT_UNKNOWN? A lot of functionality doesn't work with PORT_UNKNOWN, e.g. console or modem control. I've got the idea of using -1 from this email: https://lore.kernel.org/linux-serial/502240f7-2cac-4fe6-9e27-f9861db3666d@xxxxxxxxxxxxxxxx/ -- Thanks. -- Max