Hi,

On Mon, Aug 22, 2016 at 11:52:56PM +0100, One Thousand Gnomes wrote:

quoted

There are usb-serial devices, which could benefit from support
btw. I would find it really useful, if the Dangerous Prototype's
Bus Pirate would expose native /dev/i2c and /dev/spi and it's
based on FT232.

That should just need an ldisc.

Right, since it does not need any extra resources. Probably not the
best example.

I2C and SPI should at this point be sane for hotplugging as needed
for an ldisc.

I guess hotplugging support in the downstream kernel frameworks
would be needed anyway with usb-serial being USB based.

And having an ldisc also has another nice effect. You can plug the bus
pirate into a remote machine, run an 8bit clean link over a pty/tty pair
half way around the world and get a local i2c/spi to the remote machine's
i2c/spi bus pirate ports and devices.

Right.

It also means that if Bus Pirate 5 changes USB uart nothing breaks.

And it means no auto-support. Which would be fine in case of Bus
Pirate, since its mainly a developer device and some people may
actually prefer the IMHO anoying serial interface.

Let's forget that example.

-- Sebastian