Where to find the information how to write a state of the art USB driver?

[Greg KH]

On Thu, Jan 13, 2022 at 08:01:04PM +0100, Greg KH wrote:
> On Thu, Jan 13, 2022 at 07:54:19PM +0100, Philipp Hortmann wrote:
> > On 1/13/22 4:33 PM, Greg KH wrote:
> > > On Thu, Jan 13, 2022 at 07:39:38AM +0100, Philipp Hortmann wrote:
> > > > On 1/12/22 10:54 AM, Greg KH wrote:
> > > > > That driver tried to be an example for an unknown device, doing multiple
> > > > > different things that no single driver/device would probably ever need.
> > > > > Also it can almost always just be replaced with a simple userspace
> > > > > program using libusb, as I bet your driver could be replaced with as
> > > > > well, right?
> > > > Yes it can be replaced by a userspace program but even this is not required.
> > > It is an issue if you are trying to write a new driver.  We do not take
> > > new drivers into the kernel tree if they can be in the kernel instead.
> > > 
> > 
> > Sorry I did not clearly express what I plan to do. I plan to do maintenance
> > and bug fixes on the kernel.
> 
> That's wonderful, try starting out in drivers/staging/*/TODO for lots of
> things that need work.

And, there are USB drivers in there as well, if that is what you are
interested in working on.