Re: [RFC PATCHv2 1/4] drivers/otp: add initial support for OTP memory

Arnd Bergmann
2011-03-25T22:02:03Z

On Friday 25 March 2011 22:12:46 Greg KH wrote:
> > Why is this a bus? You don't have any device matching code or similar,
> > and the devices typically are on an existing bus_type (e.g. platform_bus).
> > I think it would make more sense to do this as a class.
>
> No, for new things, we want to use busses instead of classes please.
> Especially as this does create devices, which are best put on a bus
> somewhere.

I don't understand. Isn't that rather inconsistent?

I realize the same thing came up with the IIO subsystem, where I also
didn't understand it.

In my mental model of Linux drivers, a bus is something that physically
connects devices and the bus code matches devices with drivers, while a
class groups logical devices that get created by the driver itself.

Arnd