On Tuesday 19 February 2013, Felipe Balbi wrote: > On Tue, Feb 19, 2013 at 02:34:40PM +0000, Arnd Bergmann wrote: > > On Tuesday 19 February 2013, Felipe Balbi wrote: > > > On Tue, Feb 19, 2013 at 12:33:54PM +0000, Arnd Bergmann wrote: > > It's a fine line, but I think a phy is something that resembles a device > > more than an LED does. When I read patch 1, I also noticed and commented > > on the fact that it does use a 'class'. Now, according to Greg, we should > > use 'bus_type' instead of 'class' in new code. I originally disagreed with > > that concept, but he's the boss here and it's good if he has a vision > > how things should be lined out. > > > > In practice, there is little difference between a 'bus_type' and a 'class', > > so just replace any instance of the former with the latter in your head > > when reading the code ;-) > > it's not so simple :-) if we must use bus_type we need to introduce all > the device/driver matching mechanism which isn't necessary with a class. I think the idea is to use a bus_type that has devices but no drivers associated with it, but I might be misremembering things. > > I understand that there is not a real common bus here, and the bus_type > > infrastructure would basically be used as a way to represent each PHY > > in sysfs and provide a way to enumerate and look them up inside of the > > kernel. > > right, but maybe we need another mechanism. If, in the long run we must > use bus_type, then eventually pwm, led, regulators, etc will all be > converted to bus_type. It will look quite weird IMHO. Yes, it would be a bit unusual, I agree. > Greg, can you pitch your suggestion here ? It would be great to hear > your rationale behind dropping class infrastructure, couldn't find > anything through Google and since feature-removal-schedule.txt has been > removed (without adding it to feature-removal-schedule.txt, I must add > :-) I don't know what's the idea behind removing classes. I believe for now, the idea is to not add any new classes, but keep the existing ones for compatibility. 'struct class_device' however was already removed and got turned into 'struct device'. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
