[RFC/PATCH 0/22] W1: sysfs, lifetime and other fixes

Greg KH gregkh at suse.de
Tue Apr 26 08:58:39 CEST 2005

On Mon, Apr 25, 2005 at 11:32:14AM -0500, Dmitry Torokhov wrote:
> On 4/25/05, Evgeniy Polyakov <johnpol at 2ka.mipt.ru> wrote:
> > On Thu, 2005-04-21 at 09:31 -0500, Dmitry Torokhov wrote:
> > >
> > > OK, that is what I am aying. But why do you need that attribute with
> > > variable name and a bin attribute that is not really bin but just a
> > > dump for all kind of data (looks like debug one).
> > 
> > bin attribute was created for lm_sensors scripts format - it only caches
> > read value.
> > I think there might be only 2 "must have" methods - read and write.
> > I plan to implement them using connector, so probably they will go away
> > completely.
> ...
> > > You will not be able to cram all 1-wire devices into unified
> > > interface. You will need to build classes on top of it and you might
> > > use connector (I am not sure) bit not on w1 bus level.
> > > ...
> > 
> > connector allows to have different objects inside one netlink group,
> > so it will use it in that way.
> > I think only two w1 methods must exist - read and write,
> > and they must follow protocol, defined in family driver.
> No, I think there should not be any "must have" methods on w1_bus
> level. What you really need (and this needs to be coordinated with
> other sensors people) is a "sensors" class hierarchy that will define
> classes like "temperature sensor", "fan", "vid", etc. Then your w1
> family drivers, when bound to a slave, will create needed class
> devices. i2c drivers will do the same, and your superio, and I'll be
> able to change i8k driver just for kicks. Then your usespace would not
> care what _bus_ a particular sensor is sittign on and will be
> presented with a unified interface.

Yes, that is the way to go, and is what a number of people are currently
working on implementing.


greg k-h

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