On Thu, Jul 18, 2013 at 11:33:17AM +0530, Kishon Vijay Abraham I wrote:
> >> Wanted to group all the PHY drivers to be used by different subsystems
> >> (SATA/USB/PCIE/HDMI/VIDEO) into a single entity. There were some comments 
> >> in my
> >> initial version [3] on using a bus_type instead of class but then it was
> >> decided to go with class itself.
> >>
> >> [3] -> http://lkml.indiana.edu/hypermail/linux/kernel/1302.2/01389.html
> > 
> > Ok, but what does the class usage get you?
> 
> hmm.. actually I use class only to iterate through the list of devices in 
> *phy*
> class which could very well be implemented using list. Just that I wont have a
> /sys/class/phy/ entry to find the list of phys added in the system. I dont
> think I want to add any other stuff to expose to the user space at this point
> of time.
> > 
> >>> When modifying/adding new sysfs stuff, you need a Documentation/ABI/
> >>> entry as well.
> >>
> >> I'm not actually adding any new sysfs entry other than what a 
> >> *class_create*
> >> must have created. Do I need to add one for that?
> > 
> > If you are not creating anything in sysfs at all, why use the driver
> > model?  (hint, I think you need to do something here to justify it...)
> 
> Well.. it helps me to use pm_runtime to enable clocks utilizing the
> parent-child relationship.

Ok, that's a good reason for this, nevermind then.  Care to send the
latest patches you have in emails so I can review them?

thanks,

greg k-h
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