IEEE1588 Precision Time Protocol (PTP) driver for AMCC 405EZ

IEEE1588 Precision Time Protocol (PTP) driver for AMCC 405EZ

[Stefan Roese]

Hi all,

I'm in the stage of integrating an IEEE1588 PTP driver for the AMCC 405EZ PPC 
and looking for the correct location to place this driver in the Linux source 
tree. The driver is a character-driver that enables the user space 
applications to configure the time stamping unit and to read/write the 
timestamps.

Is "drivers/net/ptp" or "drivers/net/ieee1588" a good solution? Or should it 
go to "drivers/char/ptp" because of the chrdev nature of the driver?

Any suggestions welcome (could be that I missed an already existing example).

Best regards,
Stefan

Re: IEEE1588 Precision Time Protocol (PTP) driver for AMCC 405EZ

[Robert Schwebel]

On Mon, Apr 30, 2007 at 04:41:32PM +0200, Stefan Roese wrote:
> I'm in the stage of integrating an IEEE1588 PTP driver for the AMCC 405EZ PPC 
> and looking for the correct location to place this driver in the Linux source 
> tree. The driver is a character-driver that enables the user space 
> applications to configure the time stamping unit and to read/write the 
> timestamps.

Could you elaborate your overall concept for this class of drivers? I
assume it makes no sense to write an IEEE1588 driver especially for the
AMCC chip, because there will probably be a need to support it on any
capable hardware; for example the netX has 1588 support for precise
timestamping as well and so do others.

I'd prefer to discuss the needed functionality first, then find a common
set of lowlevel APIs and move most of the IEEE1588 related stuff into
userspace. It might also be a good idea to involve the RTnet in this
discusson.

> Is "drivers/net/ptp" or "drivers/net/ieee1588" a good solution? Or
> should it go to "drivers/char/ptp" because of the chrdev nature of the
> driver?

Please start with discussing the concept, not the names. It might end
being a part of the network drivers, without any special directory.

Robert
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