Re: PMBus support in Linux

[Guenter Roeck <guenter.roeck@ericsson.com>]

On Fri, May 28, 2010 at 10:34:01PM -0400, Wolfram Sang wrote:
> 
> CCing lm-sensors and David...
> 
> On Fri, May 28, 2010 at 09:16:31AM -0700, Guenter Roeck wrote:
> 
> > does anyone know if there is an effort to add infrastructure for PMBus
> > support (or support for specific PMBus devices) to Linux ?
> 
> I found this:
> 
> http://lists.lm-sensors.org/pipermail/lm-sensors/2008-April/022969.html
> 
I found that as well, but that was about it. Not sure if I want to use it
as a starting point or even for reference since it is gplv3.
Probably useful for debugging, though.

> Hmm, sitting ontop of SMBus, it makes perfect sense to use i2c-dev (David knows
> what he is doing, of course ;)). But having no repo and all, it is hard to
> maintain this utility. Is there any chance to pick it up in the kernel-tree?
> tools/i2c/ or such? Hmm, it's GPL v3...
> 
Maybe there is now more interest in kernel driver support - looks like there
are several PMBus chips available today.

If there is no activity yet, question is if I should write individual drivers or 
if I should define a PMBus infrastructure on top of i2c/smbus first.
Any thoughts on which approach would be more likely to be accepted into the kernel ?

Guenter

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