[PATCH 1/4 v2] i2c/gpio: add DT support

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:37 Mon 20 Feb     , Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:50 Mon 20 Feb     , Russell King - ARM Linux wrote:
> > On Mon, Feb 20, 2012 at 11:22:31AM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > On 10:08 Mon 20 Feb     , Russell King - ARM Linux wrote:
> > > > On Mon, Feb 20, 2012 at 10:58:13AM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > > > On 18:17 Mon 13 Feb     , Karol Lewandowski wrote:
> > > > > > > +	- udelay: delay between GPIO operations (may depend on each platform)
> > > > > > > +	- timeout: timeout to get data (ms)
> > > > > > 
> > > > > > 
> > > > > > If these are really needed then I would prefer to have these fully
> > > > > > qualified (with unit type "-ms/-millisecs" appended).
> > > > > > 
> > > > > > Regulator framework, with its "-microvolt/-microamp", serve here as
> > > > > > prime example of being quite descriptive (one doesn't neet to look up
> > > > > > the docs). Please see:
> > > > > > 
> > > > > >   http://permalink.gmane.org/gmane.linux.ports.arm.omap/67637
> > > > > timeout are usualy in ms I don't really see the need of -ms or so
> > > > 
> > > > Which is obviously total crap for udelay, which would be in _micro_seconds.
> > > agreed but here on i2c gpio I never see timetout as udelay so I don't see
> > > the mandatory to force the name in the binding
> > > 
> > > futhermore it's maybe linux specific
> > 
> > Stop grabbing at straws.  There's nothing linux specific about the units
> > of specification.
> > 
> > What is linux specific is specifying the _delay_ rather than specifying
> > the bus frequency.  So as soon as you're trying to justify not adding
> > the units because they may be linux specific, you've already lost that
> > argument by using a delay rather than a bus frequency.  You can't have
> > it both ways.
> > 
> > Moreover, mixing microseconds and milliseconds in the properties for a
> > device is absolutely insane.
> > 
> > So, which ever way, your patch as it currently stands is wrong and broken.
>  no what I said is the binding timeout is maybe linux specific for i2c gpio

I do not argue about that here we do not even disucss about the bus frequency
but the specific bining to the i2c algo bit for it's internal timeout

the timeout is used to do not end in an infinite loop while ready the scl on
slow device

that's why I said it's maybe linux specific

Best Regards,
J.