[PATCH v6 1/4] Runtime Interpreted Power Sequences

[Tomi Valkeinen]

On Thu, 2012-09-13 at 09:00 +0200, Sascha Hauer wrote:
> On Thu, Sep 13, 2012 at 09:54:09AM +0300, Tomi Valkeinen wrote:
> > On Thu, 2012-09-13 at 15:36 +0900, Alex Courbot wrote:
> > > On Thursday 13 September 2012 14:22:57 Tomi Valkeinen wrote:
> > >  
> > > > However, I fear these board specific things may be quite a bit anything,
> > > > so it may well be pwm, gpios and regulators are not enough for them. For
> > > > example, there could be an FPGA on the board which requires some
> > > > configuration to accomplish the task at hand. It could be rather
> > > > difficult to handle it with a generic power sequence.
> > > 
> > > Right. Note that this framework is supposed to be extended - I would like to 
> > > at least add regulator voltage setting, and maybe even support for clocks and 
> > > pinmux (but that might be out of place).
> > 
> > Yes, that's one concern of mine... I already can imagine someone
> > suggesting adding conditionals to the power sequence data. Perhaps also
> > direct memory read/writes so you can twiddle registers directly. And so
> > on. Where's the limit what it should contain? Can we soon write full
> > drivers with the DT data? =)
> 
> I have this concern aswell, that's why I'm sceptical about this patch
> set. But what are the alternatives? Adding power code to the drivers and
> thus adding board specific code to them is backwards.

As was pointed out in earlier posts in this thread, these are almost
always device specific, not board specific.

Do you have examples of board specific power sequences or such?

 Tomi

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: This is a digitally signed message part
URL: <http://lists.ozlabs.org/pipermail/devicetree-discuss/attachments/20120913/28ce6ce6/attachment.sig>