lkml.org 
[lkml]   [2009]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/1] Add all TWL4030 regulators to Regulator framework
On Thu, Nov 19, 2009 at 08:04:08AM +0100, Keski-Saari Juha.1 (EXT-Teleca/Helsinki) wrote:
> ext Mark Brown wrote:
> > On Wed, Nov 18, 2009 at 04:36:09PM +0200, Eduardo Valentin wrote:
> >
> >> But maybe these VINT* should be set as always_on in twl4030-regulator driver?
> >
> > Can they support any external load at all? If not then it would make
> > sense for the chip driver to at least provide a default set of
> > constraints for them rather than forcing all the machine drivers to do
> > it manually.
>
> From the TRM it appears that the max current output values are as follows
>
> VINTANA1 - 30mA
> VINTANA2 - 250mA
> VINTDIG - 100mA
>
> Theoretically they may be able to support external load depending on your machine configuration but still I think providing constraints for them in
> the chip driver could be a good idea since the "always-on" limitation is imposed by the chip and not the machine. Without these three supplies the TWL
> does not function properly, if at all. Also worth noting is that the current implementation of RegulatorFW doesn't appear to be able to turn these
> supplies off (comparing TWL register content with framework status).

VINTANA2 can be turned off if MADC, audio and USB are not used.

Cheers,

Peter.
--
goa is a state of mind


\
 
 \ /
  Last update: 2009-11-19 10:27    [W:0.097 / U:0.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site