Messages in this thread | | | Date | Thu, 19 Nov 2009 11:24:12 +0200 | From | "Peter 'p2' De Schrijver" <> | Subject | Re: [PATCH 1/1] Add all TWL4030 regulators to Regulator framework |
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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
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