Re: regulator: Policy for setting current limits

From: Heiko Stübner
Date: Mon Aug 06 2012 - 19:19:32 EST


Am Montag, 6. August 2012, 13:56:33 schrieb Mark Brown:
> On Mon, Aug 06, 2012 at 01:27:56AM +0200, Heiko Stübner wrote:
> > 500). Therefore if 500mA are the upper limit but the regulator also
> > supports lower values, these lower values always get selected (100mA in
> > my case). In contrast pda_power sets the target current as both lower
> > and upper limit.
>
> This isn't good, it means that the regulator has to be able to deliver
> exactly the limit requested.
>
> > (a) let the gpio-regulator select the max current (in contrast to the
> > minimum voltage)
> > (b) change gpio-vbus to also use the target current as min and max value
> > (c) something else
>
> Regulators should be tending to the maximum in the available range and
> consumers should specify the widest range possible so both a and b.

Is this true for all regulators (i.e. voltage and currency regulators)?

Because 4dbd8f63f07a (regulator: gpio-regulator: Set the smallest
voltage/current in the specified range) implemented the exact oposite.

Thanks
Heiko
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/