Re: Re: [PATCH v4 2/3] regulator MAX8998/LP3974: Support DVS-GPIO.

From: MyungJoo Ham
Date: Tue Jan 04 2011 - 19:54:31 EST


On Tue, Jan 04, 2011 at 22:44PM +0900, Mark Brown wrote:
> On Tue, Jan 04, 2011 at 05:16:56PM +0900, MyungJoo Ham wrote:
> > On Tue, Jan 4, 2011 at 4:49 PM, Lukasz Majewski wrote:
>
> > > Is it desirable to define all four for BUCK1 and two for BUCK2 DVS
> > > voltages in platform code?
>
> > In case a system with 4 buck1 preset voltages and 2 buck2 preset
> > voltages, it is desirable. :)
>
> I suspect Lukasz's question is more why this would be useful; I can
> imagine that the main reason would be performance and in any case I
> don't see it hurting to have the option.
>

Yes, it is supposed to be faster to set GPIO pins rather than sending values thru I2C busses. And some boards require all the four BUCK1 voltages and two BUCK2 voltages; e.g., S5PC110-Universal.

MyungJoo Ham (함명주)
Mobile Software Platform Lab,
Digital Media and Communications (DMC) Business
Samsung Electronics
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