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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