Question about DC-DC frequency handling

Mark Brown broonie at kernel.org
Mon Apr 27 13:57:42 PDT 2015


On Mon, Apr 27, 2015 at 10:44:56PM +0200, Stefan Wahren wrote:
> > Michael Turquette <mturquette at linaro.org> hat am 26. April 2015 um 21:07
> > Quoting Stefan Wahren (2015-04-26 07:31:30)

> > I'll hazard a guess that they do not care. DC-DC switching frequency is
> > an important aspect of power supply design, but switching frequency of a
> > power supply is not controlled by the clock framework in any example
> > that I am aware of.

> yes the consumers don't care. My intension for changing the switching frequency
> is
> to avoid interferences on HF band.

You may also find that the switching frequency is dictated by the choice
of passives on the board - you may find there's restrictions there that
mean the user can't freely choose without running into performance
problems.
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