Hi,

Michael Turquette <mturquette@linaro.org> hat am 26. April 2015 um 21:07 geschrieben:

Quoting Stefan Wahren (2015-04-26 07:31:30)

...

Hi,

i'm current working on a regulator driver which should be able to change DC-DC clock frequency.

Now here is my question. What is the prefered way to implement the clock handling?

Fun question. I have a question for you: who are the consumers of this DC-DC? Do the downstream, consuming devices care about "clock rate" of your regulator?

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.

...

Option A):

The regulator driver handles all internally (select clock source, set frequency).

Mark should weigh in on this, but I think option A is correct. Maybe something like regulator_set_mode could program your switching frequency?

A runtime configuration isn't necessary. In a earlier discussion we decided to use a devicetree property. Thanks Stefan