Re: [PATCH] clk: tegra: PLLE spread spectrum control

From: Peter De Schrijver
Date: Thu Oct 03 2013 - 06:52:37 EST


On Tue, Oct 01, 2013 at 09:56:26PM +0200, Stephen Warren wrote:
> On 09/26/2013 09:34 AM, Peter De Schrijver wrote:
> > Add spread spectrum control for PLLE in Tegra114.
>
> It would be useful to have some description of the end-user-visible
> benefit of this change; why is it useful?

spread spectrum clocking is a technique to reduce EMI caused by the clock
signal by modulating the frequency with a low frequency signal. This should
reduce interference with eg. Wifi or cellular modems on the same board.

Cheers,

Peter.
--
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/