From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Mon, 3 Aug 2015 11:28:39 +0200 Subject: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply In-Reply-To: References: <1438543386-7253-1-git-send-email-public_timo.s@silentcreek.de> Message-ID: <20150803092839.GB2564@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Aug 03, 2015 at 02:22:13PM +1000, Julian Calaby wrote: > >> Is the code that uses this smart enough to sensibly switch between two > >> operating points with the same frequency and different voltages? If > >> so, maybe just add a 144MHz @ 1.0v operating point? > > > > You could try. Though I really don't see much to gain here. > > From what I recall, lower frequency = less power usage, though my > experience is from x86 laptops, not ARM SoCs and I'm sure I'm missing > a lot of details. This is the sort of thing that requires thorough > testing on a dev board. Not on *a* dev board. On virtually all the A20 SoCs ever produced. If you have a setting that works better for *your* SoC, fine, patch your DT, but that's not going to be a default if it's outside of the SoC operating range. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: