From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Tue, 28 Jul 2015 14:55:45 +0200 Subject: [linux-sunxi] [RFC] ARM: dts: sunxi: Add regulators and board-specific operating points for LeMaker BananaPi In-Reply-To: <20150728090216.892076C80D94@dd34104.kasserver.com> References: <1437960486-2809-1-git-send-email-public_timo.s@silentcreek.de> <55B5E6DB.8020009@redhat.com> <20150727123653.36C046C8007E@dd34104.kasserver.com> <55B62A1B.6030601@redhat.com> <20150728090216.892076C80D94@dd34104.kasserver.com> Message-ID: <20150728125545.GC2564@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jul 28, 2015 at 11:02:16AM +0200, Timo Sigurdsson wrote: > Hi, > > Chen-Yu Tsai schrieb am 27.07.2015 15:14: > >> ChenYu (in the CC), since you did most of the original work here, do > >> you know why we have an op at 0.9 volt, but none of our boards allow the > >> voltage to go that low in the regulator settings ? > > > > I'm on vacation now, so apologies for the bad formatting. > > > > The OPPs are from a common subset > > of the settings from the fex files available > > at the time. Some fex files actually set > > min and max voltage thus eliminating > > the highest and lowest OPPs. > > > > At least that is how Maxime and I > > interpreted them. > > IMHO for a common maximum opp that's a good approach. But for the lowest > frequency setting, it would seem more logical to me, to raise the voltage > to a point where all boards will run fine with them, unless those boards > cannot handle the frequency regardless of the higher voltage. Agreed. 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: