Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755492AbbG1JCY (ORCPT ); Tue, 28 Jul 2015 05:02:24 -0400 Received: from dd34104.kasserver.com ([85.13.151.79]:39365 "EHLO dd34104.kasserver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754843AbbG1JCS (ORCPT ); Tue, 28 Jul 2015 05:02:18 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-SenderIP: 153.96.32.62 User-Agent: ALL-INKL Webmail 2.11 In-Reply-To: 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> Subject: Re: [linux-sunxi] [RFC] ARM: dts: sunxi: Add regulators and board-specific operating points for LeMaker BananaPi From: "Timo Sigurdsson" To: hdegoede@redhat.com, wens@csie.org Cc: galak@codeaurora.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org, ijc+devicetree@hellion.org.uk, linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, pawel.moll@arm.com, maxime.ripard@free-electrons.com, linux@arm.linux.org.uk, robh+dt@kernel.org Message-Id: <20150728090216.892076C80D94@dd34104.kasserver.com> Date: Tue, 28 Jul 2015 11:02:16 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1115 Lines: 31 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. Regards, Timo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/