From mboxrd@z Thu Jan 1 00:00:00 1970 From: robert.jarzmik@free.fr (Robert Jarzmik) Date: Sun, 27 Mar 2011 18:56:58 +0200 Subject: [PATCH RFC] ARM: PXA27x: CPUFREQ: Don't use fastbus mode In-Reply-To: <1301240089.10831.2.camel@konomi> (Marek Vasut's message of "Sun\, 27 Mar 2011 17\:34\:49 +0200") References: <1301169103-23968-1-git-send-email-anarsoul@gmail.com> <201103271745.15216.anarsoul@gmail.com> <1301237445.10630.2.camel@konomi> <201103271756.19262.anarsoul@gmail.com> <1301240089.10831.2.camel@konomi> Message-ID: <87r59sbixx.fsf@free.fr> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Marek Vasut writes: >> On Sunday 27 March 2011 17:50:45 Marek Vasut wrote: >> > > On Sunday 27 March 2011 13:09:20 Igor Grinberg wrote: >> > > > On 03/27/11 11:48, Vasily Khoruzhick wrote: >> > > > > On Sunday 27 March 2011 12:09:21 Igor Grinberg wrote: >> > > > > > Possibly, but Z2 is not the only one using PXA27x. >> > > > > > And of course you lose performance, unless you don't care, >> > > > > > because if it does not work at all, you don't care about >> > > > > > performance, but again it is wrong to force all PXA27x based >> > > > > > boards to this. >> > > > > >> > > > > Ok, that's why I've sent this patch with RFC in subject - Z2 is >> > > > > the only PXA270-based device I own :) >> > > > > >> > > > > > cm-x270 and em-x270 work well with fast bus bit set with >> > > > > > userspace governor and with the above frequencies. >> > > > > >> > > > > What about ondemand and conservative governors? These 2 work well on the mioa701 platform, under the constraint that the minimal frequency is set to 208 instead of 104. I would think as Marek that it's a under-voltage issue, unless it's the 104Mhz transition issue which lasts for as long as I own my platform (and which might be mioa701 specific AFAIK). -- Robert