From mboxrd@z Thu Jan 1 00:00:00 1970 From: sre@kernel.org (Sebastian Reichel) Date: Sun, 5 Apr 2015 15:00:45 +0200 Subject: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages) In-Reply-To: References: <1425236828-28349-1-git-send-email-jarkko.nikula@bitmer.com> <55197A12.1050009@bitmer.com> <20150330164237.GJ10805@atomide.com> <55198BA4.5010207@bitmer.com> <20150330175051.GK10805@atomide.com> <20150331123233.GA15103@earth> <20150401194734.GT10805@atomide.com> <20150403163553.GA16247@earth> <20150403183942.GV10805@atomide.com> Message-ID: <20150405130045.GB9186@earth> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Apr 03, 2015 at 02:21:48PM -0500, Robert Nelson wrote: > >> And yes, for armhf userland one gets random oopses at least on the > >> Nokia N900. AFAIK this is not true for all ARMv7 processors > >> (especially non omaps), though. > >> > >> > http://www.spinics.net/lists/linux-omap/msg108511.html > >> > > >> > See also 5c86c5339c56 ("ARM: omap2plus_defconfig: Enable ARM erratum > >> > 430973 for omap3"). > >> > >> For me the random oopses occur without this config flag and are > >> fixed by it. The workaround is not very suitable for multi platform > >> kernels, though, since its enabled also for unaffected platforms. > >> > >> As far as I can see the CONFIG_ARM_ERRATA_430973 flag is checked > >> in proc-v7.S and in proc-v7-2level.S. I think the first file is > >> irrelevant, since it can be fixed later (see workaround in > >> nokia_n900_legacy_init in pdata-quirks.c). > > > > Yes so it seems, and the bootloaders should really set it. It's > > also disabled for multiplatform builds. > > These are now done in u-boot as of: v2015.04-rc4 > > http://git.denx.de/?p=u-boot.git;a=commit;h=c6f90e1418a84fe5fa463b38403bd1845cb6a59c Seems like "include/configs/nokia_rx51.h" has been forgotten. Note, that the kernel must still be able to enable the bit itself (in case NOLO is used without u-boot). -- Sebastian -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: