From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Tue, 6 Oct 2015 08:37:11 -0700 Subject: All OMAP platforms: MMC is broken In-Reply-To: <20151006150009.GF21626@n2100.arm.linux.org.uk> References: <20151001100326.GV21513@n2100.arm.linux.org.uk> <20151005112304.GZ23801@atomide.com> <20151005143532.GA23801@atomide.com> <20151005145127.GB23801@atomide.com> <20151005171155.GF23801@atomide.com> <20151005183813.GD21626@n2100.arm.linux.org.uk> <20151006090015.GE21626@n2100.arm.linux.org.uk> <20151006094425.GM23801@atomide.com> <20151006150009.GF21626@n2100.arm.linux.org.uk> Message-ID: <20151006153710.GS23801@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Russell King - ARM Linux [151006 08:04]: > On Tue, Oct 06, 2015 at 02:44:25AM -0700, Tony Lindgren wrote: > > > > Hmm DT-based boot finds the MMC card for LDP, dmesg below from DT boot [1]. > > Looks like you're on on -rc4 and not -rc3. My guess is that MMC is not > > working for you with DT-based booting because you don't seem to have > > CONFIG_REGULATOR_PBIAS in your seed config for. Care to try enabling that > > for both your omap3 and omap4 seed config files? > > This is precisely the kind of crap I'm objecting to. New kernel versions > come along, and things break because people add extra Kconfig symbols that > previous versions did not rely upon - and there's no communication of > what's required for new kernel versions. > > This stuff needs documenting, so that people are aware what changes they > need to make - please put something in Documentation/arm/OMAP which > tracks what new additions are required to the Kconfig to keep things > working. Good idea, how about something like the following? AFAIK that's the only .config option needed as MFD_SYSCON is selected by Kconfig already. Regrds, Tony 8< ---------- From: Tony Lindgren Date: Tue, 6 Oct 2015 08:33:16 -0700 Subject: [PATCH] Documentation: ARM: List new omap MMC requirements Earlier the PBIAS regulator was optional, not so with recent omap_hsmmc changes. To make things easier for people with custom .config files, let's add minimal documentation for it as suggested by Russell King . Signed-off-by: Tony Lindgren --- /dev/null +++ b/Documentation/arm/OMAP/README @@ -0,0 +1,7 @@ +This file contains documentation for running mainline +kernel on omaps. + +KERNEL NEW DEPENDENCIES +v4.3+ Update is needed for custom .config files to make sure + CONFIG_REGULATOR_PBIAS is enabled for MMC1 to work + properly.