From mboxrd@z Thu Jan 1 00:00:00 1970 From: pali.rohar@gmail.com (Pali =?utf-8?q?Roh=C3=A1r?=) Date: Sun, 5 Apr 2015 15:52:10 +0200 Subject: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages) In-Reply-To: <20150405134528.GD9186@earth> References: <1425236828-28349-1-git-send-email-jarkko.nikula@bitmer.com> <201504051526.14575@pali> <20150405134528.GD9186@earth> Message-ID: <201504051552.10522@pali> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sunday 05 April 2015 15:45:28 Sebastian Reichel wrote: > Hi, > > On Sun, Apr 05, 2015 at 03:26:14PM +0200, Pali Roh?r wrote: > > > > > 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=c6f90e1418a8 > > > > 4fe5 fa463b38403bd1845cb6a59c > > > > > > 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). > > > > You must not expect that bootloader set something. Nokia > > N900 has closed and signed bootloader which cannot be > > easily replaced and or fixed. > > > > For N900 there is U-Boot but it does not support lot of > > things (load kernel via usb or serial) so for developers it > > is better to use original Nokia bootloader. > > Yes, I'm aware of that. I think having the IBE bit set in > u-boot has advantages nevertheless. I think the kernel can't > enable the bit sufficiently early if its compiled in > thumb-mode itself (CONFIG_THUMB2_KERNEL). > > So I suggest to enable the IBE bit in the kernel (that part is > already done) *and* in u-boot. > > -- Sebastian Yes. Code for both (U-Boot and linux kernel) exists and are already included. In linux kernel code is since 3.14-rc6 and in U-Boot code is there since beginning of Nokia N900 support (2013.04) directly in board code. I believe that you guys do not remove or break that code :-) Nokia N900 needs slightly different code for setting IBE bit as other omap3 boards. For info is in commit message of commit 4748a7240284b0f68bd47a66365c2cd561939830. -- Pali Roh?r pali.rohar at gmail.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: This is a digitally signed message part. URL: