From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pali =?utf-8?q?Roh=C3=A1r?= Subject: Re: ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages) Date: Sun, 5 Apr 2015 15:52:10 +0200 Message-ID: <201504051552.10522@pali> References: <1425236828-28349-1-git-send-email-jarkko.nikula@bitmer.com> <201504051526.14575@pali> <20150405134528.GD9186@earth> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1434434.Sytk88sGA8"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wi0-f178.google.com ([209.85.212.178]:36513 "EHLO mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751389AbbDENwN (ORCPT ); Sun, 5 Apr 2015 09:52:13 -0400 Received: by wizk4 with SMTP id k4so10396636wiz.1 for ; Sun, 05 Apr 2015 06:52:12 -0700 (PDT) In-Reply-To: <20150405134528.GD9186@earth> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Sebastian Reichel Cc: Robert Nelson , Tony Lindgren , "linux-omap@vger.kernel.org" , Pavel Machek , "linux-arm-kernel@lists.infradead.org" --nextPart1434434.Sytk88sGA8 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Sunday 05 April 2015 15:45:28 Sebastian Reichel wrote: > Hi, >=20 > On Sun, Apr 05, 2015 at 03:26:14PM +0200, Pali Roh=C3=A1r wrote: > > > > > Yes so it seems, and the bootloaders should really set > > > > > it. It's also disabled for multiplatform builds. > > > >=20 > > > > These are now done in u-boot as of: v2015.04-rc4 > > > >=20 > > > > http://git.denx.de/?p=3Du-boot.git;a=3Dcommit;h=3Dc6f90e1418a8 > > > > 4fe5 fa463b38403bd1845cb6a59c > > >=20 > > > 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). > >=20 > > You must not expect that bootloader set something. Nokia > > N900 has closed and signed bootloader which cannot be > > easily replaced and or fixed. > >=20 > > 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. >=20 > 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). >=20 > So I suggest to enable the IBE bit in the kernel (that part is > already done) *and* in u-boot. >=20 > -- Sebastian Yes. Code for both (U-Boot and linux kernel) exists and are=20 already included. In linux kernel code is since 3.14-rc6 and in U-Boot code is=20 there since beginning of Nokia N900 support (2013.04) directly in=20 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=20 other omap3 boards. For info is in commit message of commit=20 4748a7240284b0f68bd47a66365c2cd561939830. =2D-=20 Pali Roh=C3=A1r pali.rohar@gmail.com --nextPart1434434.Sytk88sGA8 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEABECAAYFAlUhPgoACgkQi/DJPQPkQ1L8ZACeMdk+d2JuqdAggH5pLLheJfCu COEAoL74sBnmgn3JVilMkpYVhppCvpml =gy+i -----END PGP SIGNATURE----- --nextPart1434434.Sytk88sGA8--