From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6517C48BE5 for ; Wed, 23 Jun 2021 16:19:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9003760FE3 for ; Wed, 23 Jun 2021 16:19:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229915AbhFWQVS (ORCPT ); Wed, 23 Jun 2021 12:21:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:53966 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229726AbhFWQVQ (ORCPT ); Wed, 23 Jun 2021 12:21:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E9DC560FEE; Wed, 23 Jun 2021 16:18:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624465138; bh=nFxDX3ob+5lrr19ZRCiRLVmW1vX1e+NTnnN+gVbSdx8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=h7IWxKWOYuMGPnptAXVpdupWM233lGFswGdu03Vw2NdlsTi+IM17AoN46iYQZzozU ZWrpXu/oN685eSERGJzz85apt8LDgtA+YCbc/4YX5YLDDyje8R7jWdn3P6nplpAxOx uhPbBFObjU/M9K0O82sO3Ea/mYp+ECJdceAixCVfDKyl9fdwOIHvkGra/L3Mwjmyv7 9VjW2rcaF1nMpkR4FHTpVYNipv9SxH1q4o+w0t3PFKBenI6HBPHcBsDxsp4Ahh2wb/ Z+9gEMy1jXbg/Ke0cD/Mt9UK2yZBqQz6PcNIOJTlhGWEIC6r7gMWmF/r3SvgCbNXCK R/i0bTstCaing== Date: Wed, 23 Jun 2021 18:18:51 +0200 From: Wolfram Sang To: Raviteja Narayanam Cc: linux-i2c@vger.kernel.org, michal.simek@xilinx.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, git@xilinx.com Subject: Re: [PATCH] i2c: cadence: Clear HOLD bit before xfer_size register rolls over Message-ID: Mail-Followup-To: Wolfram Sang , Raviteja Narayanam , linux-i2c@vger.kernel.org, michal.simek@xilinx.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, git@xilinx.com References: <1606203965-31595-1-git-send-email-raviteja.narayanam@xilinx.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="OyBLtaJDLVkSju19" Content-Disposition: inline In-Reply-To: <1606203965-31595-1-git-send-email-raviteja.narayanam@xilinx.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --OyBLtaJDLVkSju19 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Nov 24, 2020 at 01:16:05PM +0530, Raviteja Narayanam wrote: > On Xilinx zynq SOC if the delay between address register write and > control register write in cdns_mrecv function is more, the xfer size > register rolls over and controller is stuck. This is an IP bug and > is resolved in later versions of IP. >=20 > To avoid this scenario, disable the interrupts on the current processor > core between the two register writes and enable them later. This can > help achieve the timing constraint. >=20 > Signed-off-by: Raviteja Narayanam Applied to for-next, thanks! --OyBLtaJDLVkSju19 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmDTXuYACgkQFA3kzBSg KbYIdg//exVtEUi0D2HX1w/0woHDZRYQ/uFHs4XoH8Ptbj2eWqUTHEKz+9tepW91 vtkbu2vGzNeP8m4aEVB1zg9ncCn0aj+EYJGb68JvLFGGgoHf2R7i1ko2PoAV4d47 q3ZNU1F54QRvUScOc5soabUQBVJ0NFRQJJ841ZAEqL0ODHmkrZYa4ki8EvV6zPEH FI1g2ccETNrBGoS3no8u9ecAMV5RFEP3zYHDjnpyLyPSODnkB/eH8fhjCMmvyE39 3/PwLQGpT0qlj0yDk1T38ohUUucDD6V9YbrHvKw9w0F3Pfq21w8fGSKL/sIRkhwo spbt7lCT9ao1rLgd/8NXVqRl69tLv+fqJI0vl0YvJyOVTyddWRTHZDw8D9qDiS5Z 8iGbgWU3UAgfTFkm9l2IyZZikzBCWuTwYWMfxwP9ZHrlmR/28V3jAjL9/AOXm/sd x5d0qMKsJHta9yKqnmERGiTFSRTKrBk4RhEhMVD89a131VyMfoHnNZQOnHLhjAgh wDnvDz5TQthhCQzeLKWfUPTMMsNojfg/qsbXWrOoUySqVYD8nlHsuvNUopKno6MA Y5SdLK5NetL3qvED/0MmchTZbNgWsnvhbTjpxbnuaLfvtGlu6G2w2gfQ3VRuPflc jptjt3QNgph9TwVra44sl04QHp3+1/kXO7UgfWiARuKFoAJHcXw= =1t/y -----END PGP SIGNATURE----- --OyBLtaJDLVkSju19-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3C3FC4743C for ; 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h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=h7IWxKWOYuMGPnptAXVpdupWM233lGFswGdu03Vw2NdlsTi+IM17AoN46iYQZzozU ZWrpXu/oN685eSERGJzz85apt8LDgtA+YCbc/4YX5YLDDyje8R7jWdn3P6nplpAxOx uhPbBFObjU/M9K0O82sO3Ea/mYp+ECJdceAixCVfDKyl9fdwOIHvkGra/L3Mwjmyv7 9VjW2rcaF1nMpkR4FHTpVYNipv9SxH1q4o+w0t3PFKBenI6HBPHcBsDxsp4Ahh2wb/ Z+9gEMy1jXbg/Ke0cD/Mt9UK2yZBqQz6PcNIOJTlhGWEIC6r7gMWmF/r3SvgCbNXCK R/i0bTstCaing== Date: Wed, 23 Jun 2021 18:18:51 +0200 From: Wolfram Sang To: Raviteja Narayanam Cc: linux-i2c@vger.kernel.org, michal.simek@xilinx.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, git@xilinx.com Subject: Re: [PATCH] i2c: cadence: Clear HOLD bit before xfer_size register rolls over Message-ID: Mail-Followup-To: Wolfram Sang , Raviteja Narayanam , linux-i2c@vger.kernel.org, michal.simek@xilinx.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, git@xilinx.com References: <1606203965-31595-1-git-send-email-raviteja.narayanam@xilinx.com> MIME-Version: 1.0 In-Reply-To: <1606203965-31595-1-git-send-email-raviteja.narayanam@xilinx.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210623_091859_335953_CAC3D3BD X-CRM114-Status: GOOD ( 11.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7454433517352778082==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============7454433517352778082== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="OyBLtaJDLVkSju19" Content-Disposition: inline --OyBLtaJDLVkSju19 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Nov 24, 2020 at 01:16:05PM +0530, Raviteja Narayanam wrote: > On Xilinx zynq SOC if the delay between address register write and > control register write in cdns_mrecv function is more, the xfer size > register rolls over and controller is stuck. This is an IP bug and > is resolved in later versions of IP. >=20 > To avoid this scenario, disable the interrupts on the current processor > core between the two register writes and enable them later. This can > help achieve the timing constraint. >=20 > Signed-off-by: Raviteja Narayanam Applied to for-next, thanks! --OyBLtaJDLVkSju19 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmDTXuYACgkQFA3kzBSg KbYIdg//exVtEUi0D2HX1w/0woHDZRYQ/uFHs4XoH8Ptbj2eWqUTHEKz+9tepW91 vtkbu2vGzNeP8m4aEVB1zg9ncCn0aj+EYJGb68JvLFGGgoHf2R7i1ko2PoAV4d47 q3ZNU1F54QRvUScOc5soabUQBVJ0NFRQJJ841ZAEqL0ODHmkrZYa4ki8EvV6zPEH FI1g2ccETNrBGoS3no8u9ecAMV5RFEP3zYHDjnpyLyPSODnkB/eH8fhjCMmvyE39 3/PwLQGpT0qlj0yDk1T38ohUUucDD6V9YbrHvKw9w0F3Pfq21w8fGSKL/sIRkhwo spbt7lCT9ao1rLgd/8NXVqRl69tLv+fqJI0vl0YvJyOVTyddWRTHZDw8D9qDiS5Z 8iGbgWU3UAgfTFkm9l2IyZZikzBCWuTwYWMfxwP9ZHrlmR/28V3jAjL9/AOXm/sd x5d0qMKsJHta9yKqnmERGiTFSRTKrBk4RhEhMVD89a131VyMfoHnNZQOnHLhjAgh wDnvDz5TQthhCQzeLKWfUPTMMsNojfg/qsbXWrOoUySqVYD8nlHsuvNUopKno6MA Y5SdLK5NetL3qvED/0MmchTZbNgWsnvhbTjpxbnuaLfvtGlu6G2w2gfQ3VRuPflc jptjt3QNgph9TwVra44sl04QHp3+1/kXO7UgfWiARuKFoAJHcXw= =1t/y -----END PGP SIGNATURE----- --OyBLtaJDLVkSju19-- --===============7454433517352778082== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============7454433517352778082==--