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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5621CC001B0 for ; Mon, 14 Aug 2023 15:02:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=kbO1FkZyceMkPm9loyWOKYe6Zw/Xp6Skqk2ISIoGlzI=; b=XhESSm5kh+ZC7NfRTy5ghWb52g iYpyNIPgBQ1DKQff16f5G0TZ/KlSXVjYq5BgPV+G2lcjK1jo8bYuP7KgH80pzvfHOKMHu7Zm2U4Sx 1IGqSiu9a5iEL94bDjwP6XQ/gJM/w5KEhbpNxqQsJxXjEGRr5+0aqFsUfptPwv7HkF9vuSHA5tCZS VF1tU1Q46K/qd3FRWv1lGb/Qpy9LAAleTWlvRzOVKkY8GXq0/eCOtxZcxOhigRwgwglJzu6OxWWLI i5GXCreqAYYTJIzd257tEAeM2MsOG0TzxhG2vwA/0EuJmVV28jAKJziTGifEuN8Cr1X4E9dh9rzT2 tTBla4Hw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qVZ5D-00HPME-05; Mon, 14 Aug 2023 15:02:15 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qVZ5B-00HPLo-0s for linux-arm-kernel@lists.infradead.org; Mon, 14 Aug 2023 15:02:14 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C386162066; Mon, 14 Aug 2023 15:02:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1C5BC433C8; Mon, 14 Aug 2023 15:02:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692025332; bh=CLst8JcIxRWJRs96SWu43o7JLfLImPUU1vROlmY+7V0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gtbYFW/YIqdj8Sia7jg+XIhP2UJW05KXxzz/dVFPvj6/61CI51fZruZlNUaHhd2Q4 qhvbaMxNW1/SaEBpebU7emYByq3yXPzvG6zD7UYLAIir9TBsWlSVtGUH3H7p3HcF4k U8MXKe1whDqs5oAvt6IS4njkMm4RoOhZrUvYYMFS90TevvNRmeRSqasg4znPQECkVh C/CbK5oolhiYUOMbWtpC5+pGytQS7zZjXSheMMKpjYTOEdmUJCwfWlujPCfrvqjTlo RiwkLcjvwJhe7NiyckE8fJsbYJbvBFx+wYHShlkr0ItRtwRs7fShLwHYTs7Fm/NwfP tWJeXuQCwGFjg== Date: Mon, 14 Aug 2023 17:02:09 +0200 From: Wolfram Sang To: Andi Shyti Cc: aisheng.dong@nxp.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, carlos.song@nxp.com, xiaoning.wang@nxp.com, haibo.chen@nxp.com, linux-imx@nxp.com, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4] i2c: imx-lpi2c: directly return ISR when detect a NACK Message-ID: Mail-Followup-To: Wolfram Sang , Andi Shyti , aisheng.dong@nxp.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, carlos.song@nxp.com, xiaoning.wang@nxp.com, haibo.chen@nxp.com, linux-imx@nxp.com, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20230727030347.3552992-1-carlos.song@nxp.com> <169100562766.1919254.12222013232053766298.b4-ty@kernel.org> MIME-Version: 1.0 In-Reply-To: <169100562766.1919254.12222013232053766298.b4-ty@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230814_080213_373494_4055ACA3 X-CRM114-Status: GOOD ( 14.49 ) 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="===============8686174238407740871==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============8686174238407740871== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="w3K+5rbsIPadrzlO" Content-Disposition: inline --w3K+5rbsIPadrzlO Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Aug 02, 2023 at 10:10:31PM +0200, Andi Shyti wrote: > Hi >=20 > On Thu, 27 Jul 2023 11:03:47 +0800, carlos.song@nxp.com wrote: > > A NACK flag in ISR means i2c bus error. In such condition, > > there is no need to do read/write operation. > >=20 > > In this patch, i2c will check MSR_NDF, MSR_RDF and MSR_TDF > > flag in turn, it's making mutually exclusive NACK/read/write. > > So when a NACK is received(MSR_NDF), i2c will return ISR > > directly and then stop i2c transfer. > >=20 > > [...] >=20 > Applied to i2c/andi-for-next on Applied to for-next (via Andi's tree), thanks! --w3K+5rbsIPadrzlO Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmTaQewACgkQFA3kzBSg KbbjoBAArY/BhYhzQhmZR3cld8jSC7zTM/UcLi9YgnSUMdJ4rrLV9Lzf5dGk58WF tfdUGhPDDY7CgYwVurUENvqtU5g5O+b4LQJ9Fyj2F/10U5lAFv7Bn6A5W6w98yFH 28EgSPb5YEuKuDwhIsRmuII5AZf/A6mb7ivrT7e7gS1dn5Ur7GkHhsd9f4megZeq WOKZ4Psva/JW0SZW3LlyayV/ZJQsZcapt/puXIPt2IupefKoUxduu4Dbw3sVhf1U zA5p4Kw+q0NBqXN7P9D3ZlyWGmYsNURrp4I2EEWkFnQj9yZExVugaEx5TabK9C3q z/xBBE504UKgME5n5b7F7IT9wiFRjwwsjtLFlnIrk+h8MnqJ9H2GnVr0UW3Z7tnN vMixefzx211lTy9CGWz2zIe6ar4bohkH33u3EEufb0OjBo42s7PXNQ4AudHoCnCO TupY9SpVElJmpSocg4i2Q4xBbE/55Gw9q1uOe1dtBz0PP9n1SX+95iZdr/WiZ4zU 0ZuH2tdaoF+13ngwcih1s6McMwCb4/A6t/AkZcytpk/HzK14rLOAnOorFuaMjfFm JUnMigzyLzgiTCVqa0erVtI5/CHIOUkIPJJ74R/Li0upA8HnK23ePRk1F6aB+qRB p5JXeKlR1gxjwOAcUI4OAuFT9jWMaS906RzHXjpA/hoDv5YqdFs= =yuB9 -----END PGP SIGNATURE----- --w3K+5rbsIPadrzlO-- --===============8686174238407740871== 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 --===============8686174238407740871==--