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 B1000EB64DC for ; Mon, 3 Jul 2023 09:50:59 +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=q+Fvir8HGL9dHSz3VWmoHUka88GSAVlibzFZMUsW31I=; b=EvRmB5cyh0pwGh4O4CEkuSrvMV 6AYwQigiZVgKktLkf6KEH7VjOQr4x+580iRy0yI6j8X07JDQGqVv3GKqQrot6EcDIEJlfXDc4m7Wn rBhM+AFnhXs7TJi31EnH9TCBQ3+jrzmgnncPVxoT/rfkbrY9NlfUt3nSmAY+2+4vnBU0MiwZZIicw 4TQiK14jzofBbwTgXZTudzhvUp2NHINxzhrepKGqz3MKd3x3W3AUojmwttVO/LmwbD2WukrmK8njE A/GJbdDt+zqfqFAnLEmwTFigXPBrZoDZgO4tzjvuxtLKj5uvPDDS9XR5+NCryIM2FnQ3VSrhOLKdC ntVxHYpQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qGGCZ-00A15n-0K; Mon, 03 Jul 2023 09:50:35 +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 1qGGCW-00A13Q-2o for linux-arm-kernel@lists.infradead.org; Mon, 03 Jul 2023 09:50:34 +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 DE29B60E73; Mon, 3 Jul 2023 09:50:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF4A4C433C7; Mon, 3 Jul 2023 09:50:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1688377831; bh=LyukCnfIshSTbAwDJYNp6dcmjM1EfDP7RZS9ZHZjba4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Phu15QnH/sD22ugNy9M24vhr8GopWe4IIkSHl900X+cefSZa7cs5exWNiZbmSshgj 98Pq8zd2VvKaRxfPXHzXW0VDh54u1tc8N1Qr6ZckDAAdaRUdDDkTPtbn2+8FR1V9jN CpTiTgw/8axiXSeouIvV52Okhehg+em9wZmgXfZA73QKKLVtU117fwK6w4OK/EZ6Pj Ghw7NBpI9Xf+EzR7Wf+If0mtfsFhKcwkAUsTaDylKV1cjrMwB4HSC3PFQ+g4YVKCeO mZPR9sdLkTEg3zHtBk4ie1NA00jbi1DjBnhFzOyaxwrgnrBlB6q/ztLQgkPrLs39df Ldmb+TDo8Bh6w== Date: Mon, 3 Jul 2023 11:50:26 +0200 From: Wolfram Sang To: Sean Nyekjaer Cc: Pierre-Yves MORDRET , Alain Volmat , Maxime Coquelin , Alexandre Torgue , linux-i2c@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] i2c: stm32f7: Add atomic_xfer method to driver Message-ID: Mail-Followup-To: Wolfram Sang , Sean Nyekjaer , Pierre-Yves MORDRET , Alain Volmat , Maxime Coquelin , Alexandre Torgue , linux-i2c@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20230509132159.4160984-1-sean@geanix.com> <9BEDFE6D-AE5E-46F1-A1BF-A19C6F5130F6@geanix.com> MIME-Version: 1.0 In-Reply-To: <9BEDFE6D-AE5E-46F1-A1BF-A19C6F5130F6@geanix.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230703_025032_951850_EE54D95E X-CRM114-Status: GOOD ( 11.47 ) 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="===============3266344020718773506==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============3266344020718773506== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="WPJgYBpM8zD5lQRQ" Content-Disposition: inline --WPJgYBpM8zD5lQRQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > > Will DMA actually run in atomic mode? > Atomic is mainly(only) used for writing a single register in the PMIC > for the stpmic. And this most probably during shutdown... > Guess that will not trigger any DMA use. ... so I'd be very surprised if DMA is operational that late. I think we can rule that out independent of I2C messages to be trasnferred. --WPJgYBpM8zD5lQRQ Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmSimeIACgkQFA3kzBSg KbaU9g//Y1yfLkUK08Go/WdUa65GRV80RBI3gwDyPqLJYNsFbsmajpNqt/4XihqZ RTLxT+tWXSUw4DnFtovhuaucFZcEdtirZLplsCrioc0cNDP5RgYibMuOxsuOig2T M/BJK3b4iqIZJjiT+Lcs7RyPmvRetYTpyu8w17YPt5pPVeXIbDlcC1AStvCK0ghj 0ulGyX3VjRIgo++Dvcw2/08G5WL6MEB6sm9bvveaT1AX6eDBhfgPPB3l/d/+lBki Dd+8le1SnuEVfCN0TxLIZE9m9ZZLYTSH1BcBSCJT6SYPBoM7q26OVdAAAoP4uQ9S M6W3G6zEbHuZ0rTPRt70d2hBqAN40qmPmGZucvxIGoOxMS2rIJ6HRVvbgc3nrK4+ CkQ5PqYb2iIRaEIHposc6ggSgyC15w1pt7lczXZTCakTlgOCRehPMBnipec1n85C IgzRW2Si1yHZMdt5Oe8zvsvfrLsa/vx3xBzHvPh5Ai7IoCEBIpb14B11lcRDSmVT pWdFwgYvCy1t6sltEo1k0WaVVKZpmP/AYWGzQzo5QLyg2q1XnTCQ09pJNlkguPsa lJWc89HAKgOrmnm/r+eHbZQUo3N9KKkRv4FbhMOvUOQK0Vij2R5UX3PLpM6NVPms zV9LzkqESaPfI7W3j311Gv5hhvyUkGKnh5UeVPgv2OMC6J0Sy/Q= =qlPi -----END PGP SIGNATURE----- --WPJgYBpM8zD5lQRQ-- --===============3266344020718773506== 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 --===============3266344020718773506==--