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=-6.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS autolearn=no 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 B2F5DC43457 for ; Mon, 12 Oct 2020 09:07:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47B1420790 for ; Mon, 12 Oct 2020 09:07:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VKPM45KM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729142AbgJLJHy (ORCPT ); Mon, 12 Oct 2020 05:07:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726428AbgJLJHy (ORCPT ); Mon, 12 Oct 2020 05:07:54 -0400 Received: from mail-ej1-x641.google.com (mail-ej1-x641.google.com [IPv6:2a00:1450:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51F7CC0613CE; Mon, 12 Oct 2020 02:07:52 -0700 (PDT) Received: by mail-ej1-x641.google.com with SMTP id lw21so22168446ejb.6; Mon, 12 Oct 2020 02:07:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=WBP0ukfg4bFUZZ8QI0iTYDIdCmp1ksVWbobi3gjGmJA=; b=VKPM45KMaQStON5NAFbV9TPHSROxX4rvZ6xMY9f/mTEz8NZ08VJ6tKcUKtMOfa6Lh4 S2Ok6+JlD39XR2ItQCTPe466/QYF+m5frXD0kFEPo6wceZtP+bc8yIo0CKqfu3MMerpQ xZvrlDBUa0tHdHz1evHWWx6Nns6S3CSiG5NPQqYKqav5iPccWLtSOGUnPf3+R724hQ38 V4ZfGDyA42QzGGyCNI36tldOIS8Qs5RS9NqRvymVWhBe0aCFMgXyaUMba7up3Kca+V4H A9QTR1xpQ8I6WbNv8hZ1qbvk7QW6G01kxFRHMkJrWf8qZiE2cKq84Pv5SDoki89TDr9d 9ORA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=WBP0ukfg4bFUZZ8QI0iTYDIdCmp1ksVWbobi3gjGmJA=; b=Jqp+DhLXxENg56AScfGhIFFVBGyt1HVRkJmEO4cMv6xxAFJCOBDpsWI0DoSSofUERN FNmexHrOpGfVyGGgEgFar0O7dRWh87AtD2kz6Z7qH+tV2340+5gaqpm19KUpBrwql5eB O7mWi/Z43O2wIRDs9wISvBX9RZHckBWdgiq0D80zZxsHBIR9GixJjgtwEawaT0yjgE1N VXIqXzi4G+zEq22uyGYERzBya3TA95jWbEyAl8cZj06kgzcd0fk6ZuhkpSL4CmEBydI4 2c8TP9gnQD65S7M2WqWV0XTEhPEX+9cxG716y6/zC54H+Ugtt1p3JZjxBQgadEWEQ7Iy PMFQ== X-Gm-Message-State: AOAM530a38t/oeZtf/ahYs1zMXr6Y7Yc7DgxyAbp8Xi2R1IcXRrJ5CPA VCJu6zlI5x7rBBuV/9Vxr68= X-Google-Smtp-Source: ABdhPJzGtSWf6qZSdSdrnDLrLYkt+xop/WQnkOoCpLjW3n9eUhP+o6txr3NIKKXdR1SJKE/3AvmXXw== X-Received: by 2002:a17:906:c015:: with SMTP id e21mr26451902ejz.432.1602493670667; Mon, 12 Oct 2020 02:07:50 -0700 (PDT) Received: from ubuntu2004 ([188.24.159.61]) by smtp.gmail.com with ESMTPSA id d1sm5003346ejo.17.2020.10.12.02.07.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Oct 2020 02:07:50 -0700 (PDT) Date: Mon, 12 Oct 2020 12:07:53 +0300 From: Cristian Ciocaltea To: Manivannan Sadhasivam Cc: Andreas =?iso-8859-1?Q?F=E4rber?= , Wolfram Sang , Peter Rosin , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-actions@lists.infradead.org Subject: Re: [PATCH 2/3] i2c: owl: Add support for atomic transfers Message-ID: <20201012090753.GB73734@ubuntu2004> References: <1af37112fafd6cf069dfe864560f77996f57d80d.1602190168.git.cristian.ciocaltea@gmail.com> <20201011140920.GB4971@Mani-XPS-13-9360> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201011140920.GB4971@Mani-XPS-13-9360> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Oct 11, 2020 at 07:39:20PM +0530, Manivannan Sadhasivam wrote: > On Fri, Oct 09, 2020 at 12:44:40AM +0300, Cristian Ciocaltea wrote: > > Atomic transfers are required to properly power off a machine through > > an I2C controlled PMIC, such as the Actions Semi ATC260x series. > > > > System shutdown may happen with interrupts being disabled and, as a > > consequence, the kernel may hang if the driver does not support atomic > > transfers. > > > > This functionality is essentially implemented by polling the FIFO > > Status register until either Command Execute Completed or NACK Error > > bits are set. > > > > Signed-off-by: Cristian Ciocaltea > > Reviewed-by: Manivannan Sadhasivam > > Thanks, > Mani Thanks for reviewing, Cristi