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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 3D2E3C04A6B for ; Sun, 12 May 2019 17:43:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0F79721019 for ; Sun, 12 May 2019 17:43:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="fjM1S5rH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726943AbfELRnY (ORCPT ); Sun, 12 May 2019 13:43:24 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:39365 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726529AbfELRnY (ORCPT ); Sun, 12 May 2019 13:43:24 -0400 Received: by mail-pf1-f194.google.com with SMTP id z26so5884673pfg.6; Sun, 12 May 2019 10:43:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=RpfQWsV4Cbteqis6flWSQny0WpQ+Omw4oCErU7z7boU=; b=fjM1S5rHQqQcQd4WKjcxpSpf/RFROidSPqgD621jf1QPwRyL0r+h5EwLAMqv1Obsbq CGGMdJweC0t63KEYmq6MWkdav2WloDvQoZN/SJxecAMgoOkQ/K7fAxBZ1pC9l/dPGndk C4L/Jc9sIsCmgfqorFyGMPsz3wN+i/jthDI6dq0zfn61d4iJhN15CAPJD2vDiJht2+/1 JEcSDTmE/mtYq0qyn3NONfVE4e1IyE1/Azv6YEtO68QeCVlgg4DNNKKEILhpGrobLQD7 T2BgJHi0qQmeBhVNWv0iF5qX7FUdEBYgHpH56YzJ1+Xn4a3IBzxGpkzmh2Y4vA1pBH9v 29iQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=RpfQWsV4Cbteqis6flWSQny0WpQ+Omw4oCErU7z7boU=; b=XknaEIH+x8U1+WW+XSVW4p52KoWDePrxymTLGOLg6XBU1fm9hIna3mNjkL54wpPRec U3Ei6IjdHpgEk/WJtXhQ+9BL13kFJqNdlU6XewgNHLfaLbD9VrvgQ3piaAiQip4xV6sP OiI+ZS1sjAno+sng7zBug5bVT0AYzcF8LBgIcJOJOATc7bazxOCrUcfTgQm+E6rUdXpw 4mMMABy7/1fnEQqVbiGtUXjEJlH+jyoQPU8JEFgrnPfAMd9NEfkPl1210k6kpHQwkmQI xNcImoRy1hIUM+v68sBXqu5+NUw0eETvrg/1Cacgchzit8sxPpTt3jTCtJMh3oY2FzPG zFzw== X-Gm-Message-State: APjAAAVwclL4qchHd62LMxWal3mJKqq5W14IucumH7BsEHI9ND53lBha zTbk3JkoSjA5DatHa+artSRCoga5 X-Google-Smtp-Source: APXvYqwA2JLRsVBcHD5XrPTOoDV9t5KwrAn9xuuMjj9Ou0loLok0YzAVyBhvlltiUo/rZLTLoCgOBA== X-Received: by 2002:a63:170a:: with SMTP id x10mr25927719pgl.355.1557683003371; Sun, 12 May 2019 10:43:23 -0700 (PDT) Received: from [192.168.2.145] (ppp94-29-35-107.pppoe.spdop.ru. [94.29.35.107]) by smtp.googlemail.com with ESMTPSA id m6sm1125842pgr.18.2019.05.12.10.43.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 12 May 2019 10:43:22 -0700 (PDT) Subject: Re: [RFC PATCH v1 5/6] soc/tegra: regulators: Add regulators coupler for Tegra20 To: Mark Brown Cc: Liam Girdwood , Thierry Reding , Jonathan Hunter , Peter De Schrijver , linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org References: <20190414175939.12368-1-digetx@gmail.com> <20190414175939.12368-6-digetx@gmail.com> <20190508075706.GW14916@sirena.org.uk> <9756d8ca-0778-5185-5b6b-3168d63819ec@gmail.com> <20190512090627.GO21483@sirena.org.uk> From: Dmitry Osipenko Message-ID: <586b4f29-1937-2d7b-3944-c29311502878@gmail.com> Date: Sun, 12 May 2019 20:42:39 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190512090627.GO21483@sirena.org.uk> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 12.05.2019 12:06, Mark Brown пишет: > On Wed, May 08, 2019 at 04:10:58PM +0300, Dmitry Osipenko wrote: > >> 1) CORE and RTC have max-spread voltage of 170mV. >> 2) CORE and RTC voltages must be higher than the CPU voltage by at least >> 120mV. > > This seems like it should be easy enough to describe - we just need > minimum and maximum spreads between pairs of rails. > Yes, but the proper CORE/RTC minimum voltages shall be maintained until all drivers will get support for the voltage management, which likely to take a lot of time to get upstreamed. So I'd want to get at least some basics working for the start, later on it should be possible to consider generalization of the regulators coupling. Mark, are you okay with having the custom regulators coupler as an interim solution?