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=-3.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 07D46C433E1 for ; Mon, 8 Jun 2020 14:24:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D08712081A for ; Mon, 8 Jun 2020 14:24:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="CZfPL8w5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726074AbgFHOYT (ORCPT ); Mon, 8 Jun 2020 10:24:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728988AbgFHOYT (ORCPT ); Mon, 8 Jun 2020 10:24:19 -0400 Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82A99C08C5C5 for ; Mon, 8 Jun 2020 07:24:18 -0700 (PDT) Received: by mail-wr1-x441.google.com with SMTP id r7so17639507wro.1 for ; Mon, 08 Jun 2020 07:24:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=fIhwy13PVaO5F8p6kg+GqvngU7Ke/x9Dg12+TRbhC9I=; b=CZfPL8w5fOBsBIx+z/oomYpe+rnOnlu08HlfeLxZxWn4DvD8EV1jvidfa2G6obPNXw wcLLWFtkhMqdqFwD6ucKN3p6mzAsg7HanEknR4Sla4G+4jcKzr/fpU1V57aBb/7AYoPw a+qTL3H1zDbkTzdEZSwS+EOshh5JBGPjQ8vruPaNy4+5DBNBZZqQkTMEdK4IxTK5NACU GGIM6BOSbSswTePVvH+wIByXOpNUEHdrrZU7+rCQFlWfiin1e/xF6lbhT4X8YtTuAVEZ Fa5yd03P+4vcSrJt3xaJlQ1FH4O1ETJFfjANj9H1Awd+M9I8eobjJwDd948h9av12Eua cTdw== 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:content-transfer-encoding :in-reply-to; bh=fIhwy13PVaO5F8p6kg+GqvngU7Ke/x9Dg12+TRbhC9I=; b=MMRMgYaP+L6AqNdnTpji77PmulgNi0eoPhqBoXtx5hvUdutguKlB3LCmmfwlWyHtpJ 3L88AJuiW2W+RILgyvY5eooqyTN1fgTEhcs4ci+MGmxune4F9WNg+Qb0Re+d2acX3e83 9PsbYGOisNMT3OYLeb5Nk3ciyPJU0+S8UgLLtGlvj26fY6KsSRCT/I/RcMbZHs+Ja0An VAM3ua6rzHVyt9dpqtJSmRqAUoxkWcUFVY4QQUaPniRS//jQl4omQUsIDMXiX5GqKyG7 9LgZrOISb8pYEcY4SPirKs+8paBE9vrzV9uDFkUTPaIU77/rweUi2Hq6kXz3KxLxiQou tj5g== X-Gm-Message-State: AOAM532aBNriwzYf1BWZg6xYmPhP3bzWthrG7uUgCZAXgHIbQ2Iatpsl JLEkq9UeLtF1N4ySK9kI+sTG/A== X-Google-Smtp-Source: ABdhPJweehatGIr1BA4m4b/1jQsQ1TEclLtHNU4cdgilO6fq2rqBkF/6wa0DUib7fHXp5oiaj3ZdVg== X-Received: by 2002:adf:f208:: with SMTP id p8mr21462928wro.388.1591626257005; Mon, 08 Jun 2020 07:24:17 -0700 (PDT) Received: from dell ([95.147.198.92]) by smtp.gmail.com with ESMTPSA id o15sm22497715wmm.31.2020.06.08.07.24.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jun 2020 07:24:15 -0700 (PDT) Date: Mon, 8 Jun 2020 15:24:13 +0100 From: Lee Jones To: Michael Walle Cc: Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Thierry Reding , Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v3 03/16] mfd: mfd-core: match device tree node against reg property Message-ID: <20200608142413.GA4106@dell> References: <20200423174543.17161-1-michael@walle.cc> <20200423174543.17161-4-michael@walle.cc> <67e90dafd67c285158c2c6f67f92edb7@walle.cc> <20200515102848.GH271301@dell> <159e68b4ce53630ef906b2fcbca925bd@walle.cc> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <159e68b4ce53630ef906b2fcbca925bd@walle.cc> Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org On Mon, 25 May 2020, Michael Walle wrote: > Am 2020-05-15 12:28, schrieb Lee Jones: > > On Thu, 30 Apr 2020, Michael Walle wrote: > > > > > Hi Lee, > > > > > > Am 2020-04-23 19:45, schrieb Michael Walle: > > > > There might be multiple children with the device tree compatible, for > > > > example if a MFD has multiple instances of the same function. In this > > > > case only the first is matched and the other children get a wrong > > > > of_node reference. > > > > Add a new option to match also against the unit address of the child > > > > node. Additonally, a new helper OF_MFD_CELL_REG is added. [...] > > > > diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h > > > > index d01d1299e49d..c2c0ad6b14f3 100644 > > > > --- a/include/linux/mfd/core.h > > > > +++ b/include/linux/mfd/core.h > > > > @@ -13,8 +13,11 @@ > > > > #include > > > > > > > > #define MFD_RES_SIZE(arr) (sizeof(arr) / sizeof(struct resource)) > > > > +#define MFD_OF_REG_VALID BIT(31) > > > > What about 64bit platforms? > > The idea was to have this as a logical number. I.e. for now you may only > have one subdevice per unique compatible string. In fact, if you have a > look at the ab8500.c, there are multiple "stericsson,ab8500-pwm" > subdevices. But there is only one DT node for all three of it. I guess > this works as long as you don't use phandles to reference the pwm node > in the device tree. Or you don't want to use device tree properties > per subdevice (for example the "timeout-sec" of a watchdog device). This is not a good example, as the "stericsson,ab8500-pwm" is legitimate. Here we are registering 3 potential devices, but only instantiating 1 of them. -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog