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=-3.6 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,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 9E066C55179 for ; Thu, 29 Oct 2020 17:20:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 372B62087E for ; Thu, 29 Oct 2020 17:20:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="j/q/nLAG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725948AbgJ2RUW (ORCPT ); Thu, 29 Oct 2020 13:20:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725803AbgJ2RUV (ORCPT ); Thu, 29 Oct 2020 13:20:21 -0400 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47998C0613CF; Thu, 29 Oct 2020 10:20:20 -0700 (PDT) Received: by mail-pf1-x443.google.com with SMTP id b3so2915669pfo.2; Thu, 29 Oct 2020 10:20:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=S6Uz54WuxnDJ+k4Eco5IKqgdA9hb/8pbhmxkv/FMSmM=; b=j/q/nLAGZfY9GIST0ARhhpYeBgZyoLu1xoaxwc6RZP45InpbchoeqONc3771SdTm0z qTfgR1rKryboQSJjmQwxfPUPCXqEqmczYK5EKdVOzIHbcdsxXNvgaT8lcCAjYXD7IoBf jqf9RIFyEUsrm43x6t1ar4ggrwCiBQExJqeiEjTfr1GkqL7Q2awzwbK7Bgw3mj92MNeI 7pE7c4OQkE5NKV0NPTePaHEAEzcO419VRAUrr3twD1pyfVH7RaagLq2aSFhVGzdcFa17 7bILTiycCNOii1b70W0mpgU5qRb5X6LM2C4lIZcG1DVdVOlv61uOGaDtqi/XJmbgWI2e L1hw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=S6Uz54WuxnDJ+k4Eco5IKqgdA9hb/8pbhmxkv/FMSmM=; b=aq/qbyG0KfbXmKb9M6RKEdI0v1kT/Dr1c5795jWAELwH5or2q9bcp7D8S+bYeDesyS x2OmyoGJrtHSCB3bL8fvo/hz41sDiZSSUddlXx7YZ1EfRyhUlR5j3Ra6gLiTAXC9uQK4 FRsE0AVrbV8ZIjJfh+PmXFsRLru3pXon7Zj7yIEKspbouDgYsxe3uqdIuxnz2MWIGnb7 MFXfThJWXap6b3JEWeuPUCMRnmYjUbjqa5PjKrCrt6sQc65iUkUSHHWUgqay3Ea3CSbT P/KOcEL2UkESFNwdSCL9M00SCgyCT6BqCGEtd30aIPMvUxyo7knFmd075sqHGSSh8dSZ u8Qw== X-Gm-Message-State: AOAM532ZA9IIGPPYejPXSb2UF5qPr29I1DXme3butG8sztvhQWLSK51m kjKn/if3WH+RTe0UvG1aUdkW4B7sAStBpW/pFGuvmZrsvBc= X-Google-Smtp-Source: ABdhPJwFJT3T243YU8PhF0+GmN89Ub+5YNo/oaEw7I7FmY1FPHJhilZqPozPhipGzu6JGF2APB9sR3T6yN6Jq+GfayE= X-Received: by 2002:a63:1e02:: with SMTP id e2mr4778017pge.74.1603992019848; Thu, 29 Oct 2020 10:20:19 -0700 (PDT) MIME-Version: 1.0 References: <20201028205101.47583-1-andriy.shevchenko@linux.intel.com> <20201028205101.47583-2-andriy.shevchenko@linux.intel.com> <20201029144656.GD4077@smile.fi.intel.com> In-Reply-To: From: Andy Shevchenko Date: Thu, 29 Oct 2020 19:20:03 +0200 Message-ID: Subject: Re: [PATCH v1 2/3] Documentation: firmware-guide: gpio-properties: active_low only for GpioIo() To: Ricardo Ribalda Cc: Andy Shevchenko , Mika Westerberg , ACPI Devel Maling List , "Rafael J. Wysocki" , "open list:GPIO SUBSYSTEM" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Thu, Oct 29, 2020 at 7:17 PM Andy Shevchenko wrote: > On Thu, Oct 29, 2020 at 4:55 PM Ricardo Ribalda wrote: > > On Thu, Oct 29, 2020 at 3:45 PM Andy Shevchenko > > wrote: > > > On Wed, Oct 28, 2020 at 10:10:42PM +0100, Ricardo Ribalda wrote: > > ... > > > > ActiveLevel field is described in 19.6.55 GpioInt (GPIO Interrupt Connection > > > Resource Descriptor Macro). > > > > > > > Without using the active_low, how can we describe a pin that is > > > > active low and has to trigger an irq on both edges? > > > > > > This is nonsense. > > > What does it mean? > > > > Let me try to explain myself again: > > > > I have a gpio pin that produces IRQs on both edges. so ActiveLevel is Both > > > > The problem is that the value of that pin is inverted: Low means 1 and > > high means 0. > > > > How can I describe that the pin "is inverted" without using the _DSD field? > > "Both edges" and "inverted" or "polarity low" in one sentence make no sense. To be on the constructive side, I can *imagine* so badly designed hardware that uses level and edge at the same time, but before I go to conclusions, can you share relevant (pieces of) datasheet? -- With Best Regards, Andy Shevchenko