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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 D12E8C433DB for ; Mon, 15 Mar 2021 16:25:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A267C64F26 for ; Mon, 15 Mar 2021 16:25:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229854AbhCOQZG (ORCPT ); Mon, 15 Mar 2021 12:25:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233209AbhCOQYe (ORCPT ); Mon, 15 Mar 2021 12:24:34 -0400 Received: from mail-lj1-x229.google.com (mail-lj1-x229.google.com [IPv6:2a00:1450:4864:20::229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 374FCC061762 for ; Mon, 15 Mar 2021 09:24:34 -0700 (PDT) Received: by mail-lj1-x229.google.com with SMTP id z25so16972504lja.3 for ; Mon, 15 Mar 2021 09:24:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+jijPdUSqMWGA4azd9UUsLc7iUCEpYRxzK2+H3ibJFc=; b=HBfH0hJjHZsJUIABSUUUnDm9OcQhN+J/+SjcbxyL9bvFjPm4gci2HRaUu7JRaOiIhT FyldEpW+pn1sucRDLZXbYYakoJqm9/lcum8y1SjpY5QhppT9fF1l52QMBkK2DC8JMSwE HcurWBp6osin0yQ976e4QdBXl6CtJHbgziNo4IEWI9GaIIDNeC/NFPJQo+X/jItD/ccb qwZShnN2J750y0dlOUTCon4cgZx/QvffWIKnEkTc/WhDfNTzTkvWQ/mSjZvgOQQblqaS 4qAEPJhPhFJ6XPu76NtDXSYJ0iu6MpSuwanMeuTya0F0v9btVjtSl/XpeveRtuUwiAsN vE3A== 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=+jijPdUSqMWGA4azd9UUsLc7iUCEpYRxzK2+H3ibJFc=; b=kNmpByU39+k/fiFYWQNNzbQ4pF1wFEDvMhtDX7VD9yfmxlAhPmRs2w+Nc8POsae+H+ SO7tjWyqyly3SfrHB2JJGAT5OfB5dJlu94JCiiKQsUNVtFzpoB1i4SXl7vtUZg5fYWDT QXrCkL6Gox0O4dz0tWF9MwFC3vUaWLYcqgM7bjhzDhsuifwfUFlKhwhdzBUELSOcbns/ Zn8RhR7qpJ+wd9CYnbwkxhgCCrROoUbnR8Zcdd4/bjcXc/GbYLnFawUyF1QJdEhj0jif ExON6rHLI9IJD46jZJXjdt/kGbIV8Rx6X/iV4j+TybXhSsj6A1TcW+C2z1tJonmSB5fU HjTg== X-Gm-Message-State: AOAM53155+s0IXHkKBnAjwB66Ius4lB7U4UJllZ2cKWKY5XJQJfpMIZM 5lDjcVUuKTNgnXI52nfx2c6HQCadwKeAa1GAcKpqikN67+jGEcx2 X-Google-Smtp-Source: ABdhPJyxd/mpXT0lN/bRNEsisnm6+S01PvbUvL2Q8FY2E6phgBdUpAOl8aU+deK9u8wVwU9D+/gtaXhvcy+c7qQjBcE= X-Received: by 2002:a05:651c:103a:: with SMTP id w26mr11107541ljm.273.1615825472712; Mon, 15 Mar 2021 09:24:32 -0700 (PDT) MIME-Version: 1.0 References: <20210302053059.1049035-1-drew@beagleboard.org> <20210302053059.1049035-3-drew@beagleboard.org> <349b09f8-fe99-d0d4-dd11-c288bf66cb4d@metux.net> In-Reply-To: <349b09f8-fe99-d0d4-dd11-c288bf66cb4d@metux.net> From: Linus Walleij Date: Mon, 15 Mar 2021 17:24:21 +0100 Message-ID: Subject: Re: [PATCH v9 2/4] pinctrl: pinmux: Add pinmux-select debugfs file To: "Enrico Weigelt, metux IT consult" Cc: Drew Fustini , "open list:GPIO SUBSYSTEM" , "linux-kernel@vger.kernel.org" , Tony Lindgren , Andy Shevchenko , Alexandre Belloni , Geert Uytterhoeven , Pantelis Antoniou , Jason Kridner , Robert Nelson , Joe Perches , Dan Carpenter , Jonathan Corbet , Linux Doc Mailing List , Geert Uytterhoeven Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On Fri, Mar 12, 2021 at 2:57 PM Enrico Weigelt, metux IT consult wrote: > On 02.03.21 06:30, Drew Fustini wrote: > > Hi folks, > > > Add "pinmux-select" to debugfs which will activate a pin function for a > > given pin group: > > > > echo "" > pinmux-select > > > > The write operation pinmux_select() handles this by checking that the > > names map to valid selectors and then calling ops->set_mux(). > > I've already been playing with similar idea, but for external muxes. > For example, some boards have multiple SIM slots that can be switched > via some gpio pin. > > Not sure whether traditional pinmux would be a good match for that. What is wrong with the subsystem drivers/mux? It's exactly for this usecase I think. Peter Rosin already wrote a GPIO-controlled mux driver too. Yours, Linus Walleij