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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E34F3C433E0 for ; Tue, 2 Mar 2021 18:06:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB20D64F1F for ; Tue, 2 Mar 2021 18:06:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350216AbhCBR5h (ORCPT ); Tue, 2 Mar 2021 12:57:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35920 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234646AbhCBFfK (ORCPT ); Tue, 2 Mar 2021 00:35:10 -0500 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54E82C06121D for ; Mon, 1 Mar 2021 21:32:18 -0800 (PST) Received: by mail-pg1-x536.google.com with SMTP id a4so13101929pgc.11 for ; Mon, 01 Mar 2021 21:32:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=beagleboard-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=AND5hR7g+etm8p1XQXNCrrPsiiY+ufosQMI5JJrzRVE=; b=K8lCA4A1uHoty55BpP30fhzuelUH2422FzM5XyB/82aEOA5s8Jc2Pgs1pEWiBARHZJ BQl/rNrns8TZZ3ExaMbFs9OZ5/1pqLO8alJmor3Sd7nfjHmpzqeM5cDtJEXy2Qi/309W 421xXN/4fvHLnYge+BcT9EoTKWNzKqc0SELYrRo3cU1QPhtfC7iqOzW1yVwOswg6ZDb7 zcjwnnD3DCiTlt7xxta+/eTAf3f3cXHfkmaTghgaoc+RGIjSKC+e9HUjr7OPFsoFS190 Ndf3AJb3ndkz+HcMgWIPB/dgvK9FxiS6OjhAOC0miRXWLZlistc5JY+uC2Krwokxad01 AV5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=AND5hR7g+etm8p1XQXNCrrPsiiY+ufosQMI5JJrzRVE=; b=TwYgo8HNSwTwjcBozhlr9TVwlgVnGAqtNeyGt94ymXi/2HbsJyHOti9yzvOYUhuw0+ Zan/yCC9xRWDj1mFOrSYZijRdypB7VB+MA1GzOprMgnYh5Se4Snb4kA6ecgBZVfSzh34 9fk1VcFf06wGxmNVRDtbmnMgV3lUtR+7ukO1BMzcN6dDPxdFOdRApUYWGbfvNAvVEvqA ZPzWQtb2goUqgfwKRQ9XL8AiwddvRTocVxBqGJgeU7SZIHziJbtsbFJEbPX26rNBPUFS tsF9OwQ3/ouKPPibWYd2Sz/2ZnOpFGefwPx1cmTEbjGSlCdYkZ1XB4n4F4XI92QJa98j UF1A== X-Gm-Message-State: AOAM530Snhl2bcJEGJ5GoBGF41oFatKG9OhFbApo7N4IVmoJd1gTfl00 7TkKmE/D06xLIDNNkL5Zeao7+g== X-Google-Smtp-Source: ABdhPJwR7z3pWYUC4wTDcM0bfq7Sktc8xgnJwNYrkaJBxgxBFwsQ1OUnnxNUFTqJB+axKz/ngiOIvg== X-Received: by 2002:a62:804a:0:b029:1e7:d747:de3 with SMTP id j71-20020a62804a0000b02901e7d7470de3mr1888106pfd.38.1614663137892; Mon, 01 Mar 2021 21:32:17 -0800 (PST) Received: from x1.hsd1.or.comcast.net ([2601:1c0:4701:ae70:37ab:7b44:a136:e385]) by smtp.gmail.com with ESMTPSA id o129sm17929757pgo.27.2021.03.01.21.32.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 21:32:16 -0800 (PST) From: Drew Fustini To: Linus Walleij , linux-gpio@vger.kernel.org, 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@vger.kernel.org Cc: Drew Fustini Subject: [PATCH v9 4/4] docs/pinctrl: document debugfs files Date: Mon, 1 Mar 2021 21:30:59 -0800 Message-Id: <20210302053059.1049035-5-drew@beagleboard.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210302053059.1049035-1-drew@beagleboard.org> References: <20210302053059.1049035-1-drew@beagleboard.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Document debugfs directories and files created for pinctrl subsystem. Suggested-by: Andy Shevchenko Reviewed-by: Andy Shevchenko Reviewed-by: Tony Lindgren Signed-off-by: Drew Fustini --- Documentation/driver-api/pin-control.rst | 37 ++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/Documentation/driver-api/pin-control.rst b/Documentation/driver-api/pin-control.rst index 3d2deaf48841..c905b273e833 100644 --- a/Documentation/driver-api/pin-control.rst +++ b/Documentation/driver-api/pin-control.rst @@ -1428,3 +1428,40 @@ on the pins defined by group B:: The above has to be done from process context. The reservation of the pins will be done when the state is activated, so in effect one specific pin can be used by different functions at different times on a running system. + + +Debugfs files +============= +These files are created in ``/sys/kernel/debug/pinctrl``: + +- ``pinctrl-devices``: prints each pin controller device along with columns to + indicate support for pinmux and pinconf + +- ``pinctrl-handles``: prints each configured pin controller handle and the + corresponding pinmux maps + +- ``pinctrl-maps``: print all pinctrl maps + +A sub-directory is created inside of ``/sys/kernel/debug/pinctrl`` for each pin +controller device containing these files: + +- ``pins``: prints a line for each pin registered on the pin controller. The + pinctrl driver may add additional information such as register contents. + +- ``gpio-ranges``: print ranges that map gpio lines to pins on the controller + +- ``pingroups``: print all pin groups registered on the pin controller + +- ``pinconf-pins``: print pin config settings for each pin + +- ``pinconf-groups``: print pin config settings per pin group + +- ``pinmux-functions``: print each pin function along with the pin groups that + map to the pin function + +- ``pinmux-pins``: iterate through all pins and print mux owner, gpio owner + and if the pin is a hog + +- ``pinmux-select``: write to this file to activate a pin function for a group:: + + echo "" > pinmux-select -- 2.25.1