From patchwork Mon Aug 9 12:37:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Breathitt Gray X-Patchwork-Id: 12426375 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 ED85FC4338F for ; Mon, 9 Aug 2021 12:38:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D30D061002 for ; Mon, 9 Aug 2021 12:38:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235513AbhHIMjK (ORCPT ); Mon, 9 Aug 2021 08:39:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235433AbhHIMjF (ORCPT ); Mon, 9 Aug 2021 08:39:05 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94520C06179B; Mon, 9 Aug 2021 05:38:44 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id cp15-20020a17090afb8fb029017891959dcbso6487009pjb.2; Mon, 09 Aug 2021 05:38:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Aujji+42NnuAmjXYd1m2CztTTlNY+0bpT1pWUi5S9DQ=; b=kzz6az3z6et7KhxgY3vX44tbU0yZBJApzrgVen5z1mF2Porf/u4jniGhHLjDvAKMiF ThEid/Gcd4xasous3xga7a/HCRLj4hHXcRQxGw0qu6IVxpkTfi6mvCZvghCnMmivN9Cs Y/MUP6a0GFBjPemYHjUhwILTAgujZVecYnOkEv0HwjGTtCtn2mlpqeTDywhB0NYS+a7G GqoX16sAoUb3SOWUKu7UV9tviidXmsGyp9jk0Eh+cqoD07pfeAbme4kzScaMAGIrh21R jR8/8E5FJY6ZbWIPzvb4tCG0j77O+6EB3pt/5clXDlNz1CbigD0q0Xb92eZRwWKJpLkf SrHQ== 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=Aujji+42NnuAmjXYd1m2CztTTlNY+0bpT1pWUi5S9DQ=; b=KuKwntgR7gfnolBFf1mgyxELjVT+wVWDRksVoerNFKbn2HfZRjdebpPePYs16KmZtw b0jt/ebGwHXZ+/EpcgvD4IRcvKtDdnnJd94YLa7+gVG8JXgPnOn4jLSkQLOEUCh6gpTc V+bxRm4JEQ2CVrXGywWPGeJeYb0T0TH81EzXpbUXZHXWBKAVxPw7AAVRGwD8fX3/SyoH FnVprsRpepbwXFBqGDgC3yCjCC8oID6qthLMMLpUzw1ugoVhpIKDom+PnmEH3ozRzq5P f8D4jmYTf2zsW0CI1zvjW47eJMAsDhYaUtW0Xqh0qDtWsFBfGG/2KHcjhZO9wIlb424S VaFQ== X-Gm-Message-State: AOAM531aRnV/E1g2YRvMM8hMV118A0oXCrbYEDOP/kJDRNM8dmsesC22 E6vNXgCQnwHJf1FgNed0QVk= X-Google-Smtp-Source: ABdhPJxS/bYR3iR3HOd30aoCTBsoHMn9la7Dd92DWiXNVNNhNRMlO7P2Icstww/r5chWL15C1/HV/w== X-Received: by 2002:a63:788e:: with SMTP id t136mr253952pgc.374.1628512724221; Mon, 09 Aug 2021 05:38:44 -0700 (PDT) Received: from localhost.localdomain ([156.146.35.76]) by smtp.gmail.com with ESMTPSA id e35sm22382177pjk.28.2021.08.09.05.38.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Aug 2021 05:38:43 -0700 (PDT) From: William Breathitt Gray To: jic23@kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com, kernel@pengutronix.de, a.fatoum@pengutronix.de, kamel.bouhara@bootlin.com, gwendal@chromium.org, alexandre.belloni@bootlin.com, david@lechnology.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, syednwaris@gmail.com, patrick.havelange@essensium.com, fabrice.gasnier@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, o.rempel@pengutronix.de, jarkko.nikula@linux.intel.com, William Breathitt Gray , Dan Carpenter Subject: [PATCH v15 10/13] counter: Implement *_component_id sysfs attributes Date: Mon, 9 Aug 2021 21:37:35 +0900 Message-Id: <2ecfebc5652f9595c79be87c0e7e64d9276d2032.1628511445.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The Generic Counter chrdev interface expects users to supply component IDs in order to select extensions for requests. In order for users to know what component ID belongs to which extension this information must be exposed. The *_component_id attribute provides a way for users to discover what component ID belongs to which respective extension. Cc: David Lechner Cc: Gwendal Grignou Cc: Dan Carpenter Signed-off-by: William Breathitt Gray --- Documentation/ABI/testing/sysfs-bus-counter | 16 +++++++++- drivers/counter/counter-sysfs.c | 33 +++++++++++++++++---- 2 files changed, 42 insertions(+), 7 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter index 9809d8a47431..e0e99adb0ecc 100644 --- a/Documentation/ABI/testing/sysfs-bus-counter +++ b/Documentation/ABI/testing/sysfs-bus-counter @@ -203,12 +203,26 @@ Description: both edges: Any state transition. +What: /sys/bus/counter/devices/counterX/countY/ceiling_component_id +What: /sys/bus/counter/devices/counterX/countY/floor_component_id +What: /sys/bus/counter/devices/counterX/countY/count_mode_component_id +What: /sys/bus/counter/devices/counterX/countY/direction_component_id +What: /sys/bus/counter/devices/counterX/countY/enable_component_id +What: /sys/bus/counter/devices/counterX/countY/error_noise_component_id +What: /sys/bus/counter/devices/counterX/countY/prescaler_component_id +What: /sys/bus/counter/devices/counterX/countY/preset_component_id +What: /sys/bus/counter/devices/counterX/countY/preset_enable_component_id What: /sys/bus/counter/devices/counterX/countY/signalZ_action_component_id +What: /sys/bus/counter/devices/counterX/signalY/cable_fault_component_id +What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable_component_id +What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler_component_id +What: /sys/bus/counter/devices/counterX/signalY/index_polarity_component_id +What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_component_id KernelVersion: 5.15 Contact: linux-iio@vger.kernel.org Description: Read-only attribute that indicates the component ID of the - respective Synapse of Count Y for Signal Z. + respective extension or Synapse. What: /sys/bus/counter/devices/counterX/countY/spike_filter_ns KernelVersion: 5.14 diff --git a/drivers/counter/counter-sysfs.c b/drivers/counter/counter-sysfs.c index 11bef9f8190f..df1d75e0d7b8 100644 --- a/drivers/counter/counter-sysfs.c +++ b/drivers/counter/counter-sysfs.c @@ -588,6 +588,7 @@ static int counter_signal_attrs_create(struct counter_device *const counter, int err; struct counter_comp comp; size_t i; + struct counter_comp *ext; /* Create main Signal attribute */ comp = counter_signal_comp; @@ -603,8 +604,14 @@ static int counter_signal_attrs_create(struct counter_device *const counter, /* Create an attribute for each extension */ for (i = 0; i < signal->num_ext; i++) { - err = counter_attr_create(dev, cattr_group, signal->ext + i, - scope, signal); + ext = &signal->ext[i]; + + err = counter_attr_create(dev, cattr_group, ext, scope, signal); + if (err < 0) + return err; + + err = counter_comp_id_attr_create(dev, cattr_group, ext->name, + i); if (err < 0) return err; } @@ -695,6 +702,7 @@ static int counter_count_attrs_create(struct counter_device *const counter, int err; struct counter_comp comp; size_t i; + struct counter_comp *ext; /* Create main Count attribute */ comp = counter_count_comp; @@ -719,8 +727,14 @@ static int counter_count_attrs_create(struct counter_device *const counter, /* Create an attribute for each extension */ for (i = 0; i < count->num_ext; i++) { - err = counter_attr_create(dev, cattr_group, count->ext + i, - scope, count); + ext = &count->ext[i]; + + err = counter_attr_create(dev, cattr_group, ext, scope, count); + if (err < 0) + return err; + + err = counter_comp_id_attr_create(dev, cattr_group, ext->name, + i); if (err < 0) return err; } @@ -784,6 +798,7 @@ static int counter_sysfs_attr_add(struct counter_device *const counter, struct device *const dev = &counter->dev; int err; size_t i; + struct counter_comp *ext; /* Add Signals sysfs attributes */ err = counter_sysfs_signals_add(counter, cattr_group); @@ -816,8 +831,14 @@ static int counter_sysfs_attr_add(struct counter_device *const counter, /* Create an attribute for each extension */ for (i = 0; i < counter->num_ext; i++) { - err = counter_attr_create(dev, cattr_group, counter->ext + i, - scope, NULL); + ext = &counter->ext[i]; + + err = counter_attr_create(dev, cattr_group, ext, scope, NULL); + if (err < 0) + return err; + + err = counter_comp_id_attr_create(dev, cattr_group, ext->name, + i); if (err < 0) return err; }