From patchwork Thu Mar 7 13:32:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrice Gasnier X-Patchwork-Id: 13585581 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AB2D8C54798 for ; Thu, 7 Mar 2024 13:34:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=h726xM21Mq6Pxj5/rAXfbZq3BzJYwm3vmoTlsFvTmbI=; b=ITCgaCtyBxYuUc O5H9xiSvcnFxeSkSYIAuMIbsQQUhe7bAzgjAAki8728o20B7zLNVgt+qrN3LkDdUYi+XCX34US7Lc 93ZYOOW9ZOlXqdY3kF0rVt6j67mBJv42KwF2eVer6bhN/DX5j8JzqifBUSUgNqu96iCUGO/zDVkwJ eiilMarLPARr/o7OtZM5sGHdDCqfKU9Lzxi7P1ljGvWBDBZYjBhB0z7vz3vzKQ+6ojV+m58E3WfkC 9HJ7DzHFXAsE7y/Ig45lHK7yJaqw6HmuETdPBlf2VydkxiESeaLwyG+olfOIqCEm8/Xo/ohUl4cYi zk/6irPHKFmrQa6mM2+g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1riDt7-00000004kTo-08Ao; Thu, 07 Mar 2024 13:34:21 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1riDsy-00000004kPY-2blU for linux-arm-kernel@lists.infradead.org; Thu, 07 Mar 2024 13:34:15 +0000 Received: from pps.filterd (m0369458.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 4279qNWo012206; Thu, 7 Mar 2024 14:33:53 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding:content-type; s=selector1; bh=7LeJn9+ Q9QIQtH5uQXab1IA8eA4efREKX5wOGGIBS3M=; b=BSM3Rc2sTkwW/SSubKD6fLC 05z9P3/Fm2m48yRgq+w9jQ8/5phafEptIDVMXf7zaHOZtjHRn/W0MKm7C8ARTUap V18vADY8+pIyXUXZBb3mVQNibh+EHyOgyAQd0jFp4IliSMU7PGzpijnp+gDG+JQj 6x6G2H9cfzJYbMEsg0hIC8/IJ9eaVsrLz644TnKqZNJrbdcsRhI5u9lpDEvg4gdC nnULL6foMcqKriiWuBT5QndpYxDYkBJtTpZWWsPyG9uiBMd3dv1Qf+JVRrVAGG59 SHFXpCq0HXDkcJbcdnfQ1qnD062Cgu1vrNVBNc03JTRsDitYNSU488DSB4fEjyA= = Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3wmej5dtn8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 07 Mar 2024 14:33:53 +0100 (CET) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 9EFE94002D; Thu, 7 Mar 2024 14:33:49 +0100 (CET) Received: from Webmail-eu.st.com (shfdag1node2.st.com [10.75.129.70]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id C987F279E99; Thu, 7 Mar 2024 14:33:25 +0100 (CET) Received: from localhost (10.201.22.191) by SHFDAG1NODE2.st.com (10.75.129.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 7 Mar 2024 14:33:25 +0100 From: Fabrice Gasnier To: CC: , , , , , , Subject: [PATCH v5 00/10] counter: Add stm32 timer events support Date: Thu, 7 Mar 2024 14:32:56 +0100 Message-ID: <20240307133306.383045-1-fabrice.gasnier@foss.st.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.201.22.191] X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SHFDAG1NODE2.st.com (10.75.129.70) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-07_08,2024-03-06_01,2023-05-22_02 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240307_053412_981912_988B2384 X-CRM114-Status: GOOD ( 13.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Improves the stm32 timer counter driver by introducing new signals, e.g. counting frequency, and missing channels. It also adds support for interrupt based events using the chrdev interface. Two event types are added in this series: overflows and capture. Up to now, stm32 timer counter driver focused mainly on quadrature encoder feature on channel 1 & 2. It was limited to timers that has the HW quadrature encoder. With this series, all timer instances can be enabled for: - Quadrature encoder on channel 1 and channel 2 (when supported in HW) - Simple counting on internal clock - Capture counter value when rising and falling edges are observed at channel 1 to channel 4 input (number of channels varies depending on the timer instance used) - Push overflow and/or capture events through the chardev interface Changes in v5: - Rebase on counter-next, where COUNTER_COMP_FREQUENCY() has been applied - Add collected Reviewed-by Changes in v4: - Introduce new COUNTER_COMP_FREQUENCY() macro - Mainly update two last patchs, to address William's review comments (details in each patch) Changes in V3: - This series has been split [1] and renamed. [1] https://lore.kernel.org/lkml/20230922143920.3144249-1-fabrice.gasnier@foss.st.com/ - Watch events tool patch applied, hence dropped from this series - Refactor / split several patches - Keep original signals order, to avoid breaking existing user space - Don't adjust number of signals: adopt static configuration. rely on error mechanism to manage diversity across STM32 Timers instances. Changes in v2: - counter fix and improvement patch applied, hence dropped in v2 series - mfd patch applied, hence dropped in v2 series - revisit watch events tool (mainly command line interface) - add one patch to rename STM32 Timer counter - various review comments from v1 Fabrice Gasnier (10): counter: stm32-timer-cnt: rename quadrature signal counter: stm32-timer-cnt: rename counter counter: stm32-timer-cnt: adopt signal definitions counter: stm32-timer-cnt: introduce clock signal counter: stm32-timer-cnt: add counter prescaler extension counter: stm32-timer-cnt: add checks on quadrature encoder capability counter: stm32-timer-cnt: introduce channels counter: stm32-timer-cnt: probe number of channels from registers counter: stm32-timer-cnt: add support for overflow events counter: stm32-timer-cnt: add support for capture events drivers/counter/stm32-timer-cnt.c | 461 +++++++++++++++++++++++++++++- include/linux/mfd/stm32-timers.h | 13 + 2 files changed, 460 insertions(+), 14 deletions(-)