From patchwork Mon Feb 8 13:53:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 378721 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 87659C433DB for ; Mon, 8 Feb 2021 13:55:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5369864E4F for ; Mon, 8 Feb 2021 13:55:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231403AbhBHNyp (ORCPT ); Mon, 8 Feb 2021 08:54:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231709AbhBHNye (ORCPT ); Mon, 8 Feb 2021 08:54:34 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53E33C061786 for ; Mon, 8 Feb 2021 05:53:53 -0800 (PST) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l96z7-0006qI-Bw; Mon, 08 Feb 2021 14:53:49 +0100 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1l96z6-0004pH-Ie; Mon, 08 Feb 2021 14:53:48 +0100 From: Oleksij Rempel To: Rob Herring , William Breathitt Gray Cc: Oleksij Rempel , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Pengutronix Kernel Team , David Jander , Robin van der Gracht , linux-iio@vger.kernel.org, Linus Walleij , Jonathan Cameron Subject: [PATCH v5 0/2] add support for GPIO or IRQ based evemt counter Date: Mon, 8 Feb 2021 14:53:45 +0100 Message-Id: <20210208135347.18494-1-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: devicetree@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org changes v5: - rename it to event counter, since it support different event sources - make it work with gpio-only or irq-only configuration - update yaml binding changes v4: - use IRQ_NOAUTOEN to not enable IRQ by default - rename gpio_ from name pattern and make this driver work any IRQ source. changes v3: - convert counter to atomic_t changes v2: - add commas - avoid possible unhandled interrupts in the enable path - do not use of_ specific gpio functions Add support for GPIO based pulse counter. For now it can only count pulses. With counter char device support, we will be able to attach timestamps and measure actual pulse frequency. Never the less, it is better to mainline this driver now (before chardev patches go mainline), to provide developers additional use case for the counter framework with chardev support. Oleksij Rempel (2): dt-bindings: counter: add event-counter binding counter: add IRQ or GPIO based event counter .../bindings/counter/event-counter.yaml | 56 ++++ drivers/counter/Kconfig | 10 + drivers/counter/Makefile | 1 + drivers/counter/event-cnt.c | 250 ++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 Documentation/devicetree/bindings/counter/event-counter.yaml create mode 100644 drivers/counter/event-cnt.c Reviewed-by: Linus Walleij