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=-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=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 867C5C433E0 for ; Fri, 22 Jan 2021 11:32:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39DCC2376F for ; Fri, 22 Jan 2021 11:32:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728332AbhAVLbz (ORCPT ); Fri, 22 Jan 2021 06:31:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728365AbhAVL2d (ORCPT ); Fri, 22 Jan 2021 06:28:33 -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 BCCE7C061797 for ; Fri, 22 Jan 2021 03:27:02 -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 1l2uae-0000Wu-In; Fri, 22 Jan 2021 12:26:56 +0100 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1l2uae-0007d6-0w; Fri, 22 Jan 2021 12:26:56 +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 Subject: [PATCH v2 0/2] add support for GPIO based counter Date: Fri, 22 Jan 2021 12:24:32 +0100 Message-Id: <20210122112434.27886-1-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 gpio-pulse-counter binding counter: add GPIO based pulse counters .../bindings/counter/gpio-pulse-counter.yaml | 39 +++ drivers/counter/Kconfig | 9 + drivers/counter/Makefile | 1 + drivers/counter/gpio-pulse-cnt.c | 244 ++++++++++++++++++ 4 files changed, 293 insertions(+) create mode 100644 Documentation/devicetree/bindings/counter/gpio-pulse-counter.yaml create mode 100644 drivers/counter/gpio-pulse-cnt.c -- 2.30.0