From patchwork Thu Jan 21 14:27:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 12036397 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 2E55EC433E0 for ; Thu, 21 Jan 2021 14:41:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D977920691 for ; Thu, 21 Jan 2021 14:41:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731646AbhAUOk7 (ORCPT ); Thu, 21 Jan 2021 09:40:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729707AbhAUOkU (ORCPT ); Thu, 21 Jan 2021 09:40:20 -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 0DD90C061793 for ; Thu, 21 Jan 2021 06:27:28 -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 1l2ave-0002Ql-GF; Thu, 21 Jan 2021 15:27:18 +0100 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1l2avd-0001fm-Th; Thu, 21 Jan 2021 15:27:17 +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 v1 0/2] add support for GPIO based counter Date: Thu, 21 Jan 2021 15:27:14 +0100 Message-Id: <20210121142716.6374-1-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: linux-iio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org 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 | 245 ++++++++++++++++++ 4 files changed, 294 insertions(+) create mode 100644 Documentation/devicetree/bindings/counter/gpio-pulse-counter.yaml create mode 100644 drivers/counter/gpio-pulse-cnt.c