From patchwork Wed Aug 7 19:40:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 11082579 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A9C5C1398 for ; Wed, 7 Aug 2019 19:41:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9A82B28657 for ; Wed, 7 Aug 2019 19:41:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8DBA9288AC; Wed, 7 Aug 2019 19:41:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E0F4A288B3 for ; Wed, 7 Aug 2019 19:41:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389466AbfHGTlD (ORCPT ); Wed, 7 Aug 2019 15:41:03 -0400 Received: from vern.gendns.com ([98.142.107.122]:43638 "EHLO vern.gendns.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389462AbfHGTlC (ORCPT ); Wed, 7 Aug 2019 15:41:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lechnology.com; s=default; h=Message-Id:Date:Subject:Cc:To:From:Sender: Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=JokjWWho/2zfAnvvaFBEyWXOCT3O2zg4J7WISh2hl5A=; b=Eos7XohVKEfGrdxSBI9kjkfm/2 WmdwutJ4Yt9HAuWwSgA3QbXfiLcnfXu4i2QvMLKqYbdbY8MMtR/aBfEjRl5gQqbtMhaQFmoKOrssJ W51GaEZf890b3xuk4CFAzLdDiFbHBhmqbdSiA/rVQgetWbfYxNsWDePdYRhuNPEWzLUHCJSObQGwJ 3llycmnl3LZ/g6oPU4ThzdGv6cYiRpR3WgEcXTC98AIejQ+y5a7HWNpGoqBkzXdGtrrluh6zasKuq iIVtWiTsMwc/baJ8x33Kup63axtfkezowE+xunOo0JyhO0ViMwjbouR35vmDGakQEJpNmDHIu6Yed bmLb7P9w==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:60292 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.92) (envelope-from ) id 1hvRnv-00006r-Mm; Wed, 07 Aug 2019 15:40:59 -0400 From: David Lechner To: linux-iio@vger.kernel.org, linux-omap@vger.kernel.org Cc: David Lechner , Rob Herring , Mark Rutland , =?utf-8?q?Beno=C3=AEt_Cousson?= , Tony Lindgren , William Breathitt Gray , Thierry Reding , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org Subject: [PATCH v2 0/5] counter: new TI eQEP driver Date: Wed, 7 Aug 2019 14:40:18 -0500 Message-Id: <20190807194023.15318-1-david@lechnology.com> X-Mailer: git-send-email 2.17.1 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This series adds device tree bindings and a new counter driver for the Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP). As mentioned in one of the commit messages, to start with, the driver only supports reading the current counter value and setting the min/max values. Other features can be added as the counter subsystem gains support for them. v2 changes: - New patch to move TI PWMSS driver from drivers/pwm/ to drivers/bus/ - Device tree bindings converted to .yaml format - Device tree clock renamed from "fck" to "sysclkout" - Dropped unused index and strobe signals from counter driver - Added synapses and actions to counter driver - Fixed base in of kstrtouint() - Clarifications in commit messages This series has been tested on a BeagleBone Blue with the following script: #!/usr/bin/env python3 from os import path from time import sleep COUNTER_PATH = '/sys/bus/counter/devices' COUNTERS = ['counter0', 'counter1', 'counter2'] COUNT0 = 'count0' COUNT = 'count' FUNCTION = 'function' CEILING = 'ceiling' FLOOR = 'floor' ENABLE = 'enable' cnts = [] for c in COUNTERS: function_path = path.join(COUNTER_PATH, c, COUNT0, FUNCTION) with open(function_path, 'w') as f: f.write('quadrature x4') floor_path = path.join(COUNTER_PATH, c, COUNT0, FLOOR) with open(floor_path, 'w') as f: f.write(str(0)) ceiling_path = path.join(COUNTER_PATH, c, COUNT0, CEILING) with open(ceiling_path, 'w') as f: f.write(str(0xffffffff)) enable_path = path.join(COUNTER_PATH, c, COUNT0, ENABLE) with open(enable_path, 'w') as f: f.write('1') cnt_path = path.join(COUNTER_PATH, c, COUNT0, COUNT) cnts.append(open(cnt_path, 'r')) while True: for c in cnts: c.seek(0) val = int(c.read()) if val >= 0x80000000: val -= 0x100000000 print(val, end=' ') print() sleep(1) David Lechner (5): bus/ti-pwmss: move TI PWMSS driver from PWM to bus subsystem dt-bindings: counter: new bindings for TI eQEP counter: new TI eQEP driver ARM: dts: am33xx: Add nodes for eQEP ARM: dts: am335x-boneblue: Enable eQEP .../devicetree/bindings/counter/ti-eqep.yaml | 50 ++ MAINTAINERS | 6 + arch/arm/boot/dts/am335x-boneblue.dts | 54 ++ arch/arm/boot/dts/am33xx-l4.dtsi | 27 + drivers/bus/Kconfig | 9 + drivers/bus/Makefile | 1 + drivers/{pwm/pwm-tipwmss.c => bus/ti-pwmss.c} | 0 drivers/counter/Kconfig | 12 + drivers/counter/Makefile | 1 + drivers/counter/ti-eqep.c | 460 ++++++++++++++++++ drivers/pwm/Kconfig | 9 - drivers/pwm/Makefile | 1 - 12 files changed, 620 insertions(+), 10 deletions(-) create mode 100644 Documentation/devicetree/bindings/counter/ti-eqep.yaml rename drivers/{pwm/pwm-tipwmss.c => bus/ti-pwmss.c} (100%) create mode 100644 drivers/counter/ti-eqep.c