From patchwork Wed Apr 3 14:11:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Belloni X-Patchwork-Id: 1076011 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bootlin.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44Z7L45DC9z9sNt for ; Thu, 4 Apr 2019 01:11:40 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726352AbfDCOLj (ORCPT ); Wed, 3 Apr 2019 10:11:39 -0400 Received: from relay3-d.mail.gandi.net ([217.70.183.195]:54219 "EHLO relay3-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726084AbfDCOLj (ORCPT ); Wed, 3 Apr 2019 10:11:39 -0400 X-Originating-IP: 109.213.83.19 Received: from localhost (alyon-652-1-60-19.w109-213.abo.wanadoo.fr [109.213.83.19]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay3-d.mail.gandi.net (Postfix) with ESMTPSA id 5095560007; Wed, 3 Apr 2019 14:11:36 +0000 (UTC) From: Alexandre Belloni To: Daniel Lezcano , Greg Kroah-Hartman Cc: Thomas Gleixner , Arnd Bergmann , Nicolas Ferre , Alexander Dahl , Sebastian Andrzej Siewior , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, Alexandre Belloni Subject: [PATCH 00/12] clocksource: improve Atmel TCB timer driver Date: Wed, 3 Apr 2019 16:11:08 +0200 Message-Id: <20190403141120.32754-1-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org Hi, This series immproves the Atmel TCB clocksource driver to address the most urgent shortcomings: - the current tcb_clksrc driver is probed too late to be able to be used at boot and we now have SoCs that don't have a PIT. They currently are not able to boot an upstream kernel. - using the PIT doesn't work well with preempt-rt because its interrupt is shared (in particular with the UART) and their interrupt flags are incompatible). This also happen with the threadedirq command line switch. - there is currently no high resolution sched_clock. The plan is to get those changes upstream as soon as possible as they arre fixing real issues that people are facing. There are further changes needed on the clocksource driver to try to stop wasting a TCB channel. the PWM TCB driver will also be changed to actually used the reviewed binding and this will allow to get rif of atmel_tclib. Alexandre Belloni (12): ARM: at91: move SoC specific definitions to SoC folder misc: atmel_tclib: drop AVR32 support misc: atmel_tclib: move definitions to header file clocksource/drivers/tcb_clksrc: stop depending on atmel_tclib clocksource/drivers/tcb_clksrc: Use tcb as sched_clock ARM: at91: Implement clocksource selection clocksource/drivers/tcb_clksrc: move Kconfig option clocksource/drivers/timer-atmel-pit: rework Kconfig option clocksource/drivers/tcb_clksrc: Rename the file for consistency ARM: configs: at91: unselect PIT misc: atmel_tclib: do not probe already used TCBs clocksource/drivers/timer-atmel-tcb: Use ARRAY_SIZE instead of hardcoded size arch/arm/configs/at91_dt_defconfig | 1 + arch/arm/configs/sama5_defconfig | 1 + arch/arm/mach-at91/Kconfig | 23 ++++ drivers/clocksource/Kconfig | 12 +- drivers/clocksource/Makefile | 2 +- .../{tcb_clksrc.c => timer-atmel-tcb.c} | 123 ++++++++++++------ drivers/misc/Kconfig | 24 ---- drivers/misc/atmel_tclib.c | 37 +----- drivers/pwm/pwm-atmel-tcb.c | 2 +- .../atmel_tc.h => soc/at91/atmel_tcb.h} | 25 +++- 10 files changed, 146 insertions(+), 104 deletions(-) rename drivers/clocksource/{tcb_clksrc.c => timer-atmel-tcb.c} (81%) rename include/{linux/atmel_tc.h => soc/at91/atmel_tcb.h} (95%)