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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 5FD04C6778D for ; Wed, 12 Sep 2018 16:11:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1FF1A20880 for ; Wed, 12 Sep 2018 16:11:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1FF1A20880 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728154AbeILVQi (ORCPT ); Wed, 12 Sep 2018 17:16:38 -0400 Received: from mail.bootlin.com ([62.4.15.54]:60128 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727943AbeILVQi (ORCPT ); Wed, 12 Sep 2018 17:16:38 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 9E843207A8; Wed, 12 Sep 2018 18:11:24 +0200 (CEST) Received: from localhost (242.171.71.37.rev.sfr.net [37.71.171.242]) by mail.bootlin.com (Postfix) with ESMTPSA id 793A52071D; Wed, 12 Sep 2018 18:11:24 +0200 (CEST) From: Alexandre Belloni To: Daniel Lezcano Cc: Thomas Gleixner , Nicolas Ferre , Alexander Dahl , Sebastian Andrzej Siewior , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alexandre Belloni Subject: [PATCH v6 0/7] clocksource: rework Atmel TCB timer driver Date: Wed, 12 Sep 2018 18:11:15 +0200 Message-Id: <20180912161122.7717-1-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.19.0.rc2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This series reworks the Atmel TCB drivers. It introduces a new driver to handle the clocksource and clockevent devices. As a reminder, this is necessary because: - 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 a mainline 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) - the current solution is wasting some TCB channels The plan is to get this driver upstream, then convert the TCB PWM driver to be able to get rid of the tcb_clksrc driver along with atmel_tclib now that AVR32 is gone. changes in v6: - rebased on v4.19-rc1 - separated the clocksource/clockevent and the single clockevent in two different patches - removed struct tc_clkevt_device and simply use struct atmel_tcb_clksrc - removed struct atmel_tcb_info - moved tcb_clk_get and tcb_irq_get to users changes in v5: - rebased on v4.18-rc1 - fixed the clock enabling/disabling in atomic context under preempt-rt Changes in v4: - rebased on top of v4.17-rc1 - fixed an issue when setting max_delta for clockevents_config_and_register Alexandre Belloni (7): ARM: at91: add TCB registers definitions clocksource/drivers: Add a new driver for the Atmel ARM TC blocks clocksource/drivers: timer-atmel-tcb: add clockevent device on separate channel clocksource/drivers: atmel-pit: make option silent ARM: at91: Implement clocksource selection ARM: configs: at91: use new TCB timer driver ARM: configs: at91: unselect PIT arch/arm/configs/at91_dt_defconfig | 2 +- arch/arm/configs/sama5_defconfig | 2 +- arch/arm/mach-at91/Kconfig | 25 ++ drivers/clocksource/Kconfig | 13 +- drivers/clocksource/Makefile | 3 +- drivers/clocksource/timer-atmel-tcb.c | 616 ++++++++++++++++++++++++++ include/soc/at91/atmel_tcb.h | 183 ++++++++ 7 files changed, 840 insertions(+), 4 deletions(-) create mode 100644 drivers/clocksource/timer-atmel-tcb.c create mode 100644 include/soc/at91/atmel_tcb.h -- 2.19.0.rc2