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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 806A3C28D1F for ; Tue, 19 Jun 2018 21:19:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3928B20693 for ; Tue, 19 Jun 2018 21:19:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3928B20693 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 S1757364AbeFSVTf (ORCPT ); Tue, 19 Jun 2018 17:19:35 -0400 Received: from mail.bootlin.com ([62.4.15.54]:60629 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755430AbeFSVTc (ORCPT ); Tue, 19 Jun 2018 17:19:32 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id A780420702; Tue, 19 Jun 2018 23:19:30 +0200 (CEST) Received: from localhost (unknown [88.191.26.124]) by mail.bootlin.com (Postfix) with ESMTPSA id 823A1203B0; Tue, 19 Jun 2018 23:19:30 +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 v5 0/6] clocksource: rework Atmel TCB timer driver Date: Tue, 19 Jun 2018 23:19:23 +0200 Message-Id: <20180619211929.22908-1-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.17.1 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 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 (6): ARM: at91: add TCB registers definitions clocksource/drivers: Add a new driver for the Atmel ARM TC blocks 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 | 630 ++++++++++++++++++++++++++ include/soc/at91/atmel_tcb.h | 216 +++++++++ 7 files changed, 887 insertions(+), 4 deletions(-) create mode 100644 drivers/clocksource/timer-atmel-tcb.c create mode 100644 include/soc/at91/atmel_tcb.h -- 2.17.1