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=-4.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 31DD6C04EBD for ; Tue, 16 Oct 2018 13:12:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E85BC2089E for ; Tue, 16 Oct 2018 13:12:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="sVi/sf3w" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E85BC2089E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S1727105AbeJPVCb (ORCPT ); Tue, 16 Oct 2018 17:02:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:55978 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726760AbeJPVCb (ORCPT ); Tue, 16 Oct 2018 17:02:31 -0400 Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BDF652098A; Tue, 16 Oct 2018 13:12:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1539695525; bh=mRr3Du5wYidjIGWzBb7K4pq2qrfimezFcNktr7loIH0=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=sVi/sf3wFnkO0CvOgw37uFDjQi0kuCy9wrBkOvXj5Yvt2d8V+sCioxLbTl+pjuQCu rC6HxDxVzS1kIuEm2xP7mSM3arsA+BGTpicN9LuKIVOnsNasQCgAUE/V20o4wCFUej tNy5qjVu5L/5KUgrGQB+zMjSOfTixkc2a5gAbubw= Received: by mail-wm1-f52.google.com with SMTP id 189-v6so22378767wmw.2; Tue, 16 Oct 2018 06:12:04 -0700 (PDT) X-Gm-Message-State: ABuFfojSW/GNeeayQebcXCs+OAirewuFEBEjqoNxPwHJgrjPuQHl2361 qqtCHPyRr3ziPIKGDvmRjePMuSlCv9t4OVlntDA= X-Google-Smtp-Source: ACcGV60V9wz9ew8OwMle7bs9N2XsguFv/2RTNNFcG1OfCCQlc1tJ9+zd5Mt+WeYm9zpcRpzNUKsEaG/I24xSOJN9nAU= X-Received: by 2002:a1c:9609:: with SMTP id y9-v6mr16189333wmd.67.1539695523195; Tue, 16 Oct 2018 06:12:03 -0700 (PDT) MIME-Version: 1.0 References: <20181015123112.9379-1-m.szyprowski@samsung.com> <20181015123112.9379-4-m.szyprowski@samsung.com> In-Reply-To: <20181015123112.9379-4-m.szyprowski@samsung.com> From: Krzysztof Kozlowski Date: Tue, 16 Oct 2018 15:11:52 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 3/6] clocksource: exynos_mct: Add arch_timer cooperation mode for ARM64 To: Marek Szyprowski Cc: "linux-samsung-soc@vger.kernel.org" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will.deacon@arm.com, catalin.marinas@arm.com, marc.zyngier@arm.com, tglx@linutronix.de, daniel.lezcano@linaro.org, Chanwoo Choi , =?UTF-8?B?QmFydMWCb21pZWogxbtvxYJuaWVya2lld2ljeg==?= , Inki Dae Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 15 Oct 2018 at 14:31, Marek Szyprowski wrote: > > To get ARM Architected Timers working on Samsung Exynos SoCs, one has to > first configure and enable Exynos Multi-Core Timer, because they both > share some common hardware blocks. This patch adds a mode of cooperation > with arch_timer driver, so kernel can use CP15 based timer interface via > arch_timer driver, which is mandatory on ARM64. In such mode driver only > configures MCT registers and starts the timer but don't register any > clocksource or events in the system. Those are left to be handled by > arch_timer driver. > > Signed-off-by: Marek Szyprowski > --- > drivers/clocksource/exynos_mct.c | 52 +++++++++++++++++++++----------- > 1 file changed, 35 insertions(+), 17 deletions(-) Reviewed-by: Krzysztof Kozlowski Best regards, Krzysztof