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=-10.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 0DCBCC433E8 for ; Thu, 23 Jul 2020 14:34:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9DCC20771 for ; Thu, 23 Jul 2020 14:34:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="O0ol5jS6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729089AbgGWOeM (ORCPT ); Thu, 23 Jul 2020 10:34:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728969AbgGWOeK (ORCPT ); Thu, 23 Jul 2020 10:34:10 -0400 Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [IPv6:2a00:1450:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 582CAC0619E3 for ; Thu, 23 Jul 2020 07:34:10 -0700 (PDT) Received: by mail-wm1-x341.google.com with SMTP id c80so5182060wme.0 for ; Thu, 23 Jul 2020 07:34:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=kcqSFG3PZo/UmJ0bcT4TKemDKca3FfDpYWmqtwN5O6Y=; b=O0ol5jS6RjSrVoy1krIq2puUU3bM6YnORPdOjg6oRctJaAo0qeFkeEa0DAB0+6lNZt D/pv8cWPuoVGiMepm5YWOYf6vJ3IJ0Rx7uCD3I6Xx7ZZcO5dba/FU4i+AtVesgCFXHtU XouaNHnN7QkmWfaA1cqpHrJgzcBf3wE12lGni4sIdrz+b04Ooup6OXvgjBHhEzy5cRvD VUbncuhPdoeFml3KmjuFHH0XRWLVBqWRhV8NYbDAy22NGwjvlrlRSeK/m2ANwc+iy8Et ws9ngZxWZUMU/q2/XBOCg7J+COsgjJvmyxc1P8xBMyYJnAYj2ejUe1O4DO+sxNNxyUXg i8DA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=kcqSFG3PZo/UmJ0bcT4TKemDKca3FfDpYWmqtwN5O6Y=; b=LktVBvgmDWdb72wMCLNtvq2icL9Zhy7kk4yrDybPMYbAPk6/hIDEWX7crEyY53ijU1 WTDiwKNijNksEWPfbqJj+BcbB21hFxTSysbTr81i8y+hujBoIbNYsz4Q4G3dYwD9t2fk RR9lIH+zc920RAXY6xItspgzJd5BAcKCoeed4YEJlN5g9lCAtCS7VzclQP/r9DBkSbpb EKE6Us5Q82hzAPI5sGyH6z8fwJkzxw6THxdrh4KZEV9G3z1ajhseP6wmShFyXjcqeMYs ZDsmiTgIUDULl7JoH8u/E3NF3PczaAgMIv/3YrBRYQOtGqrBE8EsdFl0LBCDgRuW7DKz uHoA== X-Gm-Message-State: AOAM5327wwPq7YQmRbEjzE/bh039lrg53dQfwklnQ4tTYkMDxQa1NA5w Jzu2CFvqIwR7tFjbceJr5kcJ3Q== X-Google-Smtp-Source: ABdhPJwghOiyUKMQjbCRRwM97akzde6uqm+99J0U4w+8JSZg9XFrx+PSopfmQeT7hmLALhoXOfiahA== X-Received: by 2002:a1c:5ac3:: with SMTP id o186mr4353780wmb.39.1595514848856; Thu, 23 Jul 2020 07:34:08 -0700 (PDT) Received: from ?IPv6:2a01:e34:ed2f:f020:dca7:8d30:33fa:daac? ([2a01:e34:ed2f:f020:dca7:8d30:33fa:daac]) by smtp.googlemail.com with ESMTPSA id b8sm3980634wrv.4.2020.07.23.07.34.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 23 Jul 2020 07:34:08 -0700 (PDT) Subject: Re: [PATCH v5 2/4] clocksource/drivers: Add CLINT timer driver To: Anup Patel , Palmer Dabbelt , Paul Walmsley , Albert Ou , Rob Herring , Thomas Gleixner Cc: Damien Le Moal , Atish Patra , Alistair Francis , Anup Patel , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Emil Renner Berhing References: <20200723142409.47057-1-anup.patel@wdc.com> <20200723142409.47057-3-anup.patel@wdc.com> From: Daniel Lezcano Message-ID: Date: Thu, 23 Jul 2020 16:34:07 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200723142409.47057-3-anup.patel@wdc.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23/07/2020 16:24, Anup Patel wrote: > We add a separate CLINT timer driver for Linux RISC-V M-mode (i.e. > RISC-V NoMMU kernel). > > The CLINT MMIO device provides three things: > 1. 64bit free running counter register > 2. 64bit per-CPU time compare registers > 3. 32bit per-CPU inter-processor interrupt registers > > Unlike other timer devices, CLINT provides IPI registers along with > timer registers. To use CLINT IPI registers, the CLINT timer driver > provides IPI related callbacks to arch/riscv. > > Signed-off-by: Anup Patel > Tested-by: Emil Renner Berhing > --- Acked-by: Daniel Lezcano -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog