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=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,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 299E2ECDFB1 for ; Tue, 17 Jul 2018 07:56:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D808020877 for ; Tue, 17 Jul 2018 07:56:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="DbKTt1Sf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D808020877 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.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 S1729633AbeGQI1W (ORCPT ); Tue, 17 Jul 2018 04:27:22 -0400 Received: from mail-pl0-f65.google.com ([209.85.160.65]:36824 "EHLO mail-pl0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728304AbeGQI1V (ORCPT ); Tue, 17 Jul 2018 04:27:21 -0400 Received: by mail-pl0-f65.google.com with SMTP id e11-v6so107076plb.3 for ; Tue, 17 Jul 2018 00:56:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=fGURDGdl/JLCtBIrVGtFaqQO0dTy+oPsnkiP/5Ymcxo=; b=DbKTt1SfiQN/3EpERHDZ86Yc05unP7Hnp69x23v3efs8lIun+IzKxeNiWx3lTxrni3 vzMki2TYjsj72oWCUQKrfFDi4XJsrD1JevlEzZLR3EYbpUMGzZj4hs7ZF6qgYd1vGn7s TRzd0ij5/vBxzXktchBjrA7lWd07v4B2wnyEs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=fGURDGdl/JLCtBIrVGtFaqQO0dTy+oPsnkiP/5Ymcxo=; b=ZEqTh0YO97QMIKn+ICWQ7sIojQ49NVkojS7T1kk2HFJF6CC+ofKgRwWsCz6uY8Vz/p PCTI+aK1NA0dGdK5JPlyAW8LsmCb0Cr6oUWDZXiSwm5kOVQrMHttx6bGy1xy3BVpO2gF TTpBQhL451pu93lm9XnuW3d8iWMWOcBXKx7d27J4EZHLo1O7qIXn7nPSAncVtQH2+zJS Ouq7ng7Rz9RJu1J8EGZ78uyA61aGFvXE+TNyIsiVCtSW8djjimbCTHR4bWVXUmwznW4d 0Xyy7WC+Lkie8rVckHV0o81w/XEfGCJvR577lV3zSKkeEBMVTX4Cdx1Ew1Ka0fSZ+DxB wZSg== X-Gm-Message-State: AOUpUlF6zBs7mKl9cdG8tgovXgRgQ7xy/b935dyWUL3+Ze8mHVGR2/Kl 0fpNEtA8vwotrFljvz6cnptj3buWLlE= X-Google-Smtp-Source: AAOMgpf2KVVEZi9ncV6SuY86SS7gyv4qvGdk6+SsC8HAoQ+D+prhG5s5r9HACkiADOGNuiJGRf6a+w== X-Received: by 2002:a17:902:201:: with SMTP id 1-v6mr594972plc.310.1531814161788; Tue, 17 Jul 2018 00:56:01 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id j75-v6sm1462012pfj.102.2018.07.17.00.55.59 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 17 Jul 2018 00:56:01 -0700 (PDT) From: Baolin Wang To: tglx@linutronix.de, john.stultz@linaro.org, sboyd@kernel.org, arnd@arndb.de, broonie@kernel.org, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org, baolin.wang@linaro.org Subject: [PATCH 2/2] clocksource: sprd: Register one always-on timer to compensate suspend time Date: Tue, 17 Jul 2018 15:55:17 +0800 Message-Id: <3d6de641eabb8f36ad2b6d4e948bfdeb2282c96a.1531812082.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since the clocksource framework has introduced one suspend clocksource to compensate the suspend time, this patch registers one always-on timer as the suspend clocksource. Signed-off-by: Baolin Wang --- Changes from RFC v1: - None. --- drivers/clocksource/timer-sprd.c | 50 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/clocksource/timer-sprd.c b/drivers/clocksource/timer-sprd.c index ef9ebea..430cb99 100644 --- a/drivers/clocksource/timer-sprd.c +++ b/drivers/clocksource/timer-sprd.c @@ -156,4 +156,54 @@ static int __init sprd_timer_init(struct device_node *np) return 0; } +static struct timer_of suspend_to = { + .flags = TIMER_OF_BASE | TIMER_OF_CLOCK, +}; + +static u64 sprd_suspend_timer_read(struct clocksource *cs) +{ + return ~(u64)readl_relaxed(timer_of_base(&suspend_to) + + TIMER_VALUE_SHDW_LO) & cs->mask; +} + +static int sprd_suspend_timer_enable(struct clocksource *cs) +{ + sprd_timer_update_counter(timer_of_base(&suspend_to), + TIMER_VALUE_LO_MASK); + sprd_timer_enable(timer_of_base(&suspend_to), TIMER_CTL_PERIOD_MODE); + + return 0; +} + +static void sprd_suspend_timer_disable(struct clocksource *cs) +{ + sprd_timer_disable(timer_of_base(&suspend_to)); +} + +static struct clocksource suspend_clocksource = { + .name = "sprd_suspend_timer", + .rating = 200, + .read = sprd_suspend_timer_read, + .enable = sprd_suspend_timer_enable, + .disable = sprd_suspend_timer_disable, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP, +}; + +static int __init sprd_suspend_timer_init(struct device_node *np) +{ + int ret; + + ret = timer_of_init(np, &suspend_to); + if (ret) + return ret; + + clocksource_register_hz(&suspend_clocksource, + timer_of_rate(&suspend_to)); + + return 0; +} + TIMER_OF_DECLARE(sc9860_timer, "sprd,sc9860-timer", sprd_timer_init); +TIMER_OF_DECLARE(sc9860_persistent_timer, "sprd,sc9860-suspend-timer", + sprd_suspend_timer_init); -- 1.7.9.5