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[209.132.180.67]) by mx.google.com with ESMTP id r1-v6si21330722plb.172.2018.07.12.01.45.06; Thu, 12 Jul 2018 01:45:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=KZfe0jvv; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732341AbeGLIxk (ORCPT + 28 others); Thu, 12 Jul 2018 04:53:40 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:34923 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726393AbeGLIxj (ORCPT ); Thu, 12 Jul 2018 04:53:39 -0400 Received: by mail-pf0-f196.google.com with SMTP id q7-v6so19089017pff.2 for ; Thu, 12 Jul 2018 01:45:03 -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=7IO3qfA2g2fabXqH25n3LDrGVQAknfMl75vi9SRb11A=; b=KZfe0jvvXty2GG8LXIKc32hsXEFJFQwUFWQykXM7YHeuqU7Ad1bu3g6bV4YyivQJPJ T60QXemlq5tzKsEZ1F1aawwEdlArITP4t0V8AWNgK6ErIDfD8wKe1iorFdBSU9PzXkVI yvZS+vO2pGwW+/Ce162krUyK53dzzZuDroh+Q= 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=7IO3qfA2g2fabXqH25n3LDrGVQAknfMl75vi9SRb11A=; b=Z/veEstKKETWAdD4/iU/E4Xp1MfHaCFOGRe/Dw1DL03wML8wZRALZKpP3W2Tf+3VGi IKGc6bsD9PygkDL3ZUyE8w/qq6eY1MBeqwZBlAG4Fqpie/wpfprHx52igfS9QxPjeYLu +ZPQJJFcSV6ng3rz2nib0lW34PqSNqj2QP0b3hW2g84aozHBiP/yN6d68akC7W6OSr9A 5WwVwajIbCyd1j+dhShJMNB6O1B7Hu7x1e8YtIBziM3dnRpsYWl+Auy/++zNPFfMVBKN mx3TxlfaXo3NXrvmx4Q4UgwedmLF+6BWP9Umx4TiEsRqlVVjR0Hy9KYEIUGdgdqA73zp onDQ== X-Gm-Message-State: AOUpUlG+bdD027dVTBkOokSCPISVqqyko3fof+WiDt7WPBVTYl161HtK 5vZkPk7cPkwuTfFFiyhZHlIVHkXSlQM= X-Received: by 2002:a62:e813:: with SMTP id c19-v6mr1418186pfi.124.1531385103205; Thu, 12 Jul 2018 01:45:03 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id v17-v6sm27184314pfn.177.2018.07.12.01.45.00 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 12 Jul 2018 01:45:02 -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: [RFC PATCH 2/2] clocksource: sprd: Register one always-on timer to compensate suspend time Date: Thu, 12 Jul 2018 16:44:13 +0800 Message-Id: <9f6309ba7e9c49d1f887f276471716d07a7f7bba.1531384486.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <4aa9a65166f7e10984bfcff59e72d86e37c369a1.1531384486.git.baolin.wang@linaro.org> References: <4aa9a65166f7e10984bfcff59e72d86e37c369a1.1531384486.git.baolin.wang@linaro.org> In-Reply-To: <4aa9a65166f7e10984bfcff59e72d86e37c369a1.1531384486.git.baolin.wang@linaro.org> References: <4aa9a65166f7e10984bfcff59e72d86e37c369a1.1531384486.git.baolin.wang@linaro.org> 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 --- drivers/clocksource/timer-sprd.c | 50 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) -- 1.7.9.5 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);