From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1526288221; cv=none; d=google.com; s=arc-20160816; b=KZUV8SLj3sKh7xVigvzEQ02MSxsJEZFoTBZwqcOdLFKdRSZQhzsVnvIPX4NLQIp3wF uBfCeb095OFbpEva6PgTSONMUI2KEjNeQk5AEaodwm1jZHmJvLermma83BK7NCOeAJ7/ 9qEOkibVo97WRzVpZ+OOoRAFn+vDvNytktCIwyCjy2bM2fb9cE38gQymd8EbfhSh8N5y mvFcYPd7QGtTfQWJYzF+Kow0fEmyDP9zTxllXDfugUM2AJISUMa1GS/TPSTAPWgt7Z9L x2Ok7RmZd9YEvapKzkli2FRc/bbNKewtSVZ2hcM2QUy+2h8zp65nbDZgQjHDk9+49/a3 gNNg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=JFxtoPTIwMJxvyCd3hwanD0Gfpl/C9hHnauJqDpF+Pw=; b=ahJ5j6Lw4nFZQm5G2Q378iBR/wkppMRZKA0+CUIh5l6NRdLW0Wp5442u+w2BXpMWbE ZFVJxaKxFe11qKh/9T/X6tkJCIbjWqPpwXKPMFLTbAk3hT4ChUnp9U3ImL318SpMuUd2 swfxu0HcnFoDrzWQOvO6O2Q7GiBkmbQPzLMAT/LvLNkhkujDmG1K9qnWfWN8m6erVyLl Z7DRCHhVadDBlHaA+JvcQ8jnTIueev0x4ty9imlaFaxuTff2Lkc9dxpa7deeXbOVwf/9 pmWlz2r3lAEnLJrz1CNadCaFrhKXH+vmDZfs1Q2bRv3XmFah764K6f8CBfndlYo6fINE YhYA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Lks8eZND; spf=pass (google.com: domain of baolin.wang@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=baolin.wang@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Lks8eZND; spf=pass (google.com: domain of baolin.wang@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=baolin.wang@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org X-Google-Smtp-Source: AB8JxZqJqrkpqUjChhz+cXXKxmxgAaOH1itX8BY6d+zuE+pHfRQUCNQWxrJ6eLWAz63O4iru9mMMTA== From: Baolin Wang To: tglx@linutronix.de, john.stultz@linaro.org, daniel.lezcano@linaro.org, arnd@arndb.de, tony@atomide.com, aaro.koskinen@iki.fi, linux@armlinux.org.uk, mark.rutland@arm.com, marc.zyngier@arm.com Cc: baolin.wang@linaro.org, broonie@kernel.org, paulmck@linux.vnet.ibm.com, mlichvar@redhat.com, rdunlap@infradead.org, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, pombredanne@nexb.com, thierry.reding@gmail.com, jonathanh@nvidia.com, heiko@sntech.de, linus.walleij@linaro.org, viresh.kumar@linaro.org, mingo@kernel.org, hpa@zytor.com, peterz@infradead.org, douly.fnst@cn.fujitsu.com, len.brown@intel.com, rajvi.jingar@intel.com, alexandre.belloni@bootlin.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org Subject: [RFC PATCH 06/10] clocksource: arm_arch_timer: Register the persistent clock Date: Mon, 14 May 2018 16:55:32 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1600429198447922047?= X-GMAIL-MSGID: =?utf-8?q?1600429198447922047?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Register the persistent clock to compensate the suspend time for OS time, if the ARM counter clocksource will not be stopped in suspend state. Signed-off-by: Baolin Wang --- drivers/clocksource/Kconfig | 1 + drivers/clocksource/arm_arch_timer.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index d7dddcc..884719c 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -308,6 +308,7 @@ config ARC_TIMERS_64BIT config ARM_ARCH_TIMER bool + select PERSISTENT_CLOCK select TIMER_OF if OF select TIMER_ACPI if ACPI diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 57cb2f0..671be63 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -32,6 +32,7 @@ #include #include +#include #undef pr_fmt #define pr_fmt(fmt) "arch_timer: " fmt @@ -950,6 +951,15 @@ static void __init arch_counter_register(unsigned type) /* 56 bits minimum, so we assume worst case rollover */ sched_clock_register(arch_timer_read_counter, 56, arch_timer_rate); + + /* + * Register the persistent clock if the clocksource will not be stopped + * in suspend state. + */ + if (!arch_counter_suspend_stop) + persistent_clock_init_and_register(arch_timer_read_counter, + CLOCKSOURCE_MASK(56), + arch_timer_rate, 0); } static void arch_timer_stop(struct clock_event_device *clk) -- 1.7.9.5