linux-kernel - [PATCH] clocksource: arch_arm_timer: Fix timecounter initialization

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Date:	Wed, 11 Jun 2014 16:37:41 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<daniel.lezcano@...aro.org>, <tglx@...utronix.de>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	<linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH] clocksource: arch_arm_timer: Fix timecounter initialization

The third parameter(u64 start_tstamp) of timecounter_init() should
be the start time by ns, not a cycle counter.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
---
 drivers/clocksource/arm_arch_timer.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 5163ec1..6c3cfd8 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -426,7 +426,7 @@ struct timecounter *arch_timer_get_timecounter(void)
 
 static void __init arch_counter_register(unsigned type)
 {
-	u64 start_count;
+	u64 start_count, start_ns;
 
 	/* Register the CP15 based counter if we have one */
 	if (type & ARCH_CP15_TIMER)
@@ -438,7 +438,8 @@ static void __init arch_counter_register(unsigned type)
 	clocksource_register_hz(&clocksource_counter, arch_timer_rate);
 	cyclecounter.mult = clocksource_counter.mult;
 	cyclecounter.shift = clocksource_counter.shift;
-	timecounter_init(&timecounter, &cyclecounter, start_count);
+	start_ns = cyclecounter_cyc2ns(&cyclecounter, start_count);
+	timecounter_init(&timecounter, &cyclecounter, start_ns);
 
 	/* 56 bits minimum, so we assume worst case rollover */
 	sched_clock_register(arch_timer_read_counter, 56, arch_timer_rate);
-- 
1.8.5

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