linux-kernel - [PATCH 4/5] Clocksource: Flextimer: Fix counter clock prescaler calculation.

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Date:	Tue, 26 Aug 2014 13:45:50 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<daniel.lezcano@...aro.org>, <tglx@...utronix.de>
CC:	<dongsheng.wang@...escale.com>, <linux-kernel@...r.kernel.org>,
	Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH 4/5] Clocksource: Flextimer: Fix counter clock prescaler calculation.

We should minus one after calculating the counter input clock's
prescaler.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
Signed-off-by: Jingchang Lu <jingchang.lu@...escale.com>
---
 drivers/clocksource/fsl_ftm_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/fsl_ftm_timer.c b/drivers/clocksource/fsl_ftm_timer.c
index f70fcf2..974890e 100644
--- a/drivers/clocksource/fsl_ftm_timer.c
+++ b/drivers/clocksource/fsl_ftm_timer.c
@@ -311,7 +311,7 @@ static int __init ftm_calc_closest_round_cyc(unsigned long freq)
 						HZ * (1 << priv->ps++));
 	} while (priv->periodic_cyc > 0xFFFF);
 
-	if (priv->ps > FTM_PS_MAX) {
+	if (--priv->ps > FTM_PS_MAX) {
 		pr_err("ftm: the prescaler is %lu > %d\n",
 				priv->ps, FTM_PS_MAX);
 		return -EINVAL;
-- 
1.8.5

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