linux-kernel - [PATCH v2 03/14] AT91: PIT: Use DIV_ROUND

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Message-Id: <1404207208-14513-4-git-send-email-maxime.ripard@free-electrons.com>
Date:	Tue,  1 Jul 2014 11:33:16 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	linux@...im.org.za, Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	Boris Brezillon <boris@...e-electrons.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Thomas Petazzoni <thomas@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH v2 03/14] AT91: PIT: Use DIV_ROUND_CLOSEST to compute the cycles

Until now, the pit_cycle computation was dividing the rate by HZ, rounding to
the closest integer, but without using the appropriate macro.

Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
---
 arch/arm/mach-at91/at91sam926x_time.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index fd3170b65fbb..2e6f1a37ab90 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -252,7 +252,7 @@ void __init at91sam926x_pit_init(void)
 	if (IS_ERR(mck))
 		panic("AT91: PIT: Unable to get mck clk\n");
 	pit_rate = clk_get_rate(mck) / 16;
-	pit_cycle = (pit_rate + HZ/2) / HZ;
+	pit_cycle = DIV_ROUND_CLOSEST(pit_rate, HZ);
 	WARN_ON(((pit_cycle - 1) & ~AT91_PIT_PIV) != 0);
 
 	/* Initialize and enable the timer */
-- 
2.0.0

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