From: shawn.guo@linaro.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/4] ARM: imx: allow timer counter to roll over
Date: Tue, 4 Dec 2012 22:55:12 +0800 [thread overview]
Message-ID: <1354632915-27134-2-git-send-email-shawn.guo@linaro.org> (raw)
In-Reply-To: <1354632915-27134-1-git-send-email-shawn.guo@linaro.org>
The timer is configured in free-run mode. The counter should be
allowed to roll over to 0 when reaching 0xffffffff. Let's do that
by always returning 0 in set_next_event.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
arch/arm/mach-imx/time.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
index f017302..858098c 100644
--- a/arch/arm/mach-imx/time.c
+++ b/arch/arm/mach-imx/time.c
@@ -139,8 +139,7 @@ static int mx1_2_set_next_event(unsigned long evt,
__raw_writel(tcmp, timer_base + MX1_2_TCMP);
- return (int)(tcmp - __raw_readl(timer_base + MX1_2_TCN)) < 0 ?
- -ETIME : 0;
+ return 0;
}
static int v2_set_next_event(unsigned long evt,
@@ -152,8 +151,7 @@ static int v2_set_next_event(unsigned long evt,
__raw_writel(tcmp, timer_base + V2_TCMP);
- return (int)(tcmp - __raw_readl(timer_base + V2_TCN)) < 0 ?
- -ETIME : 0;
+ return 0;
}
#ifdef DEBUG
--
1.7.9.5
next prev parent reply other threads:[~2012-12-04 14:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-04 14:55 [PATCH v2 0/4] Support imx6q WAIT mode Shawn Guo
2012-12-04 14:55 ` Shawn Guo [this message]
2012-12-04 15:44 ` [PATCH v2 1/4] ARM: imx: allow timer counter to roll over Russell King - ARM Linux
2012-12-05 12:14 ` Shawn Guo
2012-12-05 12:09 ` Russell King - ARM Linux
2012-12-06 9:34 ` Shawn Guo
2012-12-06 14:54 ` [PATCH v3 1/4] ARM: imx: return zero in case next event gets a large increment Shawn Guo
2012-12-04 14:55 ` [PATCH v2 2/4] ARM: imx: mask gpc interrupts initially Shawn Guo
2012-12-04 14:55 ` [PATCH v2 3/4] ARM: imx: move imx6q_cpuidle_driver into a separate file Shawn Guo
2012-12-04 14:55 ` [PATCH v2 4/4] ARM: imx6q: support WAIT mode using cpuidle Shawn Guo
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