From: fu.wei@linaro.org (fu.wei at linaro.org)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 4/9] clocksource/drivers/arm_arch_timer: use readq to get 64-bit CNTVCT
Date: Wed, 20 Jul 2016 02:17:59 +0800 [thread overview]
Message-ID: <1468952284-28942-5-git-send-email-fu.wei@linaro.org> (raw)
In-Reply-To: <1468952284-28942-1-git-send-email-fu.wei@linaro.org>
From: Fu Wei <fu.wei@linaro.org>
This patch simplify arch_counter_get_cntvct_mem function by
using readq to get 64-bit CNTVCT value instead of readl_relaxed.
Signed-off-by: Fu Wei <fu.wei@linaro.org>
---
drivers/clocksource/arm_arch_timer.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index e6fd42d..483d2f9 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -418,15 +418,7 @@ u32 arch_timer_get_rate(void)
static u64 arch_counter_get_cntvct_mem(void)
{
- u32 vct_lo, vct_hi, tmp_hi;
-
- do {
- vct_hi = readl_relaxed(arch_counter_base + CNTVCT_HI);
- vct_lo = readl_relaxed(arch_counter_base + CNTVCT_LO);
- tmp_hi = readl_relaxed(arch_counter_base + CNTVCT_HI);
- } while (vct_hi != tmp_hi);
-
- return ((u64) vct_hi << 32) | vct_lo;
+ return readq(arch_counter_base + CNTVCT_LO);
}
/*
--
2.5.5
next prev parent reply other threads:[~2016-07-19 18:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 18:17 [PATCH v8 0/9] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer fu.wei at linaro.org
2016-07-19 18:17 ` [PATCH v8 1/9] clocksource/drivers/arm_arch_timer: Move enums and defines to header file fu.wei at linaro.org
2016-07-19 18:17 ` [PATCH v8 2/9] clocksource/drivers/arm_arch_timer: Add a new enum for spi type fu.wei at linaro.org
2016-07-19 18:17 ` [PATCH v8 3/9] clocksource/drivers/arm_arch_timer: Improve printk relevant code fu.wei at linaro.org
2016-07-19 18:17 ` fu.wei at linaro.org [this message]
2016-07-24 20:26 ` [PATCH v8 4/9] clocksource/drivers/arm_arch_timer: use readq to get 64-bit CNTVCT kbuild test robot
2016-07-25 9:02 ` Will Deacon
2016-07-25 15:50 ` Fu Wei
2016-07-25 22:47 ` Russell King - ARM Linux
2016-07-19 18:18 ` [PATCH v8 5/9] acpi/arm64: Add GTDT table parse driver fu.wei at linaro.org
2016-07-21 13:28 ` Rafael J. Wysocki
2016-07-22 17:57 ` Fu Wei
2016-07-19 18:18 ` [PATCH v8 6/9] clocksource/drivers/arm_arch_timer: Simplify ACPI support code fu.wei at linaro.org
2016-07-19 18:18 ` [PATCH v8 7/9] acpi/arm64: Add memory-mapped timer support in GTDT driver fu.wei at linaro.org
2016-07-21 12:40 ` Lorenzo Pieralisi
2016-07-25 16:06 ` Fu Wei
2016-07-19 18:18 ` [PATCH v8 8/9] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer fu.wei at linaro.org
2016-07-19 18:18 ` [PATCH v8 9/9] acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver fu.wei at linaro.org
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