From: Soren Brinkmann <soren.brinkmann@xilinx.com>
To: Rob Herring <rob.herring@calxeda.com>,
Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Russell King <linux@arm.linux.org.uk>,
Michal Simek <michal.simek@xilinx.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Soren Brinkmann <soren.brinkmann@xilinx.com>
Subject: [PATCH v2 8/9] arm: zynq: Don't use arm_global_timer with cpufreq
Date: Tue, 26 Nov 2013 17:04:55 -0800 [thread overview]
Message-ID: <1385514296-26702-9-git-send-email-soren.brinkmann@xilinx.com> (raw)
In-Reply-To: <1385514296-26702-1-git-send-email-soren.brinkmann@xilinx.com>
The timer frequency of the arm_global_timer depends on the CPU
frequency. With cpufreq altering that frequency the arm_global_timer
does not maintain a stable time base. Therefore don't enable that timer
in case cpufreq is enabled.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
arch/arm/mach-zynq/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 6b04260aa142..f84fab14f0b7 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -13,6 +13,6 @@ config ARCH_ZYNQ
select HAVE_SMP
select SPARSE_IRQ
select CADENCE_TTC_TIMER
- select ARM_GLOBAL_TIMER
+ select ARM_GLOBAL_TIMER if !CPU_FREQ
help
Support for Xilinx Zynq ARM Cortex A9 Platform
--
1.8.4.4
next prev parent reply other threads:[~2013-11-27 1:06 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-27 1:04 [PATCH v2 0/9] arm: zynq: Add support for cpufreq Soren Brinkmann
2013-11-27 1:04 ` [PATCH v2 1/9] arm: dt: zynq: Remove 'clock-ranges' from TTC nodes Soren Brinkmann
2013-12-12 8:53 ` Michal Simek
2013-12-12 17:01 ` Sören Brinkmann
2013-12-12 19:07 ` Michal Simek
2013-11-27 1:04 ` [PATCH v2 2/9] arm: dt: zynq: Add 'cpus' node Soren Brinkmann
2013-11-27 1:04 ` [PATCH v2 3/9] clocksource/cadence_ttc: Store timer frequency in driver data Soren Brinkmann
2013-12-17 19:21 ` Sören Brinkmann
2013-12-18 14:53 ` Daniel Lezcano
2013-12-18 16:47 ` Sören Brinkmann
2013-12-18 21:58 ` Daniel Lezcano
2013-12-19 18:32 ` Sören Brinkmann
2013-12-19 20:53 ` Daniel Lezcano
2013-12-19 21:23 ` Sören Brinkmann
2013-12-19 21:39 ` Daniel Lezcano
2013-11-27 1:04 ` [PATCH v2 4/9] clocksource/cadence_ttc: Use enable/disable_irq Soren Brinkmann
2013-11-28 11:55 ` Daniel Lezcano
2013-11-28 14:18 ` Thomas Gleixner
2013-11-28 18:36 ` Sören Brinkmann
2013-11-28 19:07 ` Thomas Gleixner
2013-12-06 22:47 ` Sören Brinkmann
2013-12-07 10:56 ` Thomas Gleixner
2013-12-10 0:34 ` [PATCH 0/2] clockevents Soren Brinkmann
2013-12-10 0:34 ` [PATCH 1/2] time: Serialize calls to 'clockevents_update_freq' in the timing core Soren Brinkmann
2013-12-11 14:32 ` Daniel Lezcano
2013-12-11 20:09 ` Sören Brinkmann
2013-12-12 12:07 ` Daniel Lezcano
2013-12-10 0:34 ` [PATCH 2/2] time: clockevents: Adjust timer interval when frequency changes Soren Brinkmann
2013-11-27 1:04 ` [PATCH v2 5/9] clocksource/cadence_ttc: Adjust interval in clock notifier Soren Brinkmann
2013-12-12 12:15 ` Daniel Lezcano
2013-12-12 18:44 ` Sören Brinkmann
2013-11-27 1:04 ` [PATCH v2 6/9] clocksource/cadence_ttc: Overhaul clocksource frequency adjustment Soren Brinkmann
2013-11-27 1:04 ` [PATCH v2 7/9] clocksource/cadence_ttc: Use only one counter Soren Brinkmann
2013-11-27 1:04 ` Soren Brinkmann [this message]
2013-11-27 1:04 ` [PATCH v2 9/9] arm: zynq: Add support for cpufreq Soren Brinkmann
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