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[15/17] arm: zynq: Don't use arm_global_timer with cpufreq

Message ID 1394577653-8615-15-git-send-email-daniel.lezcano@linaro.org
State Accepted
Commit 61f1fc7e9258a169ac8afb5ddf657a181e60d052
Headers show

Commit Message

Daniel Lezcano March 11, 2014, 10:40 p.m. UTC 
From: Soren Brinkmann <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.

Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Michal Simek <michal.simek@xilinx.com>
---
 arch/arm/mach-zynq/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 6b04260..f84fab1 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