linux-kernel - [PATCH 15/17] arm: zynq: Don't use arm_global

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Message-Id: <1394577653-8615-15-git-send-email-daniel.lezcano@linaro.org>
Date:	Tue, 11 Mar 2014 23:40:51 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	tglx@...utronix.de, mingo@...nel.org
Cc:	linux-kernel@...r.kernel.org, dan.carpenter@...cle.com,
	ezequiel.garcia@...e-electrons.com, ivan.khoronzhuk@...com,
	linus.walleij@...aro.org, magnus.damm@...il.com,
	matthias.bgg@...il.com, soren.brinkmann@...inx.com,
	sboyd@...eaurora.org
Subject: [PATCH 15/17] arm: zynq: Don't use arm_global_timer with cpufreq

From: Soren Brinkmann <soren.brinkmann@...inx.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@....linux.org.uk>
Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Acked-by: Michal Simek <michal.simek@...inx.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 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
-- 
1.7.9.5

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