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ARM: imx: always use TWD on IMX6Q 

There is no reason to limit the TWD to be used on SMP kernels only if the
hardware has it available.
On Wandboard i.MX6SOLO, running PREEMPT-RT and cyclictest I see as max
immediately after start in idle:
UP : ~90us
SMP: ~50us
UP + TWD: ~20us.
Based on this numbers I prefer the TWD over the slightly slower MXC
timer.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
hifive-unleashed-5.1
Sebastian Andrzej Siewior 2016-04-06 17:39:07 +02:00 committed by Shawn Guo
parent f55532a0c0
commit acc98009b8
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mach-imx/Kconfig
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@ -526,7 +526,7 @@ config SOC_IMX6Q
bool "i.MX6 Quad/DualLite support"
select ARM_ERRATA_764369 if SMP
select HAVE_ARM_SCU if SMP
select HAVE_ARM_TWD if SMP
select HAVE_ARM_TWD
select PCI_DOMAINS if PCI
select PINCTRL_IMX6Q
select SOC_IMX6