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ARM: imx: always use TWD on IMX6Q

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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 <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>
This commit is contained in:
Sebastian Andrzej Siewior 2016-04-06 17:39:07 +02:00 • committed by Shawn Guo
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