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Subject[PATCH v2 3/3] ARM: vf610: Add ARM Global Timer clocksource option
Date
Add the ARM Global Timer as clocksource/scheduler clock option and
use it as default scheduler clock. This leaves the PIT timer for
other users e.g. the secondary Cortex-M4 core. Also, the Global Timer
has double the precission (running at pheripheral clock compared to
IPG clock) and a 64-bit incrementing counter register. We still keep
the PIT timer as an secondary option in case the ARM Global Timer is
not available.

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
arch/arm/mach-imx/Kconfig | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 11b2957..9482f58 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -633,12 +633,29 @@ config SOC_VF610
bool "Vybrid Family VF610 support"
select ARM_GIC
select PINCTRL_VF610
- select VF_PIT_TIMER
select PL310_ERRATA_769419 if CACHE_L2X0

help
This enable support for Freescale Vybrid VF610 processor.

+choice
+ prompt "Clocksource for scheduler clock"
+ depends on SOC_VF610
+ default ARM_GLOBAL_TIMER
+
+ config ARM_GLOBAL_TIMER
+ bool "Use ARM Global Timer"
+ select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+ help
+ Use the ARM Global Timer as clocksource
+
+ config VF_PIT_TIMER
+ bool "Use PIT timer"
+ help
+ Use SoC Periodic Interrupt Timer (PIT) as clocksource
+
+endchoice
+
endif

source "arch/arm/mach-imx/devices/Kconfig"
--
2.1.0


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