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authorStefan Agner <stefan@agner.ch>2014-09-24 18:20:10 +0200
committerShawn Guo <shawn.guo@linaro.org>2014-11-23 14:56:18 +0800
commit2a61cba71fba5b73b11e0de665869a6ee619af0e (patch)
treee37f576747d1b2449e4d0b9049f4d42aa0443bc3 /arch/arm/mach-imx/Kconfig
parentbc4abc3e5f40edc43e54da41b7acf8222e9cb888 (diff)
ARM: vf610: Add ARM Global Timer clocksource option
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> Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com> Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Diffstat (limited to 'arch/arm/mach-imx/Kconfig')
-rw-r--r--arch/arm/mach-imx/Kconfig21
1 files changed, 20 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 11b2957f792b..e26b0fdd72db 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -633,12 +633,31 @@ 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 VF_USE_ARM_GLOBAL_TIMER
+
+ config VF_USE_ARM_GLOBAL_TIMER
+ bool "Use ARM Global Timer"
+ select ARM_GLOBAL_TIMER
+ select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+ help
+ Use the ARM Global Timer as clocksource
+
+ config VF_USE_PIT_TIMER
+ bool "Use PIT timer"
+ select VF_PIT_TIMER
+ help
+ Use SoC Periodic Interrupt Timer (PIT) as clocksource
+
+endchoice
+
endif
source "arch/arm/mach-imx/devices/Kconfig"