Commit 2a61cba7 authored by Stefan Agner's avatar Stefan Agner Committed by Shawn Guo
Browse files

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: default avatarStefan Agner <stefan@agner.ch>
Acked-by: default avatarBill Pringlemeir <bpringlemeir@nbsps.com>
Signed-off-by: default avatarShawn Guo <shawn.guo@freescale.com>
parent bc4abc3e

arch/arm/mach-imx/Kconfig

+20 −1
Original line number Diff line number Diff line
@@ -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"

CRA Git | Maintained and supported by SUSTech CRA and CCSE