From mboxrd@z Thu Jan 1 00:00:00 1970 From: stefan@agner.ch (Stefan Agner) Date: Wed, 24 Sep 2014 18:20:10 +0200 Subject: [PATCH v2 3/3] ARM: vf610: Add ARM Global Timer clocksource option In-Reply-To: <1411575610-20895-1-git-send-email-stefan@agner.ch> References: <1411575610-20895-1-git-send-email-stefan@agner.ch> Message-ID: <1411575610-20895-4-git-send-email-stefan@agner.ch> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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