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| author | Mattias Wallin <mattias.wallin@stericsson.com> | 2011-05-27 10:29:25 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2011-09-22 15:42:33 +0200 |
| commit | cba13830d3fcb1e025e224c496a10515a39a7f80 (patch) | |
| tree | 57598cebc2aeba64659f0d2b5fcab42e69624787 /arch/arm/plat-nomadik | |
| parent | d93dc5c4478c1fd5de85a3e8aece9aad7bbae044 (diff) | |
| download | kernel_samsung_smdk4412-cba13830d3fcb1e025e224c496a10515a39a7f80.zip kernel_samsung_smdk4412-cba13830d3fcb1e025e224c496a10515a39a7f80.tar.gz kernel_samsung_smdk4412-cba13830d3fcb1e025e224c496a10515a39a7f80.tar.bz2 | |
ARM: plat-nomadik: MTU sched_clock as an option
This patch makes it possible to configure away the sched_clock
part of the MTU timer.
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/plat-nomadik')
| -rw-r--r-- | arch/arm/plat-nomadik/Kconfig | 8 | ||||
| -rw-r--r-- | arch/arm/plat-nomadik/timer.c | 8 |
2 files changed, 11 insertions, 5 deletions
diff --git a/arch/arm/plat-nomadik/Kconfig b/arch/arm/plat-nomadik/Kconfig index ce65901..bca4914 100644 --- a/arch/arm/plat-nomadik/Kconfig +++ b/arch/arm/plat-nomadik/Kconfig @@ -15,10 +15,16 @@ if PLAT_NOMADIK config HAS_MTU bool - select HAVE_SCHED_CLOCK help Support for Multi Timer Unit. MTU provides access to multiple interrupt generating programmable 32-bit free running decrementing counters. +config NOMADIK_MTU_SCHED_CLOCK + bool + depends on HAS_MTU + select HAVE_SCHED_CLOCK + help + Use the Multi Timer Unit as the sched_clock. + endif diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index ef74e15..bd638c5 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -24,7 +24,7 @@ #include <plat/mtu.h> void __iomem *mtu_base; /* Assigned by machine code */ - +#ifdef CONFIG_NOMADIK_MTU_SCHED_CLOCK /* * Override the global weak sched_clock symbol with this * local implementation which uses the clocksource to get some @@ -48,7 +48,7 @@ static void notrace nomadik_update_sched_clock(void) u32 cyc = -readl(mtu_base + MTU_VAL(0)); update_sched_clock(&cd, cyc, (u32)~0); } - +#endif /* Clockevent device: use one-shot mode */ static void nmdk_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev) @@ -153,9 +153,9 @@ void __init nmdk_timer_init(void) rate, 200, 32, clocksource_mmio_readl_down)) pr_err("timer: failed to initialize clock source %s\n", "mtu_0"); - +#ifdef CONFIG_NOMADIK_MTU_SCHED_CLOCK init_sched_clock(&cd, nomadik_update_sched_clock, 32, rate); - +#endif /* Timer 1 is used for events */ clockevents_calc_mult_shift(&nmdk_clkevt, rate, MTU_MIN_RANGE); |