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| author | Hans Ulli Kroll <ulli.kroll@googlemail.com> | 2015-08-11 22:09:05 +0200 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2015-08-13 11:41:52 +0200 |
| commit | d330615b90d4997909806f8c22be6a3a2c3449b9 (patch) | |
| tree | b31a79b6348b4e6f48375be9e2e20929e08de35c /arch/arm/mach-gemini | |
| parent | ARM: gemini: Use timer1 for clockevent (diff) | |
| download | linux-d330615b90d4997909806f8c22be6a3a2c3449b9.tar.xz linux-d330615b90d4997909806f8c22be6a3a2c3449b9.zip | |
ARM: gemini: Setup timer3 as free running timer
In the original driver it is missed to setup a free running driver.
This timer is needed for the scheduler.
So setup it.
Signed-off-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mach-gemini')
| -rw-r--r-- | arch/arm/mach-gemini/time.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/arch/arm/mach-gemini/time.c b/arch/arm/mach-gemini/time.c index 5e2b1bab4462..f5f18df5aacd 100644 --- a/arch/arm/mach-gemini/time.c +++ b/arch/arm/mach-gemini/time.c @@ -15,6 +15,7 @@ #include <asm/mach/time.h> #include <linux/clockchips.h> #include <linux/clocksource.h> +#include <linux/sched_clock.h> /* * Register definitions for the timers @@ -62,6 +63,11 @@ static unsigned int tick_rate; +static u64 notrace gemini_read_sched_clock(void) +{ + return readl(TIMER_COUNT(TIMER3_BASE)); +} + static int gemini_timer_set_next_event(unsigned long cycles, struct clock_event_device *evt) { @@ -206,8 +212,21 @@ void __init gemini_timer_init(void) writel(TIMER_DEFAULT_FLAGS, TIMER_CR); /* - * Setup clockevent timer (interrupt-driven.) + * Setup free-running clocksource timer (interrupts + * disabled.) */ + writel(0, TIMER_COUNT(TIMER3_BASE)); + writel(0, TIMER_LOAD(TIMER3_BASE)); + writel(0, TIMER_MATCH1(TIMER3_BASE)); + writel(0, TIMER_MATCH2(TIMER3_BASE)); + clocksource_mmio_init(TIMER_COUNT(TIMER3_BASE), + "gemini_clocksource", tick_rate, + 300, 32, clocksource_mmio_readl_up); + sched_clock_register(gemini_read_sched_clock, 32, tick_rate); + + /* + * Setup clockevent timer (interrupt-driven.) + */ writel(0, TIMER_COUNT(TIMER1_BASE)); writel(0, TIMER_LOAD(TIMER1_BASE)); writel(0, TIMER_MATCH1(TIMER1_BASE)); |