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ARM: gemini: Setup timer3 as free running timer

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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>
This commit is contained in:
Hans Ulli Kroll 2015-08-11 22:09:05 +02:00 committed by Olof Johansson
parent 5dc9073988
commit d330615b90
1 changed files with 20 additions and 1 deletions
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21
arch/arm/mach-gemini/time.c
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@ -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));