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| author | Fabio Baltieri <fabio.baltieri@linaro.org> | 2012-12-04 11:10:44 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-01-07 16:03:35 +0100 |
| commit | 6f179b724b1488ead0acc1a04f2adade99ca0736 (patch) | |
| tree | 0c66122c28f5535a83777bf294b072eed4397a05 /drivers/clocksource | |
| parent | 0baf066fcbc408c75dc161a9298fc4bfdde6051f (diff) | |
| download | lwn-6f179b724b1488ead0acc1a04f2adade99ca0736.tar.gz lwn-6f179b724b1488ead0acc1a04f2adade99ca0736.zip | |
clocksource: nomadik-mtu: support timer-based delay
This patch adds support to use Nomadik MTU for timer-based delay.
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/nomadik-mtu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c index 8914c3c1c88b..5f3c8dbf360f 100644 --- a/drivers/clocksource/nomadik-mtu.c +++ b/drivers/clocksource/nomadik-mtu.c @@ -15,6 +15,7 @@ #include <linux/clocksource.h> #include <linux/clk.h> #include <linux/jiffies.h> +#include <linux/delay.h> #include <linux/err.h> #include <linux/platform_data/clocksource-nomadik-mtu.h> #include <asm/mach/time.h> @@ -64,6 +65,7 @@ static void __iomem *mtu_base; static bool clkevt_periodic; static u32 clk_prescale; static u32 nmdk_cycle; /* write-once */ +static struct delay_timer mtu_delay_timer; #ifdef CONFIG_NOMADIK_MTU_SCHED_CLOCK /* @@ -80,6 +82,11 @@ static u32 notrace nomadik_read_sched_clock(void) } #endif +static unsigned long nmdk_timer_read_current_timer(void) +{ + return ~readl_relaxed(mtu_base + MTU_VAL(0)); +} + /* Clockevent device: use one-shot mode */ static int nmdk_clkevt_next(unsigned long evt, struct clock_event_device *ev) { @@ -227,4 +234,8 @@ void __init nmdk_timer_init(void __iomem *base, int irq) setup_irq(irq, &nmdk_timer_irq); nmdk_clkevt.cpumask = cpumask_of(0); clockevents_config_and_register(&nmdk_clkevt, rate, 2, 0xffffffffU); + + mtu_delay_timer.read_current_timer = &nmdk_timer_read_current_timer; + mtu_delay_timer.freq = rate; + register_current_timer_delay(&mtu_delay_timer); } |