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clocksource/drivers/ixp4xx: Implement delay timer 

This adds delay timer functionality to the IXP4xx
timer driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Linus Walleij 2019-05-23 20:16:02 +02:00 committed by Daniel Lezcano
parent 91d59bdf87
commit 8925ed4b10
1 changed files with 14 additions and 2 deletions
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16
drivers/clocksource/timer-ixp4xx.c
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@ -75,14 +75,19 @@ to_ixp4xx_timer(struct clock_event_device *evt)
return container_of(evt, struct ixp4xx_timer, clkevt);
}
static u64 notrace ixp4xx_read_sched_clock(void)
static unsigned long ixp4xx_read_timer(void)
{
return __raw_readl(local_ixp4xx_timer->base + IXP4XX_OSTS_OFFSET);
}
static u64 notrace ixp4xx_read_sched_clock(void)
{
return ixp4xx_read_timer();
}
static u64 ixp4xx_clocksource_read(struct clocksource *c)
{
return __raw_readl(local_ixp4xx_timer->base + IXP4XX_OSTS_OFFSET);
return ixp4xx_read_timer();
}
static irqreturn_t ixp4xx_timer_interrupt(int irq, void *dev_id)
@ -224,6 +229,13 @@ static __init int ixp4xx_timer_register(void __iomem *base,
sched_clock_register(ixp4xx_read_sched_clock, 32, timer_freq);
#ifdef CONFIG_ARM
/* Also use this timer for delays */
tmr->delay_timer.read_current_timer = ixp4xx_read_timer;
tmr->delay_timer.freq = timer_freq;
register_current_timer_delay(&tmr->delay_timer);
#endif
return 0;
}