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clocksource: cadence_ttc: Reuse clocksource as sched_clock
Reuse the TTC clocksource timer as sched clock provider. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Michal Simek <monstr@monstr.eu>
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1 changed files with 12 additions and 0 deletions
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@ -21,6 +21,7 @@
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#include <linux/of_address.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_irq.h>
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#include <linux/slab.h>
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#include <linux/slab.h>
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#include <linux/sched_clock.h>
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/*
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/*
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* This driver configures the 2 16-bit count-up timers as follows:
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* This driver configures the 2 16-bit count-up timers as follows:
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@ -94,6 +95,8 @@ struct ttc_timer_clockevent {
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#define to_ttc_timer_clkevent(x) \
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#define to_ttc_timer_clkevent(x) \
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container_of(x, struct ttc_timer_clockevent, ce)
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container_of(x, struct ttc_timer_clockevent, ce)
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static void __iomem *ttc_sched_clock_val_reg;
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/**
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/**
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* ttc_set_interval - Set the timer interval value
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* ttc_set_interval - Set the timer interval value
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*
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*
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@ -155,6 +158,11 @@ static cycle_t __ttc_clocksource_read(struct clocksource *cs)
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TTC_COUNT_VAL_OFFSET);
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TTC_COUNT_VAL_OFFSET);
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}
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}
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static u32 notrace ttc_sched_clock_read(void)
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{
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return __raw_readl(ttc_sched_clock_val_reg);
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}
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/**
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/**
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* ttc_set_next_event - Sets the time interval for next event
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* ttc_set_next_event - Sets the time interval for next event
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*
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*
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@ -296,6 +304,10 @@ static void __init ttc_setup_clocksource(struct clk *clk, void __iomem *base)
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kfree(ttccs);
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kfree(ttccs);
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return;
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return;
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}
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}
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ttc_sched_clock_val_reg = base + TTC_COUNT_VAL_OFFSET;
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setup_sched_clock(ttc_sched_clock_read, 16,
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clk_get_rate(ttccs->ttc.clk) / PRESCALE);
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}
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}
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static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,
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static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,
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