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Provide implementation of sched_clock() #51

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merged 2 commits into from
Jul 24, 2015
Merged

Provide implementation of sched_clock() #51

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6b892c2
MIPS: Add sched_clock support
dczhu Mar 7, 2015
c47eed2
clocksource: jz4780-tcu: Provide sched_clock() implementation
Jul 17, 2015
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1 change: 1 addition & 0 deletions arch/mips/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ config MIPS
select GENERIC_SMP_IDLE_THREAD
select BUILDTIME_EXTABLE_SORT
select GENERIC_CLOCKEVENTS
select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC
select GENERIC_CMOS_UPDATE
select HAVE_MOD_ARCH_SPECIFIC
select VIRT_TO_BUS
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7 changes: 7 additions & 0 deletions drivers/clocksource/jz4780-tcu.c
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Expand Up @@ -10,6 +10,7 @@

#include <linux/clocksource.h>
#include <linux/err.h>
#include <linux/sched_clock.h>

#include "jz47xx-tcu.h"

Expand Down Expand Up @@ -51,6 +52,11 @@ static cycle_t jz4780_tcu_clocksource_read(struct clocksource *cs)
return jz47xx_tcu_read_channel_count(jz4780_tcu_clocksource.channel);
}

static u64 notrace jz4780_tcu_sched_read(void)
{
return jz47xx_tcu_read_channel_count(jz4780_tcu_clocksource.channel);
}

static void __init jz4780_tcu_init(struct device_node *np)
{
struct jz47xx_tcu *tcu;
Expand All @@ -72,6 +78,7 @@ static void __init jz4780_tcu_init(struct device_node *np)

err = clocksource_register_hz(&jz4780_tcu_clocksource.cs, rate);
BUG_ON(err);
sched_clock_register(jz4780_tcu_sched_read, 64, rate);

/* For local clock events */
err = jz47xx_tcu_setup_cevt(tcu, 5);
Expand Down