Commit 519e9f41 authored by Michal Simek's avatar Michal Simek

microblaze: Register timecounter/cyclecounter

It is the same counter as we use as free running one.
I would like to use it for ftrace.
Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent 24b45a12
...@@ -183,6 +183,31 @@ static cycle_t microblaze_read(struct clocksource *cs) ...@@ -183,6 +183,31 @@ static cycle_t microblaze_read(struct clocksource *cs)
return (cycle_t) (in_be32(TIMER_BASE + TCR1)); return (cycle_t) (in_be32(TIMER_BASE + TCR1));
} }
static struct timecounter microblaze_tc = {
.cc = NULL,
};
static cycle_t microblaze_cc_read(const struct cyclecounter *cc)
{
return microblaze_read(NULL);
}
static struct cyclecounter microblaze_cc = {
.read = microblaze_cc_read,
.mask = CLOCKSOURCE_MASK(32),
.shift = 24,
};
int __init init_microblaze_timecounter(void)
{
microblaze_cc.mult = div_sc(cpuinfo.cpu_clock_freq, NSEC_PER_SEC,
microblaze_cc.shift);
timecounter_init(&microblaze_tc, &microblaze_cc, sched_clock());
return 0;
}
static struct clocksource clocksource_microblaze = { static struct clocksource clocksource_microblaze = {
.name = "microblaze_clocksource", .name = "microblaze_clocksource",
.rating = 300, .rating = 300,
...@@ -204,6 +229,9 @@ static int __init microblaze_clocksource_init(void) ...@@ -204,6 +229,9 @@ static int __init microblaze_clocksource_init(void)
out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT); out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT);
/* start timer1 - up counting without interrupt */ /* start timer1 - up counting without interrupt */
out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT); out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT);
/* register timecounter - for ftrace support */
init_microblaze_timecounter();
return 0; return 0;
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment