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omap: timer: implement timer_get_boot_us

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To make the OMAP DM timer driver useful for the timing of
bootstages, we need to implement timer_get_boot_us(..).

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
This commit is contained in:
Christian Gmeiner 2021-12-16 10:57:29 +01:00 committed by Tom Rini
parent b6e59617c8
commit e660cfad53
1 changed files with 21 additions and 0 deletions
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21
drivers/timer/omap-timer.c
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@ -83,6 +83,27 @@ static int omap_timer_of_to_plat(struct udevice *dev)
return 0;
}
#if CONFIG_IS_ENABLED(BOOTSTAGE)
ulong timer_get_boot_us(void)
{
u64 ticks = 0;
u32 rate = 1;
u64 us;
int ret;
ret = dm_timer_init();
if (!ret) {
/* The timer is available */
rate = timer_get_rate(gd->timer);
timer_get_count(gd->timer, &ticks);
} else {
return 0;
}
us = (ticks * 1000) / rate;
return us;
}
#endif
static const struct timer_ops omap_timer_ops = {
.get_count = omap_timer_get_count,