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lib: sbi_timer: Introduce sbi_timer_compute_delta() and friends

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The users of timer event have to compute next_event (aka timer value
in the future) based on desired units and unit frequency. Introduce
sbi_timer_compute_delta() and friends to simplify computing next_event
for timer event users.

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Link: https://lore.kernel.org/r/20260425104048.2335262-5-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-04-25 16:10:48 +05:30
committed by Anup Patel
parent b7fa8a246c
commit 1932ee3f0a
2 changed files with 37 additions and 4 deletions
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lib/sbi/sbi_timer.c
+10 -4
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@@ -58,6 +58,15 @@ static void nop_delay_fn(void *opaque)
cpu_relax();
}
u64 sbi_timer_compute_delta(ulong units, u64 unit_freq)
{
u64 delta;
delta = ((u64)timer_dev->timer_freq * (u64)units);
delta = delta / unit_freq;
return delta;
}
void sbi_timer_delay_loop(ulong units, u64 unit_freq,
void (*delay_fn)(void *), void *opaque)
{
@@ -72,15 +81,12 @@ void sbi_timer_delay_loop(ulong units, u64 unit_freq,
/* Save starting timer value */
start_val = get_time_val();
/* Compute desired timer value delta */
delta = ((u64)timer_dev->timer_freq * (u64)units);
delta = delta / unit_freq;
/* Use NOP delay function if delay function not available */
if (!delay_fn)
delay_fn = nop_delay_fn;
/* Busy loop until desired timer value delta reached */
delta = sbi_timer_compute_delta(units, unit_freq);
while ((get_time_val() - start_val) < delta)
delay_fn(opaque);
}