drivers: timer: it8xxx2: enhances the accuracy of hw cycle calculation
This commit enhances the accuracy of hardware cycle calculation before
setting the IT8xxx2 event timer. The next target cycle is calculated by
the last, elapsed, and expected timeout ticks. And then, the difference
in hardware cycles between the target cycle and the current cycle is set
into the event timer. This increased accuracy effectively resolves the
clock drift issue.
Tested with:
west build -p always -b it8xxx2_evb tests/kernel/timer/timer_api
-T kernel.timer.tickless
west build -p always -b it8xxx2_evb tests/kernel/timer/timer_behavior
-T kernel.timer.timer
Fixes #67474 #67833
Signed-off-by: Ruibin Chang <Ruibin.Chang@ite.com.tw>
Signed-off-by: Ren Chen <Ren.Chen@ite.com.tw>
1 file changed
