Hi, so alarms of the Renesas RZ-N1 RTC can only have one-minute-granularity. However, it does have a one-second-interrupt. Has it been tried already for some driver to use such an interrupt to emulate second-granularity of the alarm? My searches did not yield results so far. So the idea is, of course, to the let the alarm fire on the minutes. Then, enable the second-update irqs until reading the seconds matches the requested seconds of the alarm. It would not only gain us a better resolution for alarms, but also allows for enabling UIE. I get it that handling the different interrupts may get tricky if e.g. there is a change in the timerqueue while something has already been setup or so. I need to research this, I have currently no idea how this is handled at all. But while doing so, I wanted to ask if there are already opinions if this approach is feasible or not. I can't imagine that I am the first one to try it, so there probably are experiences out there? Thanks and happy hacking, Wolfram
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