On 17.01.2022 14:53:46, Markus Mirevik wrote: > > That scope picture looks good! Can you include both runs of the IRQ > > handler in one scope picture? I'm interested if there is activity or > > a glich on IRQ line. > > Both are included. The last (number 7) is the one extra reading of the > register!? Doh! Indeed, you'r right, missed that. > > After you've that picture, you can try to catch glitches on the IRQ > > line. If your scope allows this, setup a trigger on the INT channel > > that triggers if the channel is low for considerably less then it > > takes to clear the IRQ. > > > > Currently it takes about 160µs to clear the IRQ, so setup a trigger > > for less than 50µs. > > No glitches. The scope can trigger on glitch but no one is to be > found. Good. It looks like this is not a problem of the mcp251xfd driver. I think now it's time to ask an am335x expert. Maybe one of my coworker knows this issue. regards, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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