IMX8MM Interrupt issue

tzeng015 — Mon, 28 Nov 2022 11:29:07 GMT

Hi all

I have a interrupt serial problem and I need your help.

platform : imx8mm

Linux : 5.10

Please see the attach file .

Page 2 :

DTS : IRQ_TYPE_LEVEL

Function : request_threaded_irq (spi->irq, NULL, mcp251xfd_irq,
IRQF_ONESHOT | IRQF_TRIGGER_LOW , dev_name(&spi->dev),
priv)

Summary : (1) ip link set up can0 type can bitrate 500000 (It is called request_threaded_irq) . Why the interrupt is generated and make a call trace ?

Page 4 :

DTS : IRQ_TYPE_EDGE_FALLING

Function : request_threaded_irq (spi->irq, NULL, mcp251xfd_irq,
IRQF_ONESHOT | IRQF_TRIGGER_FALLING , dev_name(&spi->dev),
priv)

Summary : (1) ip link set up can0 type can bitrate 500000 (It is called request_threaded_irq) . Why the interrupt do not have any action ?

MY question:

Why the only IRQ_TYPE_LEVEL can gererate INT (call trace)?

Why the IRQ_TYPE_EDGE_FALLING can not gererate INT ?

topic IMX8MM Interrupt issue in i.MX Processors

IMX8MM Interrupt issue