[PATCH v2] arm64: dts: imx8mm-emtop-baseboard: Add Peripherals Support

Marc Kleine-Budde mkl at pengutronix.de
Wed Aug 21 23:57:39 PDT 2024


Hey Tarang Raval,

let's continue discussing things on the mailing list.

On 22.08.2024 06:42:49, Tarang Raval wrote:
> Thank you for the feedback. I noticed that some mainline DTS files,
> including the current upstream DTS, use edge-triggered interrupts.

I was talking about the mcp2515 CAN chip connected to SPI only. Can you
point me to the upstream DTS?

> Could you please help me understand the reasoning behind the
> preference for level-triggered interrupts over edge-triggered ones

If an edge interrupt occurs while the driver is in the ISR, it may
lose this interrupt. The driver will not process the pending interrupt
and CAN communication will get stuck.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
Vertretung Nürnberg              | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-9   |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20240822/021a4f9c/attachment.sig>


More information about the linux-arm-kernel mailing list