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

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Message-ID: <20240822-holistic-fearless-bloodhound-e9095e-mkl@pengutronix.de>
Date: Thu, 22 Aug 2024 08:57:39 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Tarang Raval <tarang.raval@...iconsignals.io>
Cc: krzk+dt@...nel.org, festevam@...il.com, shawnguo@...nel.org, 
	Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, 
	devicetree@...r.kernel.org, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arm64: dts: imx8mm-emtop-baseboard: Add Peripherals
 Support

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

-- 
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