topic Re: ls1046a how to use IRQ0~11 in kernel? in Layerscape

ls1046a how to use IRQ0~11 in kernel?

Rainight — Fri, 18 Feb 2022 07:40:13 GMT

RCW

Reference Mamnul

DTS

I want to known How to use IRQ0~11 in kernel module independly without "of function"?

and I use follwed code , but all failed。

irq = 167; //irq = 167 - 32; //irq = 3; //no = irq_create_mapping(NULL, irq); irq_set_irq_type(irq , IRQ_TYPE_LEVEL_LOW); ret = request_irq(irq, irq_data_handle, IRQF_SHARED, "irqdata", &self);

Re: ls1046a how to use IRQ0~11 in kernel?

Pavel — Fri, 25 Feb 2022 05:30:15 GMT

There is a lot of information about IRQ using under Linux.

For example see the following pages:

https://www.kernel.org/doc/html/latest/core-api/irq/concepts.html#:~:text=An%20IRQ%20is%20an%20interrupt,about%20a%20hardware%20interrupt%20source.

https://www.kernel.org/doc/html/v4.12/core-api/genericirq.html

https://www.oreilly.com/library/view/understanding-the-linux/0596005652/ch04s06.html

https://stackoverflow.com/questions/14082048/startup-code-for-linux-irq-interrupt-hander-for-arm

http://venkateshabbarapu.blogspot.com/2012/09/interrupt-handling-in-arm.html

Re: ls1046a how to use IRQ0~11 in kernel?

Pavel — Fri, 25 Feb 2022 05:35:37 GMT

Use also the "cat /proc/interrupts" command.

See the following document:

https://www.thegeekstuff.com/2014/01/linux-interrupts/