i.MX ProcessorsのトピックRe: Imx93 GPIO interrupt

Imx93 GPIO interrupt

frebourg — Wed, 02 Oct 2024 13:20:35 GMT

How to use GPIO interrupt on kernel driver (on linux 6.6)

Is somebody can share sample code of linux driver using interrupt on GPIO

Re: Imx93 GPIO interrupt

frebourg — Wed, 02 Oct 2024 15:02:44 GMT

Adding current driver source and dts.

gpio_interrupt declared in /proc/interrupts

root@board:~# cat /proc/interrupts CPU0 CPU1 13: 36966 43746 GICv3 26 Level arch_timer 14: 11423 14496 GICv3 106 Level timer@44290000 ... 96: 0 0 GICv3 98 Level 42560000.spi 99: 7450 0 GICv3 119 Level mmc1 100: 0 0 gpio-vf610 0 Edge 42860000.mmc cd 101: 0 0 gpio-vf610 10 Edge gpio_interrupt ... Err: 0

in /sys/kernel/debug/gpio , GPIO sees OK .

root@board:~# cat /sys/kernel/debug/gpio gpiochip0: GPIOs 512-543, parent: platform/43810000.gpio, 43810000.gpio: .. gpio-522 (IRQ_AEMPTY |gpio_interrupt ) in hi IRQ gpio-523 (IRQ_AFULL ) ..

Everithing seems ok, Checked GPIO change with scope. But no interrupt detected .

Any idea ?

Re: Imx93 GPIO interrupt

frebourg — Mon, 07 Oct 2024 07:26:10 GMT

Interrupt is ok if cortex-M not started.

Is it possible to have interruption on Cortex-A and Cortex-M on the same GPIO (GPIO2) ?

Re: Imx93 GPIO interrupt

Manuel_Salas — Mon, 07 Oct 2024 19:00:49 GMT

Hello @frebourg

I hope you are doing well.

Unfortunately this is difficult to achieve, it is preferable to assing resources to be used from Cortex A and from Cortex M.

Maybe you can make an application for Cortex M and communicate the cores in RPMSG.

You can take a look to this post as started point:

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/GPIOs-Interrupt-i-MX93-M33/ta-p/1909424

I hope this information can helps to you.

Best regards,

Salas.