i.MX ProcessorsのトピックGPIO2 irq interrupt question

GPIO2 irq interrupt question

caoping — Fri, 26 Apr 2013 08:06:14 GMT

hi,every!

now we use imx53 to develop,and software environment is linux, and we want to response a rising interrupt of 14 pin of GPIO2(IRQ number in datasheet is 52),Once we set ICR14 of GPIO2 to "0x10",and set the 14 bit of GPIO2_IMR to "1",when we use "request_irq(irq, irq_handle_function,0, interface, NULL)" in driver,and the return value is 0xfffffffea,and then the serial terminal displays"failed",Does anyone meet this!

Re: GPIO2 irq interrupt question

weidong_sun — Sat, 27 Apr 2013 03:45:44 GMT

Hello,cao,

Please try to do it like this :

At first , I assume you use GPIO3_2, Then

#include <mach/gpio.h>

#define MY_GPIO3_2 (2x32 + 2)

int irq = gpio_to_irq( MY_GPIO3_2);

request_irq(irq, irq_handle_function,0, interface, NULL);

....

Try it please !

Regards,

weidong