I have a problem with my i.mx28 based custom board. My custom board works with Linux ed it is connected by NFS to my host computer.
I have connectet pin ENET0_TXD2 to an external device and I have configured this pin as a input gpio. In my driver I have set this pin as input,
and I have called the interrupt request function;
pin = gpio_to_irq(ENET0_TXD2);
request_irq ( pin, &interruptFunction, IRQF_TRIGGER_RISING, ..., NULL );
irqreturn_t interruptFunction (int irq, void *dev_id)
The problem is that when there is a rising edge on the ENET0_TXD2 pin nothing happens, i.e. the interrupt function associated to a rising edge on the pin ENET0_TXD2 is never called.
I have repleced pin ENET0_TXD2 with another pin (LCD_HSYNC) and everything works perfectly.
Why with pin ENET_TXD2 the interrupt function is never called?
I have to change some particular setting in the kernel (ethernet driver ecc ecc)?
Do you have any suggestions?