Hello All,
I am using DM355 GPIO Bank 6 interrupt for one of the peripheral. We are
using the Montavista TI Davinci Linux 2.6.10 version.
I was trying to register an interrupt (IRQ = 60 for GPIO Bank 6 and the
GPIO used is 96) with Linux. It gave the invalid arguments. Then I did
debugging to check which argument is causing an issue. I identified the
irq_desc[irq].valid flag is not set and I did the hard coding for
setting this flag to 1 for IRQ 60. Then the request_irq API was
returning 0. This means that the interrupt is registered.
request_irq(IRQ_DM355_GPIOBNK6, isr, SA_INTERRUPT, "slave",NULL);
Also, I have configured the following for GPIO 96. The peripheral that
we are using will give falling edge interrupt.
1. To configure a GPIO interrupt to occur only on falling edges of the
GPIO signal:
* Write a logic 1 to the associated bit in SET_FAL_TRIG
* Write a logic 1 to the associated bit in CLR_RIS_TRIG
2. BINTEN for Bank 6.
3. Also the PINMUX register were taken care properly.
4. Even, the direction register are set for this GPIO 96.
Even though I did all the above settings, the ISR is not getting
triggered. I don't know the reason for this issue.
Moreover, I measured the IRQ line using CRO. There is a change in the
IRQ line. It goes from high to low.
Is there something, that the Linux is not processing the interrupt for
IRQ 60?
If anyone faced similar issue, please provide your valuable comments.
Thanks a lot in advance.
Regards,
Prabhaharan.R
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