LINUXSDK-OMAPL138: GPIO interrupt

Nancy Wang

Hi,

The customer registered GPIO interrupts. But only GPIO(GP7_14 GP7_11) cannot enter ISR when the signal level changed. Below is the related code:

for (i = 0; i < pData->auxKeyParam->gpioNum; i++)
{
ret = gpio_request(gpio, "aux_keypad");
if (ret)
{
printk(KERN_ERR "Request aux key gpio%d failed! ret = %d\n", gpio, ret);
return ret;
}

ret = gpio_direction_input(gpio);
}

ret = request_irq(gpio_to_irq(gpio), AuxiliaryKeyIsr,\
IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,\
"auxiliaryKey", (void *)pKeypad);

cat /proc/interrupts :

116: 6 GPIO auxiliaryKey

137: 0 GPIO matrixkeypad
140: 0 GPIO rotationKey
145: 0 GPIO auxiliaryKey
158: 0 GPIO matrixkeypad
161: 0 GPIO auxiliaryKey
167: 0 GPIO rotationKey
169: 0 GPIO matrixkeypad
224: 0 GPIO auxiliaryKey
227: 0 GPIO auxiliaryKey

These two pins are not used anywhere else and pinmux have already been configured, other GPIOs can be triggered normally except BANK7.

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

Hi,

Which Processor SDK Linux is this? Which driver do they modify? Can you share the dts (or board file)?

Best Regards,
Yordan

0 Nancy Wang over 6 years ago in reply to Yordan Kovachev

TI__Expert 8210 points

Hi,

SDK:linux-2.6.37-psp03.21.00.04.sdk.tar.bz2

He modified base on the driver in SDK. It seems an old version. I will recommend the customer to use the latest version. But are there any suggestions to help him in his problem?

0 Nancy Wang over 6 years ago in reply to Yordan Kovachev

TI__Expert 8210 points

Hi,

Any updates？

0 Nancy Wang over 6 years ago in reply to Nancy Wang

TI__Expert 8210 points

Hi,

It is not convenient for customers to change SDK now. Could you please help provide some methods to check why only GPIO(GP7_14 GP7_11) could not be triggered?

0 Yordan Kovachev over 6 years ago in reply to Nancy Wang

TI__Guru**** 161600 points

Hi,

Apologies for the delay. I am not familiar with the release they use. I'll consult the design team and they'll update the thread directly here.

Best Regards,
Yordan

0 Rex Chang over 6 years ago in reply to Yordan Kovachev

TI__Guru 50170 points

Hi, Nancy,

The SDK is too old and we won't be able to support that version, but provide guidance.

Are all pins in bank 7 not working? If this is the case, The possible cause is clock not applied to bank 7. Has customer checked that?

If other bank 7 pins work, it could be the 2 pins used have wrong pinmux configured. Has customer tried to move to other working pins in bank 7 to see if they work?

I assume that customer has verified that the signal has toggled in the scope and behave the same as other working pins.

We can't think of other reasons causing only those 2 pins not working if that is the case.

Also, you mentioned that the customer modified the kernel driver. This probably also need to be looked at to be sure it covers all cases if the modification is in GPIO/interrupt related area.

Rex

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LINUXSDK-OMAPL138: GPIO interrupt