2008-04-17 06:16:54 request_irq of GPIO_PFx after request failed in 08R1-RC8

Wei Jiang (CHINA)

Message: 54405 Dear all,

Look at this code:

gpio_request(gpio, DRV_NAME); //success

gpio_direction_input(gpio);

request_irq(gpio_to_irq(gpio),....,XX_NAME,....); //always failed.

The error message is

"bfin-gpio: GPIO xx is already reserved by DRV_NAME !"

Maybe there is "request gpio code" in request_irq function?

Then how can I use the interrupt of the GPIO_PF?

Thank you.

Wei Jiang

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2008-04-17 06:43:04 Re: request_irq of GPIO_PFx after request failed in 08R1-RC8

Wei Jiang (CHINA)

Message: 54407 To Michael Hennerich,

I saw that you said:

"So You are using trunk ... This is a know issue

See here:

[#3919] Allow concurrent use of GPIO and GPIO IRQ

For now please use 2008R1

-Michael"

Actually I'm using the 08R1-RC8 kernel now. This bug exists too:)

Wei Jiang

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2008-04-17 06:55:53 Re: request_irq of GPIO_PFx after request failed in 08R1-RC8

Michael Hennerich (GERMANY)

Message: 54409 What are you trying to do?

Request IRQ and then read current state, using GPIO API?

For now:

Simply request the IRQ and then read without requesting the GPIO.

Also don't call gpio_direction_input(gpio)., because request IRQ will set the GPIO as input.

-Michael

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2008-04-17 07:19:19 Re: request_irq of GPIO_PFx after request failed in 08R1-RC8

Wei Jiang (CHINA)

Message: 54410 Dear Michael,

So sorry for my poor English:) I used this method because of "gpio_keys.c"

Now I saw the file "mach-common/ints-priority.c" and know how it works.It should not be a bug.

Thanks very much.

Wei Jianga