2008-04-02 21:12:24 gpio-keys

Jonathan Kotta (UNITED STATES)

Message: 53574 I have a bf548-ezkit rev 1.6. I'm having trouble with gpio-keys. I've used them before on another architecture, and read the wiki page for blackfin gpio-keys. My PB switches (SW5) are all on.

The driver has apparently has trouble registering the irqs. There are no errors (request_irq() returns 0), but no interrupts are generated.

root:/proc> cat /proc/interrupts | grep gpio-keys

127: 0 gpio-keys: BTN0

128: 0 gpio-keys: BTN1

129: 0 gpio-keys: BTN2

130: 0 gpio-keys: BTN3

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2008-04-02 23:34:36 Re: gpio-keys

Yi Li (CHINA)

Message: 53576 What is the kernel version you are using? I tested the input/keyboard/gpio-keys.c driver on r1.3 548EZkit, with 2008r1 branch, it works well.

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2008-04-03 11:28:52 Re: gpio-keys

Jonathan Kotta (UNITED STATES)

Message: 53607 I'm using rev 4535 (Apr. 2) from subversion. Same thing happens with svn 4396 (Mar. 1). I'll try the 2008r1.

I forgot to mention, there are a bunch of error messages at boot up saying that GPIO 24-27 are being used by gpio-keys. I think this is from the generic GPIO driver, right after gpio-keys in ezkit.c. I am assuming this is not a problem because a) it says gpio-keys already has the GPIO and b) the generic GPIO driver doesn't set up interrupts (AFAIK).

bfin-gpio: GPIO 27 is already reserved by gpio-keys: BTN3 !

Hardware Trace:

0 Target : <0x000044fc> { _dump_stack + 0x0 }

Source : <0x000056f0> { _gpio_request + 0x108 }

1 Target : <0x000056f0> { _gpio_request + 0x108 }

Source : <0x0000d706> { _printk + 0x16 }

...

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2008-04-03 11:38:24 Re: gpio-keys

Michael Hennerich (GERMANY)

Message: 53608 So You are using trunk ... This is a know issue

See here: