[PATCH] RFC: interrupt consistency check for OF GPIO IRQs
Alexander Holler
holler at ahsoftware.de
Wed Sep 11 03:30:27 EDT 2013
And another small update. ;)
Am 11.09.2013 09:16, schrieb Alexander Holler:
>> To summarize what happens if a driver uses a gpio as irq:
>>
>> gpio_request() // This works only if the gpio was not requested before
>> gpio_direction_input()
>> gpio_to_irq() // This needs an irq-mapping
>> request_threaded_irq()
>>
>> So I would suggest multiple steps to change that:
>>
>> 1. Create a mapping for every gpio found in DT (or all gpios if no DT is
>> used). I think that is what Linus patch does (sorry, I haven't really
>> followed this thread and didn't look in deep at the patch).
>>
>> 2. Implement gpio_request_for_irq()
>> This would just be a small macro for gpio_request();
>> gpio_direction_input()
>>
I would add gpio_to_irq() to that macro, so that it returns the irq
number or zero if something failed.
Regards,
Alexander Holler
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