User space interface for GPIO interrupts

[Peter Blok]

Hi Chris,

Do you have an example or any documentation how to use kqueue with interrupts?

Peter

> On 3 Jun 2019, at 11:46, Maverick Kuo <maverick.kuo at gmail.com> wrote:
> 
> Sorry, I got it wrong, gpio interrupt is really available, BUT I forgot, I
> have a patched from https://github.com/ckraemer/freebsd/tree/gsoc2018
> 
> Just after the comparison was revised, I found out that I apologize again.
> 
> Regards,
> Chris
> 
> Maverick Kuo <maverick.kuo at gmail.com> 於 2019年6月3日 週一 下午4:00寫道：
> 
>> Hi,
>> 
>> Good News !!
>> 
>> after cvs to 12.0-STABLE #0 r348527M GPIO Interrupt with kqueue Works !!!
>> 
>> Thanks to the developers :)
>> 
>> Regards,
>> Chris
>> 
>> Maverick Kuo <maverick.kuo at gmail.com> 於 2019年6月3日 週一 下午2:56寫道：
>> 
>>> Hi,
>>> 
>>> i am running  12.0-STABLE r348448  arm64 on raspberry pi3 b+.
>>> 
>>> Look at the kernel and it seems that all the functions related to gpio
>>> interrupt are available.
>>> 
>>> System startup process
>>> Bcm_gpio_intr_attach =>>
>>> Bus_setup_intr
>>> ?? bcm_gpio_intr_bank[0,1]
>>> ?? bcm_gpio_intr_internal
>>> 
>>> It seems that BCM_GPIO_GPEDS (Event Status) will be read in the
>>> bcm_gpio_intr_internal function but it is not executed there.
>>> 
>>> am I missed that part??
>>> 
>>> Let users use kqueue/kevent to monitor gpio interrupt to reduce cpu load.
>>> 
>>> Regards,
>>> Chris
>>> 
>> 
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