[MinnowBoard] Find GPIO Interrupt Line

[Darren Hart]

Melvyn,

We're currently looking into what may be missing here from the public
documentation. The intent of the MinnowBoard program is to be as open as
possible. We will follow-up with what we learn.

Thanks,

On 10/9/15 2:53 PM, melvyn wrote:
> Bottom of Page 4526.
> 
>  
> 
>       “LPC Bridge has no interrupt to disable” do not think this is what
> we both need.
> 
>  
> 
>        (LPC is a group of GPIO pins used as a “low pin count buss”)
> 
>  
> 
> Try page 4572..
> 
>  
> 
> Good luck;
> 
> Personally I am going to use a SPI I/O Expander chip to capture my
> 500nSec pulse.
> 
>  
> 
> If Intel read this why duplicate pages when the only difference between
> most GPIO Pins is the base addresses.
> 
> 5308 pages at least 25% seem to duplicates.
> 
> NDA agreements! How do Intel expect us use these chips? We are not
> expecting design documentation, just programmers reference material.
> Design , it would be nice if we could read 8 or 16 bits with one
> instruction.  Something the Quark can do.
> 
> Legacy bridges, the legacy world was bytes or words, I/O as bits is new
> world.
> 
>  
> 
>  
> 
> *From:*elinux-MinnowBoard
> [mailto:elinux-minnowboard-bounces at lists.elinux.org] *On Behalf Of *czq
> *Sent:* 07 October 2015 16:59
> *To:* elinux-minnowboard at lists.elinux.org
> *Subject:* [MinnowBoard] Find GPIO Interrupt Line
> 
>  
> 
> Hi there,
> 
>  
> 
> I'm reading /Intel® AtomTM Processor E3800 Product Family Datasheet/,
> trying to find out the interrupt line of GPIO.
> 
> Unlike most other PCI devices, which ususally have an interrupt register
> at 3c-3fh in its PCI configuration space, GPIO/LPC has a weird (at least
> to me) configuration space (page 4525)... I don't know how to find its
> interrupt line.
> 
>  
> 
> In the GPIO chapter, I can see it has memory mapped registers called
> Direct Interrupt Multiplexer. But I can't really understand the
> description. It also says that more details are available in
> /VLV2_GPIO_configuration_primer presentation./
> 
>  
> 
> So does anyone know where I can find the
> /VLV2_GPIO_configuration_primer/ presentation (I searched a lot but no
> luck...).
> 
> Or any thoughts and hints about how to find the interrupt line?
> 
>  
> 
> Thanks a lot!
> 
> Tom.
> 
>  
> 
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-- 
Darren Hart
Intel Open Source Technology Center