[MinnowBoard] Find GPIO Interrupt Line
Darren Hart
dvhart at linux.intel.com
Fri Oct 9 22:22:10 UTC 2015
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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>
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>
>
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--
Darren Hart
Intel Open Source Technology Center
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