[meta-intel] gpio sus configuration as interrupt

[Darren Hart]

Gpiolib uses the Linux namespace for the GPIO lines, you just use those
numbers, you do not differentiate based on register bank. See the output of
/sys/kernel/debug/gpio for the ranges of each gpiochip (or bank in this
case).

I personally have not done the gpios as interrupts so can't speak from
experience there. The GPIO documentation does cover it though. Have you read
through it?

-- 
Darren Hart
Yocto Project - Linux Kernel
Intel Open Source Technology Center

From:  VijayKumar N <nvijaykumar.engineer at gmail.com>
Date:  Wednesday, March 19, 2014 at 20:35
To:  Darren Hart <dvhart at linux.intel.com>
Cc:  Paul Eggleton <paul.eggleton at linux.intel.com>, "chiau.ee.chew"
<chiau.ee.chew at intel.com>, <meta-intel at yoctoproject.org>
Subject:  Re: [meta-intel] gpio sus configuration as interrupt

> Thanks all for providing valuable information.
> another query here,please provide your iputs:
> Iam configuring GPIOs belonging to each of the register banks as direction
> input/ouput & also as interrupts from a different kernel driver.Iam using
> gpiolib APIs like gpio_request(),gpio_to_irq() to achive this.How do I
> differentiate configuring GPIOs related to each of the register bank ?Is it
> possible to configure GPIOs as input/output & also as interrupts?If yes,how?
> 
> Thanks & Regards,
> Kumar
> 
> 
> On Tue, Mar 18, 2014 at 11:09 PM, Darren Hart <dvhart at linux.intel.com> wrote:
>> On 3/18/14, 9:47, "Paul Eggleton" <paul.eggleton at linux.intel.com> wrote:
>> 
>>> >On Tuesday 18 March 2014 08:52:31 Darren Hart wrote:
>>>> >> On Intel there is an upcoming modification to the ACPI specification
>>>> >>that
>>>> >> will enable you to describe in ACPI via named method (_PRP) what you
>>>> >>can do
>>>> >> in Device Tree for the other architectures. In the meantime, board
>>>> >>files are
>>>> >> the most expedient option. For more detail on both the _PRP and board
>>>> >> files, see my "How not to write an x86 platform driver" presentation at
>>>> >>the
>>>> >> 2013 Embedded Linux Europe Conference:
>>>> >>
>>>> >>
>>>> >>http://events.linuxfoundation.org/sites/events/files/slides/x86-platform.
>>>> >>pdf
>>>> >>
>>>> >> And I think there is video..... but I can't seem to find it. Perhaps
>>>> >>your
>>>> >> google foo will prove superior ;-)
>>> >
>>> >http://www.youtube.com/watch?v=IZuNCN7wkqs
>>> >
>>> >(I watched it recently - great presentation BTW :)
>> 
>> Ah, great. Thank you Paul!
>> 
>> --
>> Darren Hart
>> Yocto Project - Linux Kernel
>> Intel Open Source Technology Center
>> 
>> 
>> 
>> 
> 


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