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Date: Thu, 1 Mar 2012 10:33:03 +0530
Message-ID: <CAD2nsn2GLAo=8xhe+-Xm0igSmQ+tr1F+Q6scuFaeaQWMYrQbwg@mail.gmail.com> (sfid-20120301_060309_147073_08814B19)
Subject: Re: [ath9k-devel] Any recommendation of direct access the GPIO from
 specific address ?
From: Mohammed Shafi <shafi.wireless@gmail.com>
To: Matt Chen <machen@suse.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
	ath9k-devel@lists.ath9k.org
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Sender: linux-wireless-owner@vger.kernel.org

On Wed, Feb 29, 2012 at 4:33 PM, Matt Chen <machen@suse.com> wrote:
> Hi list,
>
> I am working on verifying the ath9k_rfkill_poll_state() function. It
> would execute the ath_is_rfkill_set() the read the GPIO and change the
> LED. I found the POLL_INTERVAL would take 5 secs according the
> definition in net/rfkill/core.c
> #define POLL_INTERVAL (5 * HZ)
> So it would detect the GPIO status in every 5 seconds. But the ath9k I
> run in different platform, with the same modules, it works different
> way. The LED for one is working very fast, in another one is working
> so slow.
>
> I would like to clarify it is driver or BIOS issues. The way I come
> out is manually to change the GPIO status, see how the driver work.
> But so far I only found the devmen2 to access the specific address of
> GPIO. Any other good ways recommended ?
> And another question is the address defined in reg.h correct to access
> ? Such as
> #define AR_GPIO_IN ? ?(AR_SERV_9340(ah)) ? 0x402c : 0x404c)
> can I access the value of 0x404c directly?

yes you can, one idea i have is to enable ath9k debug
http://linuxwireless.org/en/users/Drivers/ath9k/debug
and echo 0x404c in the regidx field in debug and keep looking for regval,
in which the corresponding rfkill related bit may toggle,  when the
rfkill is enabled

>
> Thank you for your patience. :)
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-- 
thanks,
shafi