Return-path: Received: from victor.provo.novell.com ([137.65.250.26]:36526 "EHLO victor.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756044Ab2CEIGO convert rfc822-to-8bit (ORCPT ); Mon, 5 Mar 2012 03:06:14 -0500 Received: by bkcik5 with SMTP id ik5so2860102bkc.19 for ; Mon, 05 Mar 2012 00:06:02 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: Date: Mon, 5 Mar 2012 16:06:02 +0800 Message-ID: (sfid-20120305_090617_979400_D801BE45) Subject: Re: [ath9k-devel] Any recommendation of direct access the GPIO from specific address ? From: Matt Chen To: Mohammed Shafi Cc: linux-wireless , ath9k-devel@lists.ath9k.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi, 2012/3/1 Mohammed Shafi : > On Wed, Feb 29, 2012 at 4:33 PM, Matt Chen 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 echo 0x404c to which file in /sys/kernel/debug/ath9k ? Thanks >> >> Thank you for your patience. :) >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at ?http://vger.kernel.org/majordomo-info.html > > > > -- > thanks, > shafi >