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From: "Dilan Weerakkody" <dilan2005@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: MX21 keypad driver interrupt issue
Date: Wed, 22 Nov 2006 11:15:31 +0600	[thread overview]
Message-ID: <e65b9ae80611212115r42dccbfcha51d9c1e52964e5e@mail.gmail.com> (raw)
In-Reply-To: <e65b9ae80611212102x2836f2d3ycb38a90ece2c4364@mail.gmail.com>

hi all,
i writing keypad driver on

*mx21 ads board  for
* kernel 2.6.14

i got a problem on interrupt handling ,

the isr routine for kpp

1.when interrupt occur first i disable interrupt by clear KRIE and KDIE bit

2.next i scan key pad matrix

3.clear KPDK bit  (but when i read this bit i can see that KPDK flag
bit is still not cleared)

4.then i enable KDIE bit again

all above 1,2,3,4 written within interrupt handler (is this a problem?);

my problem is KPP interrupt handler run over and over again after once
i touch a key and release it
please help
thanks

dilan

           reply	other threads:[~2006-11-22  5:15 UTC|newest]

Thread overview: expand[flat|nested]  mbox.gz  Atom feed
 [parent not found: <e65b9ae80611212102x2836f2d3ycb38a90ece2c4364@mail.gmail.com>]

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