From: Dmytro Bablinyuk <dmytro.bablinyuk@rftechnology.com.au>
To: linuxppc-embedded@ozlabs.org
Subject: Re: MPC8272: Edge triggered IRQ
Date: Tue, 12 Dec 2006 13:48:36 +1100 [thread overview]
Message-ID: <457E1884.6050501@rftechnology.com.au> (raw)
In-Reply-To: <457E0D11.1010802@rftechnology.com.au>
Found solution:
immap->im_intctl.ic_siexr |= (1 << (14 - (irq - SIU_INT_IRQ1)));
Makes it trigger on falling edge
Dmytro Bablinyuk wrote:
> I have pretty simple code that I did a long time ago
>
> irqreturn_t irq_handler(int irq, void *dev_id, struct pt_regs *regs)
> {
> ..
> return IRQ_HANDLED;
> }
>
>
> request_irq(irq,
> &irq_handler,
> SA_INTERRUPT,
> "irq handler",
> NULL);
>
> That code runs on MPC8272 and 2.6.18 kernel.
> It triggers IRQ on low level (I thought it was falling edge by default).
> So, as long as I have input low level I have hundreds of calls. Pretty
> much it keeps calling IRQ handling routine.
> How do I make it to trigger on falling edge?
next prev parent reply other threads:[~2006-12-12 2:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-12 1:59 MPC8272: Edge triggered IRQ Dmytro Bablinyuk
2006-12-12 2:48 ` Dmytro Bablinyuk [this message]
2006-12-12 8:02 ` Laurent Pinchart
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