On 01/20/2012 08:37 PM, Terry Fryar wrote:
Ok, I'll try the patch. A question though...on the beagle, there is a OMAP
register GPIO_IRQSTATUSx that I am not manually clearing out. This is the
only place to ack an irq I know of...I assumed that was being handled by the
kernel? Or is this what the patch is adding?? I'm very new to writing irq
handlers, as you can tell!
Honestly, all that's in my current handler is this:
int irqdrv_rtdm_isr(rtdm_irq_t* handle)
{
return(RTDM_IRQ_HANDLED);
}
And here's the register func:
if ((err = rtdm_irq_request(&irqdrv_isr_handle, irqno, irqdrv_rtdm_isr,
RTDM_IRQTYPE_EDGE, IRQDRV_NAME, NULL)) == 0)
rtdm_irq_enable(&irqdrv_isr_handle);
And I'm running against a square waveform and getting this:
[ 56.522948] WARNING: at kernel/softirq.c:137
__local_bh_enable+0x44/0xac()
[ 56.530153] Modules linked in: vme_pd_drv
[ 56.534399] [<c00566fc>] (unwind_backtrace+0x0/0xe0) from [<c007db0c>]
(warn_slowpath_common+0x4c/0x64)
[ 56.574419] [<c007db0c>] (warn_slowpath_common+0x4c/0x64) from
[<c007db3c>] (warn_slowpath_null+0x18/0x1c)
[ 56.584568] [<c007db3c>] (warn_slowpath_null+0x18/0x1c) from [<c0083138>]
(__local_bh_enable+0x44/0xac)
[ 56.594425] [<c0083138>] (__local_bh_enable+0x44/0xac) from [<c008481c>]
(irq_enter+0x44/0x60)
[ 56.623476] [<c008481c>] (irq_enter+0x44/0x60) from [<c0046018>]
(asm_do_IRQ+0x18/0x98)
[ 56.631880] [<c0046018>] (asm_do_IRQ+0x18/0x98) from [<c00b9af0>]
(__ipipe_sync_stage+0x154/0x188)
Make sure to have CONFIG_IPIPE_DEBUG_INTERNAL enabled in your kernel
config btw, this might help.
Gilles, I wonder whether this backtrace could not be the sign of a demux
ISR not going through ipipe_handle_chained_irq()?
-----Original Message-----
From: Gilles Chanteperdrix [mailto:[email protected]]
Sent: Friday, January 20, 2012 12:32 PM
To: Terry Fryar
Cc: [email protected]
Subject: Re: [Xenomai-help] rtdm difficulties
On 01/20/2012 07:24 PM, Terry Fryar wrote:
Yeh, omap and gpio.....edge irq from a square wave pulse....
Try this patch:
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index
30cb7d4..114ccf0 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -1272,7 +1272,7 @@ static void gpio_irq_handler(unsigned int irq, struct
irq_desc *desc)
u32 retrigger = 0;
int unmasked = 0;
- desc->irq_data.chip->irq_ack(&desc->irq_data);
+ desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
bank = get_irq_data(irq);
#ifdef CONFIG_ARCH_OMAP1
--
Philippe.
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