2010-07-21 21:50:24 BF518 cant use the Edge sensitive interrupt!
zhang zhihua (CHINA)
Message: 91541
Hi,
I want to use BF518's GPIO PH2 to request a interrupt ,I request is like this:
request_irq (IRQF_PH2,my_task,IRQF_TRIGGER_RISING,DEVICE_NAME,NULL);
static irqreturn_t my_task(int irq,void *dev_id)
{
printk("This is my_task!\n");
return IRQ_HANDLED;
}
if give a rising edge to the PH2,enter the "my_task()" founction,but I found it cant go out the intrrupt and the system restart!
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2010-07-21 23:40:59 Re: BF518 cant use the Edge sensitive interrupt!
Sonic Zhang (CHINA)
Message: 91542
What do you mean "it cant go out the intrrupt"? Do you see "This is my_task!" in the console?
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2010-07-22 01:22:03 Re: BF518 cant use the Edge sensitive interrupt!
zhang zhihua (CHINA)
Message: 91543
sonic，你好，
我就是让console在每次进入中断都打印一条信息，但是如果我使用上升沿中断的话每次只要我在PH2口点一个高电平它就不停的打印信息，然后操作系统就重启了，使用高电平中断则不会有这样的问题，当把PH2拉低时就退出中断了！
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2010-07-22 03:43:23 BF518 cant use the Edge sensitive interrupt!
Michael Hennerich (GERMANY)
Message: 91571 EDGE sensitive interrupts must be acknowledged by clearing the latch bit in the GPIO data registers.
This is done automatically be the generic irq layer
- it calls bfin_gpio_ack_irq() (see blackfin/mach-common/ints-priority.c)
Try to modify bfin_gpio_ack_irq() like this to see if it is being called.
#if !defined(CONFIG_BF54x)
static void bfin_gpio_ack_irq(unsigned int irq)
{
/* AFAIK ack_irq in case mask_ack is provided
* get's only called for edge sense irqs
*/
if (irq == IRQ_PH2)
printk("%s: Called gpio = %d\n", irq_to_gpio(irq));
set_gpio_data(irq_to_gpio(irq), 0);
}
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2010-07-22 03:53:58 BF518 cant use the Edge sensitive interrupt!
Michael Hennerich (GERMANY)
Message: 91572 Typo -__func__ arg missing...
if (irq == IRQ_PH2)
printk("%s: Called gpio = %d\n",__func__, irq_to_gpio(irq));
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2010-07-22 04:52:10 Re: BF518 cant use the Edge sensitive interrupt!
zhang zhihua (CHINA)
Message: 91573
Hi,Michael,
It has not been called!
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2010-07-22 05:03:31 Re: BF518 cant use the Edge sensitive interrupt!
Michael Hennerich (GERMANY)
Message: 91574 What kernel (release?, svn?) version are you using?
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2010-07-22 05:29:18 Re: BF518 cant use the Edge sensitive interrupt!
zhang zhihua (CHINA)
Message: 91576
release 2009R1!
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2010-07-22 05:36:13 Re: BF518 cant use the Edge sensitive interrupt!
Michael Hennerich (GERMANY)
Message: 91577 Works for me - see below.
root:/> bfin_gpio_ack_irq: Called gpio = 34
This is my_task!
bfin_gpio_ack_irq: Called gpio = 34
This is my_task!
root:/> version
kernel: Linux release 2.6.28.10-ADI-2009R1.1-svn8988, build #611 Thu Jul 22 11:25:00 CEST 2010
toolchain: bfin-uclinux-gcc release gcc version 4.3.5 (ADI-trunk/svn-4700)
user-dist: release svn-9613, build #286 Thu Jul 22 11:24:40 CEST 2010
root:/> cat /proc/cpuinfo
processor : 0
vendor_id : Analog Devices
cpu family : 0x27e8
model name : ADSP-BF518 400(MHz CCLK) 80(MHz SCLK) (mpu off)
stepping : 0
cpu MHz : 400.000/80.000
bogomips : 796.67
Calibration : 398336000 loops
cache size : 16 KB(L1 icache) 32 KB(L1 dcache-wb) 0 KB(L2 cache)
dbank-A/B : cache/cache
icache setup : 4 Sub-banks/4 Ways, 32 Lines/Way
dcache setup : 2 Super-banks/4 Sub-banks/2 Ways, 64 Lines/Way
board name : ADI BF518F-EZBRD
board memory : 65536 kB (0x00000000 -> 0x04000000)
kernel memory : 64504 kB (0x00001000 -> 0x03eff000)
root:/>
From top of my head I don't know if we fixed a bug related to this on the 2009R1 branch -
I would try to update to branch 2009R1 head.
-Michael
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2010-07-22 20:46:30 Re: BF518 cant use the Edge sensitive interrupt!
zhang zhihua (CHINA)
Message: 91628
Hi,Michael,
root:/> version
kernel: Linux release 2.6.28.10-ADI-2009R1, build #475 Wed Jul 21 19:04:26 PD
T 2010
toolchain: bfin-uclinux-gcc release gcc version 4.1.2 (ADI svn)
user-dist: release 2009R1, build #245 Mon Jul 19 22:05:35 PDT 2010
root:/> cat /proc/cpuinfo
processor : 0
vendor_id : Analog Devices
cpu family : 0x27e8
model name : ADSP-BF518 400(MHz CCLK) 80(MHz SCLK) (mpu off)
stepping : 1
cpu MHz : 400.000/80.000
bogomips : 794.62
Calibration : 397312000 loops
cache size : 16 KB(L1 icache) 32 KB(L1 dcache-wb) 0 KB(L2 cache)
dbank-A/B : cache/cache
icache setup : 4 Sub-banks/4 Ways, 32 Lines/Way
dcache setup : 2 Super-banks/4 Sub-banks/2 Ways, 64 Lines/Way
board name : ADI BF518F-EZBRD
board memory : 32768 kB (0x00000000 -> 0x02000000)
kernel memory : 31736 kB (0x00001000 -> 0x01eff000)