Hello,
I had no problem in using request_irq() for MPC8272 with arch=ppc from Montavista Linux
But I have failure for MPC8313 with arch=powerpc from FreeScale LTIB Linux with error code -38
I found its header file mpc83xx.h under include/asm-ppc, while it's supposed to be under include/asm-powerpc.
I did try to copy the header file to directory asm-powerpc
From MPC8313 datasheet, I have
GPIO_IRQ = 74
and I use
DEVICE_NAME = "ppc"
IRQ_FLAG = IRQF_SHARED // use new flag
here my function call
request_irq (GPIO_IRQ,
ppc_ISR,
IRQ_FLAG,
DEVICE_NAME,
NULL);
I'd appreciate any help on this problem.
Best Regards,
Duy-Kyng
Hi Nguyen,
If current PowerPC linux is using the virq to request_irq,
you need do the irq_of_parse_and_map(np, 0) to get the virq.
like.
virq = irq_of_parse_and_map(np, 0)
request_irq(virq,...);
Hope it can help you.
Thanks,
Dave
________________________________
From: linuxppc-embedded-bounces+daveliu=freescale.com@ozlabs.org [mailto:linuxppc-embedded-bounces+daveliu=freescale.com@ozlabs.org] On Behalf Of Duy-Ky Nguyen
Sent: 2008?7?16? 8:59 AM
To: linuxppc-embedded@ozlabs.org
Subject: Failure of request_irq() for MPC8313 using arch=powerpc
Hello,
I had no problem in using request_irq() for MPC8272 with arch=ppc from Montavista Linux
But I have failure for MPC8313 with arch=powerpc from FreeScale LTIB Linux with error code -38
I found its header file mpc83xx.h under include/asm-ppc, while it's supposed to be under include/asm-powerpc.
I did try to copy the header file to directory asm-powerpc
From MPC8313 datasheet, I have
GPIO_IRQ = 74
and I use
DEVICE_NAME = "ppc"
IRQ_FLAG = IRQF_SHARED // use new flag
here my function call
request_irq (GPIO_IRQ,
ppc_ISR,
IRQ_FLAG,
DEVICE_NAME,
NULL);
I'd appreciate any help on this problem.
Best Regards,
Duy-Kyng
Hi Dave,
I've just tried it and it failed.
Before I had tried using the function
int virq = of_irq_to_resource(GPIO_IRQ, 0, NULL);
and it failed the same way
I call request_irq() in the operation init and open, it behaves the same
I greatky appreciate your help, Dave.
Best Regards,
Duy-Ky
//////////////////////////////////////////////////////////////////////////
// Start of capture
Unable to handle kernel paging request for data at address 0x0000005e
Faulting instruction address: 0xc000d1e8
Oops: Kernel access of bad area, sig: 11 [#1]
Modules linked in: ppc_drv
NIP: C000D1E8 LR: C000D274 CTR: C0006088
REGS: c7883d20 TRAP: 0300 Not tainted (2.6.20)
MSR: 00009032 <EE,ME,IR,DR> CR: 22000448 XER: 00000000
DAR: 0000005E, DSISR: 20000000
TASK = c053a810[767] 'rrgg' THREAD: c7882000
GPR00: C000D274 C7883DD0 C053A810 0000004A C0282BA8 C7883E08 C7FD9440 C0273EEC
GPR08: 00000000 00000000 00000100 C0006088 22000448 10018D00 07FFD000 28000422
GPR16: 10090000 100B0000 100B7328 00000000 00000000 00000000 100C8968 100C89A8
GPR24: 100BDFE8 00000000 00000000 C7FD9440 FFFFFFEA C7883E08 C0282BA8 0000004A
Call Trace:
[C7883DD0] [C7FD5EE8] (unreliable)
[C7883DF0] [C000D274]
[C7883E00] [C0009FC8]
[C7883E30] [C000609C]
[C7883E60] [C9072030]
[C7883E70] [C0063E5C]
[C7883EA0] [C005FFAC]
[C7883EC0] [C0060244]
[C7883F20] [C00602B8]
[C7883F40] [C000F540]
--- Exception: c01Instruction dump:
409effc8 80030024 900b0020 4e800020 7d800026 9421ffe0 7c0802a6 bfa10014
7c9e2378 7cbd2b78 91810010 90010024 <83e30014> 2f9f0000 419e0028 2e050000
Segmentation fault
// End of Capture
----- Original Message -----
From: Liu Dave
To: Duy-Ky Nguyen ; linuxppc-embedded@ozlabs.org
Sent: Tuesday, July 15, 2008 7:09 PM
Subject: RE: Failure of request_irq() for MPC8313 using arch=powerpc
Hi Nguyen,
If current PowerPC linux is using the virq to request_irq,
you need do the irq_of_parse_and_map(np, 0) to get the virq.
like.
virq = irq_of_parse_and_map(np, 0)
request_irq(virq,...);
Hope it can help you.
Thanks,
Dave
----------------------------------------------------------------------------
From: linuxppc-embedded-bounces+daveliu=freescale.com@ozlabs.org [mailto:linuxppc-embedded-bounces+daveliu=freescale.com@ozlabs.org] On Behalf Of Duy-Ky Nguyen
Sent: 2008年7月16日 8:59 AM
To: linuxppc-embedded@ozlabs.org
Subject: Failure of request_irq() for MPC8313 using arch=powerpc
Hello,
I had no problem in using request_irq() for MPC8272 with arch=ppc from Montavista Linux
But I have failure for MPC8313 with arch=powerpc from FreeScale LTIB Linux with error code -38
I found its header file mpc83xx.h under include/asm-ppc, while it's supposed to be under include/asm-powerpc.
I did try to copy the header file to directory asm-powerpc
From MPC8313 datasheet, I have
GPIO_IRQ = 74
and I use
DEVICE_NAME = "ppc"
IRQ_FLAG = IRQF_SHARED // use new flag
here my function call
request_irq (GPIO_IRQ,
ppc_ISR,
IRQ_FLAG,
DEVICE_NAME,
NULL);
I'd appreciate any help on this problem.
Best Regards,
Duy-Kyng
Hello Scott,
I forgot to mention that I have less error if I use the existing device node
"spi" in the DTS file
# Start of error capture
Got device node from device tree
Got Virtual IRQ
PPC : interrupt hook failed (-22)
# End of capture
So it's able to access the device node and to map "virq" while I had total
failure in using "gpio" I put into DTS
I must make mistake in creating the node "gpio" in the DTS file
I'm using FreeScale Eva board MPC8313ERDB
Thanks,
Duy-Ky
----- Original Message -----
From: "Scott Wood" <redacted>
To: "Duy-Ky Nguyen" <redacted>
Cc: "Liu Dave" <redacted>; <redacted>
Sent: Tuesday, July 22, 2008 10:55 AM
Subject: Re: Failure of request_irq() for MPC8313 using arch=powerpc
On Tue, Jul 15, 2008 at 08:43:59PM -0700, Duy-Ky Nguyen wrote:
quoted
Hi Dave,
I've just tried it and it failed.
Could you elaborate on exactly what you tried? Did you pass the GPIO
device
tree node?
quoted
Before I had tried using the function
int virq = of_irq_to_resource(GPIO_IRQ, 0, NULL);
and it failed the same way
The first argument of of_irq_to_resource is a device node pointer, not an
IRQ number. Surely the compiler warned you about this.
-Scott