request_irq fails to get interrupt 12

request_irq fails to get interrupt 12

[Alan Bennett]

Freescale experts.  Why on earth can't I request the IRQ for Timer1?

static int __init
dvr_ph_init(void)
{
	u32	rv;
	int k;
	//rv = driver_register(&dvr_ph_driver);
	for (k=0;k<64;k++) {
		rv = request_irq(k,dvrph_isr , 0, "dvr_ph", NULL);
		if (rv!=-38) printkplus("request_irq for %d returns %d", k,rv);
	}
	return rv;
}

Results in:
dvr_ph_init    145 - enter the routine
dvr_ph_init    155 -
dvr_ph_init    161 - request_irq for 16 returns -16  (vector 16 = TMCNT)
dvr_ph_init    161 - request_irq for 32 returns 0  (vector 32 = FCC1)
dvr_ph_init    161 - request_irq for 33 returns -16  (vector 33 = FCC2)
dvr_ph_init    161 - request_irq for 40 returns 0  (vector 40 = SCC1)
dvr_ph_init    161 - request_irq for 43 returns 0  (vector 43 = SCC4)

Re: request_irq fails to get interrupt 12

[S. Fricke]

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Hello,

> Freescale experts.  Why on earth can't I request the IRQ for Timer1?

Please consule my question on [1] and the answers.

[1] http://ozlabs.org/pipermail/linuxppc-dev/2007-September/042061.html

bye
Silvio Fricke

-- 
-- S. Fricke ----------------------------- MAILTO:silvio.fricke@gmail.com --
   Diplom-Informatiker (FH)
   Linux-Entwicklung
----------------------------------------------------------------------------


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Re: request_irq fails to get interrupt 12

[Alan Bennett]

Ok, so what does it take to expose an interrupt vector on a pq2 PIC??
-Alan

Current:
        /
              localbus{
        ...
 	       fundevice1 {
		       interrupts = <c 8>;
		       interrupt-parent = <&PIC>;
	       };
          ...
               soc@e0000000 {
                      PIC: interrupt-controller@10c00 {
                          #interrupt-cells = <2>;
                          interrupt-controller;
                          reg = <10c00 80>;
                          compatible = "fsl,mpc8248-pic", "fsl,pq2-pic";
                        };
Is the above device tree enough on its own?
Do I have to write some platform code beyond:
  static void __init ep8248_pic_init(void)
  {
	struct device_node *np = of_find_compatible_node(NULL,   NULL, "fsl,pq2-pic");
	if (!np) {
		printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
		return;
	}

	cpm2_pic_init(np);
	of_node_put(np);
}

-Alan

Hello,

> Freescale experts.  Why on earth can't I request the IRQ for Timer1?

Please consule my question on [1] and the answers.

[1] http://ozlabs.org/pipermail/linuxppc-dev/2007-September/042061.html

bye
Silvio Fricke

--
-- S. Fricke ----------------------------- MAILTO:silvio.fricke@gmail.com --
   Diplom-Informatiker (FH)
   Linux-Entwicklung
----------------------------------------------------------------------------

Re: request_irq fails to get interrupt 12

[Benjamin Herrenschmidt]

On Mon, 2007-10-22 at 13:55 -0600, Alan Bennett wrote:
> Ok, so what does it take to expose an interrupt vector on a pq2 PIC??
> -Alan

Also, if it's the default PIC or if you happen to have the PIC struct
irq_host pointer at hand, a quickish way for internal device interrupts
is to directly call irq_create_mapping() though using the device-tree is
nicer.

Ben.

> Current:
>         /
>               localbus{
>         ...
>  	       fundevice1 {
> 		       interrupts = <c 8>;
> 		       interrupt-parent = <&PIC>;
> 	       };
>           ...
>                soc@e0000000 {
>                       PIC: interrupt-controller@10c00 {
>                           #interrupt-cells = <2>;
>                           interrupt-controller;
>                           reg = <10c00 80>;
>                           compatible = "fsl,mpc8248-pic", "fsl,pq2-pic";
>                         };
> Is the above device tree enough on its own?
> Do I have to write some platform code beyond:
>   static void __init ep8248_pic_init(void)
>   {
> 	struct device_node *np = of_find_compatible_node(NULL,   NULL, "fsl,pq2-pic");
> 	if (!np) {
> 		printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
> 		return;
> 	}
> 
> 	cpm2_pic_init(np);
> 	of_node_put(np);
> }
> 
> -Alan
> 
> Hello,
> 
> > Freescale experts.  Why on earth can't I request the IRQ for Timer1?
> 
> Please consule my question on [1] and the answers.
> 
> [1] http://ozlabs.org/pipermail/linuxppc-dev/2007-September/042061.html
> 
> bye
> Silvio Fricke
> 
> --
> -- S. Fricke ----------------------------- MAILTO:silvio.fricke@gmail.com --
>    Diplom-Informatiker (FH)
>    Linux-Entwicklung
> ----------------------------------------------------------------------------
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