Hi
i have a FPGA called mcmc which is connected to the powerpc mpc8572 on the
local bus. It provides 2 interrupts which are connected to the
external interupts IRQ1 and IRQ3 of the mpc8572.
the fpga is memory mapped on the local bus at address 0xc0000000
I am able to register the interrupt and obtain virq , but no interrupts.
is the modifications made in the dts file enought/right for getting an
external interrupt??
*The modified dts file for enrm8572*
local...@e0005000 {
#address-cells = <2>;
#size-cells = <1>;
compatible = "fsl,mpc8572-elbc", "fsl,elbc", "simple-bus";
reg = <0xe0005000 0x1000>;
interrupts = <19 2>;
interrupt-parent = <&mpic>;
ranges = <0x0 0x0 0xfc000000 0x04000000
0x1 0x0 0xc0000000 0x00080000
0x2 0x0 0x90100000 0x00008000
0x3 0x0 0x90000000 0x00040000
0x4 0x0 0x91000000 0x00008000>;
n...@3,0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,mpc8572-fcm-nand",
"fsl,elbc-fcm-nand";
reg = <0x3 0x0 0x40000>;
u-b...@0 {
reg = <0x0 0x02000000>;
read-only;
};
jf...@2000000 {
reg = <0x02000000 0x10000000>;
};
ramd...@12000000 {
reg = <0x12000000 0x08000000>;
read-only;
};
ker...@1a000000 {
reg = <0x1a000000 0x04000000>;
};
d...@1e000000 {
reg = <0x1e000000 0x01000000>;
read-only;
};
em...@1f000000 {
reg = <0x1f000000 0x21000000>;
};
};
*m...@1,0 {*
* *
*compatible = "fsl,fpga-pixis";*
* *
*reg = <1 0 32>;*
* *
*interrupts = <1 1 3 1>;*
* *
*interrupt-parent = <&mpic>;*
};
};
*code for registering the interrupt :*
np = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
mcmc_irq = irq;
virq = irq_of_parse_and_map(np, mcmc_irq);
if(virq == NO_IRQ){
printk(KERN_ERR "mcmc: failed to map interrupt");
}
printk(KERN_INFO "mcmc: interrupt mapped to virq %d\n", virq);
ret = request_irq(virq, mcmc_interrupt, IRQF_DISABLED,"mcmc", NULL);
if(ret){
printk(KERN_INFO "mcmc : cant get assigned irq %i\n errno :
<%d>\n",mcmc_irq,ret);
}
else{
printk(KERN_ALERT "Interrupt requested OK\n");
}
d :
*when i register the driver the following output is obtaine*
*for irq=1*
irq_of_parse_and_map
irq : irq_create_mapping(0xc0fffb40,0x1)
irq : using host @ c0fffb40
irq : obtained virq 18
irq : virq=12 <6>mcmc : interrupt mapped to irq 18
Interrupt requested OK!
*for irq=0*
irq_of_parse_and_map
irq : irq_create_mapping(0xc0fffb40,0x3)
irq : using host @ c0fffb40
irq : obtained virq 20
irq : virq=14 <6>mcmc : interrupt mapped to irq 20
Interrupt requested OK!
--
Cheeers
Deebul !!!!!!
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
