Hi,
I have a custom board that's using powerpc 8544. I am trying to setup the
external interrupts using the device tree and I am having no luck getting
the interrupt. I think my problem is that I don't have the hwirq to virq
mapping correctly. We are using the freescale 8544ds as our base. We have a
PCI bus but we are not using PCIE. In my kernel configuration, I have
CONFIG_PCIEPORTBUS disabled. The PCI interrupt is connected to IRQ0 and it
is working fine. But, my FPGA has three interrupts, IRQ1, IRQ2 and IRQ3. I
configure this in the device tree and I've tried many different numbers for
the interrupt.
In the KConfig for ppc85xx, the configuration is the following
config MPC85xx_DS
bool "Freescale MPC8544 DS"
#select PPC_I8259
select DEFAULT_UIMAGE
select FSL_PCIE
config MPC85xx
bool
select PPC_UDBG_16550
select PPC_INDIRECT_PCI
select FSL_PCIE
select SERIAL_8250_SHARE_IRQ if SERIAL_8250
default y if MPC8540_ADS || MPC85xx_CDS || MPC8560_ADS \
|| MPC85xx_MDS || MPC85xx_DS
My .config has the following configuration for PCI ( I am showing the PCI
configuration b/c 8544 seems to have different interrupt setup when PCIE is
configured)
CONFIG_ZONE_DMA=y
# CONFIG_MPIC_WEIRD is not set
# CONFIG_PPC_I8259 is not set
CONFIG_PPC_INDIRECT_PCI=y
CONFIG_FSL_SOC=y
CONFIG_FSL_PCIE=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_PCI_DEBUG=y
My device tree has the following entry for my fpga:
cpucp...@f0000000{
compatible = "MPC8544DS";
device_type = "CpuCpld";
reg = <f0000000 00000040>;
interrupts = <41 2 42 2 43 2>;
interrupt-parent = <&mpic>;
};
My driver does the mapping to the virq:
np = of_find_node_by_type(NULL, "CpuCpld");
if (!np) {
ret = -ENODEV;
}
cpldCpuDrv->MateIntIrq = irq_of_parse_and_map(np, 0);
cpldCpuDrv->FtaIrq = irq_of_parse_and_map(np, 1);
cpldCpuDrv->ExtractIrq = irq_of_parse_and_map(np, 2);
cpldCpuDrv->XauiIrq = irq_of_parse_and_map(np, 0);
of_node_put(np);
Does anyone know what the virq should be for these external interrupts?
I've tried specifying the actual irq numbers 1,2 and 3 and that doesn't work
either.
Is there some PCI configuration that's getting in the way? I've tried
disabling the FSL_PCIE and I get the same behavior.
Any help or pointers will be appreciated.
Thanks
Nancy
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