Hi,
I am working on a MPC5200-based board. There is a dual port RAM connected to
the MPC5200 via the localbus. In my setup one can raise an interrupt at the
MPC5200 to signal new that new data has arrived in the dual port RAM. I have
already found out that the interrupt delivery actually works (do_IRQ gets
called when raising the interrupt).
My problem is that my driver (kernel 2.6.24) can not register for the
interrupt. Each time I call request_irq I get -ENOSYS. I am suspecting that I
have done something wrong in my dts defining the dual port RAM. I have defined
the device as follows
localbus {
compatible = "fsl,orion-localbus",
"fsl,mpc5200-localbus",
"fsl,pq2-localbus";
#address-cells = <2>;
#size-cells = <1>;
reg = <f0010100 40>;
ranges = <0 0 fe000000 00400000>;
dp...@40000000 {
device_type = "dpram";
interrupts = <0 0 0>;
interrupt-parent = <&mpc5200_pic>;
};
};
What am I doing wrong? What am I missing?
Thanks,
Matthias Lange.
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