Thanks Scott,
It is hooked and alive! Your couple of lines guided me through. Here's
the outline of what I did after looking
at other powerpc drivers and the ePAPR document from Power.org:
1. Assumed that MPC83xx_IRQ_EXT1 (0x11 without offset) corresponds to IRQ1.
2. Created a node in my dts that looks like:
[EMAIL PROTECTED] {
device_type = "network";
interrupts = <11 8>;
interrupt-parent = < &ipic >;
}
3. On my kernel device driver I have the following outline:
struct device_node *np;
int irq;
if ((np = of_find_node_by_name(NULL, "mydevice")) == NULL) {
printk(KERN_ERR "Can't find my device node\n");
irq = -1;
}
else
irq = irq_of_parse_and_map(np,0);
4. Ready to use request_irq() on irq!
Thanks,
Oscar
Scott Wood wrote:
On Wed, Sep 03, 2008 at 03:55:41PM -0700, Oscar Takeshita wrote:
I've been trying to hook an IRQ on a modified mpc8349emitx board without
success.
The IRQ is hooked physically to IRQ1/GPIO2[13] on the mpc8349e. No other
devices are
tied to this pin.
I'm using uboot 1.2.0 and kernel 2.6.22.19.
Do I need to have a dts entry for this interrupt in order to make
request_irq() succeed?
How can I find the IRQ number? I tried probe_irq_on/off unfortunately it
did not work.
Would it be MPC83xx_IRQ_EXT1 in arch/powerpc/include/asm/mpc83xx.h ?
I'm new doing kernel work. Any hints appreciated.
You need to describe the IRQ in a device tree node and use
irq_of_parse_and_map(). request_irq() takes virtual IRQ numbers.
Maybe we should put together an arch/powerpc FAQ...
-Scott
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