Hi：
Dear sir. We are using B4860qds. Now we want to update the SDK from SDK1.6 to SDK2.0. In the SDK1.6 version we use the MPIC Core 0 to interrupt. When DSP writes 1 to the MPIC_IPIDR3 register, an interrupt occurs to linux kernel.The irq requested as follows:
#define IPID3_IRQ_NUM 510
np = of_find_node_by_name(NULL, "pic");
irqhost = irq_find_host(np);
vipi = irq_find_mapping(irqhost, IPID3_IRQ_NUM);
if (NO_IRQ == vipi) {
vipi = irq_create_mapping(irqhost, IPID3_IRQ_NUM);
}
request_irq(IPID3_IRQ_NUM, follow_dsp_isr, IRQF_NO_SUSPEND, "follow_dsp_isr", NULL);
It works well on SDK1.6.
When we use the same code on SDK2.0,the problem occurs.After irq requests,we use “cat /proc/intterupts”to find as follows:
510: 0 0 0 0 0 0 0 0 OpenPIC 510 Edge dsp_isr
When DSP writes 1 to the MPIC_IPIDR3 register,linux kernel can no longer receive interrupts.
So I'd like to ask you a question. If we don’t use device tree,how do I calculate the irq number? And is anyting different between SDK1.6 and SDK2.0 in the irq registration?
