Question

我愿将IRQ的手稿登记在军械64 支气管模块中,舱面为5.4.0,我使用<代码>request_irq,并登记。但是,当IRQ发生时,斜线报告。收到的意外中断! 因此,我不知道如何解决这一问题。


I m trying to use request_irq to register an IRQ handler in arm64 Linux ko:
    err = request_irq(40, irq_handler, IRQF_SHARED, "hvisor", &hvisor_misc_dev);

并且没有错误。 但是,当我把IRQ40从第2条到第1条时,LC报告的信息是:
[   87.294702] Unexpected interrupt received!
[   87.295733] WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3.c:650 gic_handle_irq+0x124/0x158

Why would this happen and how can I solve it? Who can help me, thanks a lot!

Answer 1

我找到了解决办法。这里必须添加一种 like器,如:

    xxx {
        compatible = "xxx";
        interrupts = <0x00 0x?? 0x01>;
    };

什么地方? 它是在下限32之后的ir。然后,在海尔科,我们必须利用以下功能检索海尔克号:of_find_node_by_path和of_irq_get。类似:

    struct device_node *node = NULL;
    node = of_find_node_by_path("/xxx");
    int irq = of_irq_get(node, 0);
    request_irq(irq, ....);

Then everything is okey!

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