Messages in this thread | | | Date | Wed, 19 Feb 2014 13:07:09 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: Does it need to implement irq_set_type method in the ioapic_chip? |
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On Wed, 19 Feb 2014, carl peng wrote: > At last, the device will be connected to AMBA bus, so the interrupt > pin will be connected to IOAPIC through AMBA bus. The device now > is in the pre-silicon verification stage. > > So my question is the same: > Why does APIC driver not implement the irq_set_type method? if
Because we do not need it. All devices are properly connected and configured by the BIOS and bus discovery.
> implement it, will supply more free space for the device driver > developer(they can set the interrupttrigger mode by calling request_irq).
There are 3 different mechanisms already to tell the kernel to configure a particular irq line: ACPI, MP Tables and SFI.
That's the way x86 does its interrupt configuration and there is no need to provide another one.
Thanks,
tglx
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