Messages in this thread | | | Date | Thu, 05 Dec 2013 22:01:28 +0800 | From | Hanjun Guo <> | Subject | Re: [RFC part2 PATCH 8/9] ACPI / ARM64: Update acpi_register_gsi to register with the core IRQ subsystem |
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On 2013年12月05日 11:48, Arnd Bergmann wrote: > On Tuesday 03 December 2013, Hanjun Guo wrote: >> + /* >> + * ACPI have no bindings to indicate SPI or PPI, so we >> + * use different mappings from DT in ACPI. >> + * >> + * For FDT >> + * PPI interrupt: in the range [0, 15]; >> + * SPI interrupt: in the range [0, 987]; >> + * >> + * For ACPI, using identity mapping for hwirq: >> + * PPI interrupt: in the range [16, 31]; >> + * SPI interrupt: in the range [32, 1019]; > This difference might cause endless confusion. Can't you register PPI and SPI as > separate IRQ controllers to have the same number space that we normally have?
In ACPI, they used a conception named GSI (Global System Interrupts) for irq, GSI number can not be the same even if there are muti GICs, so I use the identity mapping for hwirq for ACPI.
Thanks you very much for your comments :)
Hanjun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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