On 2013?12?05? 11:48, Arnd Bergmann wrote:

On Tuesday 03 December 2013, Hanjun Guo wrote:

quoted

+       /*
+        * 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