Hi all, I've been working on a driver [1] for the SPI touchpad / keyboard found in the new 12" Apple MacBooks. While the driver works OK as a polled device, I can't seem to get interrupts working. I'm requesting an IRQ with: result = request_irq(spi->irq, applespi_irq_handler, IRQF_SHARED, "applespi", applespi); which shows up correctly under /proc/interrupts: 14: 0 0 0 0 IR-IO-APIC 14-fasteoi applespi This is the relevant bit from the DSDT of the SPI slave device (rest of the DSDT at [3]): Interrupt (ResourceConsumer, Level, ActiveLow, Exclusive, ,, ) { 0x0000000E, } However, no amount of pressing keys will cause an interrupt to happen. While I don't fully understand the packets I'm using to initialize the SPI device, they're an exact copy of what the Windows driver uses on bootup, and they get the same response. I am booting the kernel with intremap=nosid,no_x2apic_optout; without nosid it won't boot at all, and without no_x2apic_optout the result is the same. One theory I have is that the IOAPIC is incorrectly configuring the pin (full dmesg [2]): [ 0.034850] IOAPIC[0]: Set routing entry (2-14 -> 0x3e -> IRQ 14 Mode:0 Active:0 Dest:1) [ 0.034857] IOAPIC[2]: Set IRTE entry (P:1 FPD:0 Dst_Mode:1 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:1 Avail:0 Vector:3F Dest:00000001 SID:F0F8 SQ:0 SVT:0) Compared with IRQ 23 (which is the SPI controller): [ 15.245319] IOAPIC[2]: Set IRTE entry (P:1 FPD:0 Dst_Mode:1 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:1 Avail:0 Vector:53 Dest:00000001 SID:F0F8 SQ:0 SVT:0) [ 15.245321] IOAPIC[0]: Set routing entry (2-23 -> 0x53 -> IRQ 23 Mode:1 Active:1 Dest:1) Similarly, this is the DSDT bit for the SPI controller: Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, ) { 0x00000017, } Any suggestions or pointers would be most welcome. Cheers, Federico [1] https://github.com/cb22/macbook12-spi-driver [2] http://paste.ubuntu.com/22851538/ [3] http://paste.ubuntu.com/22851971/