Re: [PATCH v16 5/7] spi: pxa2xx: disable DMA for Apple MacBook8,1

[Lukas Wunner]

On Wed, Jul 22, 2026 at 12:09:44AM +0800, Shih-Yuan Lee (FourDollars) wrote:
> This confirms the root cause is not a software IRQ routing issue but
> rather that the DMA controller's interrupt line is physically
> non-functional on this motherboard.

Like Andy says, the DMA controller is internal to the SkyLake-Y-ULX
with SunrisePoint-PCH (Intel 100 Series Chipset), it's not something
that needs to be connected on the mainboard.

I've just looked through the Specification Update for Intel 100 Series
Chipset and it doesn't list DMA-related errata.  Hm...

Lukas