The SD card reader on Macbook Pro 14"/16" and Mac Studio uses yet
another property to override the port's "maximum-link-speed" property.
Add parsing for "expected-link-speed" and always look in the port's
first child for these properties.
Increases the link speed to PCIe 2.0 which is required for the full
bandwidth of SDXC UHS-II.
Signed-off-by: Janne Grunau <j@jannau.net>
The PCIe 4 link speed is only described as "target-link-speed" in the
"lan-10gb". This changed in macos 12.3 or earlier. Verified on Mac
Studio and with the template Mac Mini ADT.
Reported-by: Jeff Geerling <geerlingguy@mac.com>
Signed-off-by: Janne Grunau <j@jannau.net>
This sets both the target and the max link speed of the root ports
to the maximum specified in the ADT.
Signed-off-by: Hector Martin <marcan@marcan.st>
Turns out this isn't hardware-specific, but rather a change Apple made
retroactively in 12.0 RC. Doesn't look like there's a saner way than
this...
Signed-off-by: Hector Martin <marcan@marcan.st>
Minimal initialization of the PCIe hardware such that the tunable
can be applied such that they don't have to be passed along in
the devicetree.
Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
