Invoke an Apple-specific _DSM on ACPI scan, convert the resulting device properties to _DSD format for further consumption by the ACPI core and take advantage of these properties when setting up an SPI slave if _CRS data is empty. The series intends to pave the way for mainlining an out-of-tree driver for the SPI keyboard built into recent MacBooks and MacBook Pros: https://github.com/cb22/macbook12-spi-driver/ It follows up on a discussion on linux-acpi@ in March 2016. This post contained an excerpt of the DSDT of an affected MacBook: https://www.spinics.net/lists/linux-spi/msg06964.html I tested the ACPI patches extensively on my own machine. The SPI patch however needs a Tested-by from one of the developers of the out-of-tree driver (cc: Ronald, Federico). The SPI patch compiles without the ACPI patches, so need not go in through the same tree. Special thanks to Andy Shevchenko for doing some early reviewing of the patches on GitHub. Kind regards, Lukas Lukas Wunner (3): ACPI / property: Don't evaluate objects for devices w/o handle ACPI / property: Support Apple _DSM properties spi: Use Apple device properties in absence of ACPI resources drivers/acpi/property.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++++ drivers/spi/spi.c | 30 ++++++++++++ 2 files changed, 153 insertions(+) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
