Re: [PATCH v3 2/2] ACPI / scan: Fix enumeration for special UART devices

On Wed, Oct 11, 2017 at 10:32:14AM +0200, Frédéric Danis wrote:

UART devices is expected to be enumerated by SerDev subsystem.

During ACPI scan, serial devices behind SPI, I2C or UART buses are not
enumerated, allowing them to be enumerated by their respective parents.

Rename *spi_i2c_slave* to *serial_bus_slave* as this will be used for serial
devices on serial buses (SPI, I2C or UART).

On Macs an empty ResourceTemplate is returned for uart slaves.
Instead the device properties "baud", "parity", "dataBits", "stopBits" are
provided. Add a check for "baud" in acpi_is_serial_bus_slave().

Tested-by: Ronald Tschalär <redacted>
Tested-by: Peter Y. Chuang <redacted>

Ronald and Peter both report success for the above-mentioned Mac-specific
change on GitHub: https://github.com/l1k/linux/pull/1#issuecomment-336126330

Thanks,

Lukas