SPI and I2C slaves are enumerated by their respective parents rather than the ACPI core. They are recognized by presence of _CRS resources, which however are missing on Macs. Check for presence of device properties instead. Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Cc: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Cc: Federico Lorenzi <florenzi@xxxxxxxxx> Reported-and-tested-by: Ronald Tschalär <ronald@xxxxxxxxxxxxx> Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx> --- Changes v1 -> v2: - Newly inserted patch in v2 to fix an enumeration issue. (Ronald) drivers/acpi/scan.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index d4ff2cd1f738..c565e74bd2dd 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1444,6 +1444,12 @@ static bool acpi_is_spi_i2c_slave(struct acpi_device *device) struct list_head resource_list; bool is_spi_i2c_slave = false; + /* Macs use device properties in lieu of _CRS resources */ + if (IS_ENABLED(CONFIG_X86) && dmi_match(DMI_SYS_VENDOR, "Apple Inc.") && + (device_property_present(&device->dev, "spiSclkPeriod") || + device_property_present(&device->dev, "i2cAddress"))) + return true; + INIT_LIST_HEAD(&resource_list); acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, &is_spi_i2c_slave); -- 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
