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: Federico Lorenzi <[email protected]> Cc: Mika Westerberg <[email protected]> Cc: Andy Shevchenko <[email protected]> Reported-and-tested-by: Ronald Tschalär <[email protected]> Signed-off-by: Lukas Wunner <[email protected]> --- drivers/acpi/scan.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 943536c9a2a8..71a067c412a1 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -13,6 +13,7 @@ #include <linux/dmi.h> #include <linux/nls.h> #include <linux/dma-mapping.h> +#include <linux/platform_data/x86/apple.h> #include <asm/pgtable.h> @@ -1452,6 +1453,12 @@ 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 (x86_apple_machine && + (fwnode_property_present(&device->fwnode, "spiSclkPeriod") || + fwnode_property_present(&device->fwnode, "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
