ACPI / scan: Recognize Apple SPI and I2C slaves

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. Reported-and-tested-by: Ronald Tschalär <ronald@innovation.ch> Signed-off-by: Lukas Wunner <lukas@wunner.de> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: l1k

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);