acpi_spi_device_alloc
spi_dev = acpi_spi_device_alloc(NULL, adev, i);
EXPORT_SYMBOL_GPL(acpi_spi_device_alloc);
spi = acpi_spi_device_alloc(ctlr, adev, -1);
extern struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr,