acpi_spi_find_controller_by_adev
controller = acpi_spi_find_controller_by_adev(adev);
ctlr = acpi_spi_find_controller_by_adev(adev);
EXPORT_SYMBOL_GPL(acpi_spi_find_controller_by_adev);
ctlr = acpi_spi_find_controller_by_adev(acpi_dev_parent(adev));
extern struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev);