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-rw-r--r--include/linux/spi/spi.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 487da1f6e4b7..86825c88b576 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -867,6 +867,7 @@ extern int devm_spi_register_controller(struct device *dev,
extern void spi_unregister_controller(struct spi_controller *ctlr);
#if IS_ENABLED(CONFIG_ACPI)
+extern struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev);
extern struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr,
struct acpi_device *adev,
int index);