spi: Export acpi_spi_find_controller_by_adev()

Export acpi_spi_find_controller_by_adev() so that ACPI glue code which
wants to dynamically create a spi_device using acpi_spi_device_alloc() or
spi_new_device() on a controller, to which the code does not already have
a reference, can find the controller.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20231014205314.59333-2-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index ac518be34917bf54cca96e3de0ca44374804b7d2..791df0e691054762f139a49df38bb66ea1b14fcf 100644 (file)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2523,8 +2523,6 @@ static void acpi_spi_parse_apple_properties(struct acpi_device *dev,
                lookup->mode |= SPI_CPHA;
 }
 
-static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev);
-
 static int acpi_spi_add_resource(struct acpi_resource *ares, void *data)
 {
        struct acpi_spi_lookup *lookup = data;
@@ -4519,7 +4517,7 @@ static int spi_acpi_controller_match(struct device *dev, const void *data)
        return ACPI_COMPANION(dev->parent) == data;
 }
 
-static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev)
+struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev)
 {
        struct device *dev;
 
@@ -4533,6 +4531,7 @@ static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_devic
 
        return container_of(dev, struct spi_controller, dev);
 }
+EXPORT_SYMBOL_GPL(acpi_spi_find_controller_by_adev);
 
 static struct spi_device *acpi_spi_find_device_by_adev(struct acpi_device *adev)
 {

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 487da1f6e4b70d241ca5069e166ff92327baa186..86825c88b5767a5e6960d89f2a1129189f26d0fd 100644 (file)
--- 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);