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spi: Add dummy definitions for ACPI lookup functions

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Merge series from Richard Fitzgerald <rf@opensource.cirrus.com>:

Provide empty versions of acpi_spi_count_resources(),
acpi_spi_device_alloc() and acpi_spi_find_controller_by_adev()
if the real functions are not being built.

This commit fixes two problems with the original definitions:

1) There wasn't an empty version of these functions
2) The #if only depended on CONFIG_ACPI. But the functions are implemented
   in the core spi.c so CONFIG_SPI_MASTER must also be enabled for the real
   functions to exist.
This commit is contained in:
Mark Brown 2024-08-02 21:53:04 +01:00
commit d196c714a5
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1 changed files with 18 additions and 1 deletions
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19
include/linux/spi/spi.h
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@ -902,12 +902,29 @@ extern int devm_spi_register_controller(struct device *dev,
struct spi_controller *ctlr);
extern void spi_unregister_controller(struct spi_controller *ctlr);
#if IS_ENABLED(CONFIG_ACPI)
#if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SPI_MASTER)
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);
int acpi_spi_count_resources(struct acpi_device *adev);
#else
static inline struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev)
{
return NULL;
}
static inline struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr,
struct acpi_device *adev,
int index)
{
return ERR_PTR(-ENODEV);
}
static inline int acpi_spi_count_resources(struct acpi_device *adev)
{
return 0;
}
#endif
/*