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ACPI: utils: Add api to read _SUB from ACPI

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Add a wrapper function to read the _SUB string from ACPI.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20220707151037.3901050-2-sbinding@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Stefan Binding
2022-07-07 16:10:36 +01:00
committed by Mark Brown
parent 7fb72b7bf1
commit 93064e15c8
2 changed files with 44 additions and 0 deletions
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6
include/linux/acpi.h
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@@ -762,6 +762,7 @@ static inline u64 acpi_arch_get_root_pointer(void)
#endif
int acpi_get_local_address(acpi_handle handle, u32 *addr);
const char *acpi_get_subsystem_id(acpi_handle handle);
#else /* !CONFIG_ACPI */
@@ -1023,6 +1024,11 @@ static inline int acpi_get_local_address(acpi_handle handle, u32 *addr)
return -ENODEV;
}
static inline const char *acpi_get_subsystem_id(acpi_handle handle)
{
return ERR_PTR(-ENODEV);
}
static inline int acpi_register_wakeup_handler(int wake_irq,
bool (*wakeup)(void *context), void *context)
{