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ACPI: utils: introduce acpi_get_local_u64_address()

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The ACPI _ADR is a 64-bit value. We changed the definitions in commit
ca6f998cf9 ("ACPI: bus: change _ADR representation to 64 bits") but
some helpers still assume the value is a 32-bit value.

This patch adds a new helper to extract the full 64-bits. The existing
32-bit helper is kept for backwards-compatibility and cases where the
_ADR is known to fit in a 32-bit value.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240528192936.16180-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2024-05-28 14:29:33 -05:00 committed by Mark Brown
parent a1708fda93
commit 0b7e448119
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 14 additions and 3 deletions
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16
drivers/acpi/utils.c
View File

@ -277,15 +277,25 @@ acpi_evaluate_integer(acpi_handle handle,
EXPORT_SYMBOL(acpi_evaluate_integer);
int acpi_get_local_address(acpi_handle handle, u32 *addr)
int acpi_get_local_u64_address(acpi_handle handle, u64 *addr)
{
unsigned long long adr;
acpi_status status;
status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, addr);
if (ACPI_FAILURE(status))
return -ENODATA;
return 0;
}
EXPORT_SYMBOL(acpi_get_local_u64_address);
int acpi_get_local_address(acpi_handle handle, u32 *addr)
{
u64 adr;
int ret;
ret = acpi_get_local_u64_address(handle, &adr);
if (ret < 0)
return ret;
*addr = (u32)adr;
return 0;
}

1
include/linux/acpi.h
View File

@ -761,6 +761,7 @@ static inline u64 acpi_arch_get_root_pointer(void)
}
#endif
int acpi_get_local_u64_address(acpi_handle handle, u64 *addr);
int acpi_get_local_address(acpi_handle handle, u32 *addr);
const char *acpi_get_subsystem_id(acpi_handle handle);