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| author | Calvin Johnson <calvin.johnson@oss.nxp.com> | 2021-06-11 13:53:56 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-11 23:08:53 +0300 |
| commit | 7ec16433cf1e97cfc823e50e9ee4e2fd3abfc4ee (patch) | |
| tree | 299d86d04da0895a3513fc3305df914bd2db6eea | |
| parent | 8d2cb3ad31181f050af4d46d6854cf332d1207a9 (diff) | |
| download | linux-7ec16433cf1e97cfc823e50e9ee4e2fd3abfc4ee.tar.xz | |
ACPI: utils: Introduce acpi_get_local_address()
Introduce a wrapper around the _ADR evaluation.
Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Grant Likely <grant.likely@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/acpi/utils.c | 14 | ||||
| -rw-r--r-- | include/linux/acpi.h | 7 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index 3b54b8fd7396..e7ddd281afff 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -277,6 +277,20 @@ acpi_evaluate_integer(acpi_handle handle, EXPORT_SYMBOL(acpi_evaluate_integer); +int acpi_get_local_address(acpi_handle handle, u32 *addr) +{ + unsigned long long adr; + acpi_status status; + + status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); + if (ACPI_FAILURE(status)) + return -ENODATA; + + *addr = (u32)adr; + return 0; +} +EXPORT_SYMBOL(acpi_get_local_address); + acpi_status acpi_evaluate_reference(acpi_handle handle, acpi_string pathname, diff --git a/include/linux/acpi.h b/include/linux/acpi.h index c60745f657e9..6ace3a0f1415 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -710,6 +710,8 @@ static inline u64 acpi_arch_get_root_pointer(void) } #endif +int acpi_get_local_address(acpi_handle handle, u32 *addr); + #else /* !CONFIG_ACPI */ #define acpi_disabled 1 @@ -965,6 +967,11 @@ static inline struct acpi_device *acpi_resource_consumer(struct resource *res) return NULL; } +static inline int acpi_get_local_address(acpi_handle handle, u32 *addr) +{ + return -ENODEV; +} + #endif /* !CONFIG_ACPI */ #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC |