Commit 7ec16433 authored by Calvin Johnson's avatar Calvin Johnson Committed by David S. Miller
Browse files

ACPI: utils: Introduce acpi_get_local_address() 



Introduce a wrapper around the _ADR evaluation.

Signed-off-by: default avatarCalvin Johnson <calvin.johnson@oss.nxp.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarIoana Ciornei <ioana.ciornei@nxp.com>
Acked-by: default avatarRafael J. Wysocki <rafael@kernel.org>
Acked-by: default avatarGrant Likely <grant.likely@arm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8d2cb3ad

drivers/acpi/utils.c

+14 −0
Original line number Diff line number Diff line
@@ -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,

include/linux/acpi.h

+7 −0
Original line number Diff line number Diff line
@@ -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