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ACPI: resource: Add helper function acpi_dev_get_memory_resources()

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Wrapper function that finds all memory type resources by
using acpi_dev_get_resources(). It removes the need for the
drivers to check the resource data type separately.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Heikki Krogerus 2022-08-16 13:16:26 +03:00 committed by Rafael J. Wysocki
parent 6d2b5a1cf4
commit 6bb057bfd9
2 changed files with 18 additions and 0 deletions
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17
drivers/acpi/resource.c
View File

@ -721,6 +721,23 @@ int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
}
EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
/**
* acpi_dev_get_memory_resources - Get current memory resources of a device.
* @adev: ACPI device node to get the resources for.
* @list: Head of the resultant list of resources (must be empty).
*
* This is a helper function that locates all memory type resources of @adev
* with acpi_dev_get_resources().
*
* The number of resources in the output list is returned on success, an error
* code reflecting the error condition is returned otherwise.
*/
int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
{
return acpi_dev_get_resources(adev, list, is_memory, NULL);
}
EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
/**
* acpi_dev_filter_resource_type - Filter ACPI resource according to resource
* types

1
include/linux/acpi.h
View File

@ -506,6 +506,7 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
void *preproc_data);
int acpi_dev_get_dma_resources(struct acpi_device *adev,
struct list_head *list);
int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list);
int acpi_dev_filter_resource_type(struct acpi_resource *ares,
unsigned long types);