ACPI: Introduce helper function acpi_dev_filter_resource_type()

[deliverable/linux.git] / drivers / acpi / resource.c

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 1c3abae6f2fa6d7c6ccda2b47d2c19a08e103168..3ea0d17eb95178474b0e231af3ad3e4b25d166e3 100644 (file)
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -569,3 +569,58 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
        return c.count;
 }
 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
+
+/**
+ * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
+ *                                types
+ * @ares: Input ACPI resource object.
+ * @types: Valid resource types of IORESOURCE_XXX
+ *
+ * This is a hepler function to support acpi_dev_get_resources(), which filters
+ * ACPI resource objects according to resource types.
+ */
+int acpi_dev_filter_resource_type(struct acpi_resource *ares,
+                                 unsigned long types)
+{
+       unsigned long type = 0;
+
+       switch (ares->type) {
+       case ACPI_RESOURCE_TYPE_MEMORY24:
+       case ACPI_RESOURCE_TYPE_MEMORY32:
+       case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+               type = IORESOURCE_MEM;
+               break;
+       case ACPI_RESOURCE_TYPE_IO:
+       case ACPI_RESOURCE_TYPE_FIXED_IO:
+               type = IORESOURCE_IO;
+               break;
+       case ACPI_RESOURCE_TYPE_IRQ:
+       case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+               type = IORESOURCE_IRQ;
+               break;
+       case ACPI_RESOURCE_TYPE_DMA:
+       case ACPI_RESOURCE_TYPE_FIXED_DMA:
+               type = IORESOURCE_DMA;
+               break;
+       case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+               type = IORESOURCE_REG;
+               break;
+       case ACPI_RESOURCE_TYPE_ADDRESS16:
+       case ACPI_RESOURCE_TYPE_ADDRESS32:
+       case ACPI_RESOURCE_TYPE_ADDRESS64:
+       case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+               if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
+                       type = IORESOURCE_MEM;
+               else if (ares->data.address.resource_type == ACPI_IO_RANGE)
+                       type = IORESOURCE_IO;
+               else if (ares->data.address.resource_type ==
+                        ACPI_BUS_NUMBER_RANGE)
+                       type = IORESOURCE_BUS;
+               break;
+       default:
+               break;
+       }
+
+       return (type & types) ? 0 : 1;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);