ACPI / scan: Generalize of_compatible matching

Redefine the function used for matching the device's "compatible"
property against a given list of "compatible" strings to take
a pointer to that list instead of a driver object pointer to
make it more general.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 3e5a2768c3b4f343cfc14ef3cba8809ea666aed6..99f97ac64aa48909cf913c0dba7618c9638fe805 100644 (file)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -949,9 +949,17 @@ int acpi_match_device_ids(struct acpi_device *device,
 }
 EXPORT_SYMBOL(acpi_match_device_ids);
 
-/* Performs match against special "PRP0001" shoehorn ACPI ID */
-static bool acpi_of_driver_match_device(struct device *dev,
-                                       const struct device_driver *drv)
+/**
+ * acpi_of_match_device - Match device using the "compatible" property.
+ * @dev: Device to match.
+ * @of_match_table: List of device IDs to match against.
+ *
+ * If @dev has an ACPI companion which has the special PRP0001 device ID in its
+ * list of identifiers and a _DSD object with the "compatible" property, use
+ * that property to match against the given list of identifiers.
+ */
+static bool acpi_of_match_device(struct device *dev,
+                                const struct of_device_id *of_match_table)
 {
        const union acpi_object *of_compatible, *obj;
        struct acpi_device *adev;
@@ -962,7 +970,7 @@ static bool acpi_of_driver_match_device(struct device *dev,
                return false;
 
        of_compatible = adev->data.of_compatible;
-       if (!drv->of_match_table || !of_compatible)
+       if (!of_match_table || !of_compatible)
                return false;
 
        if (of_compatible->type == ACPI_TYPE_PACKAGE) {
@@ -976,7 +984,7 @@ static bool acpi_of_driver_match_device(struct device *dev,
        for (i = 0; i < nval; i++, obj++) {
                const struct of_device_id *id;
 
-               for (id = drv->of_match_table; id->compatible[0]; id++)
+               for (id = of_match_table; id->compatible[0]; id++)
                        if (!strcasecmp(obj->string.pointer, id->compatible))
                                return true;
        }
@@ -988,7 +996,7 @@ bool acpi_driver_match_device(struct device *dev,
                              const struct device_driver *drv)
 {
        if (!drv->acpi_match_table)
-               return acpi_of_driver_match_device(dev, drv);
+               return acpi_of_match_device(dev, drv->of_match_table);
 
        return !!acpi_match_device(drv->acpi_match_table, dev);
 }