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ACPI / scan: .match() callback for ACPI scan handlers 

Introduce a .match() callback for ACPI scan handlers to allow them to
use more elaborate matching algorithms if necessary.  That is needed
for the upcoming PNP scan handler in particular.

This change is based on a Zhang Rui's prototype.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
hifive-unleashed-5.1
Rafael J. Wysocki 2014-05-30 04:21:52 +02:00
parent 52d1d0b12b
commit aca0a4eb4e
2 changed files with 4 additions and 0 deletions
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3
drivers/acpi/scan.c
View File

@ -1977,6 +1977,9 @@ static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
{
const struct acpi_device_id *devid;
if (handler->match)
return handler->match(idstr, matchid);
for (devid = handler->ids; devid->id[0]; devid++)
if (!strcmp((char *)devid->id, idstr)) {
if (matchid)

1
include/acpi/acpi_bus.h
View File

@ -131,6 +131,7 @@ static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
struct acpi_scan_handler {
const struct acpi_device_id *ids;
struct list_head list_node;
bool (*match)(char *idstr, const struct acpi_device_id **matchid);
int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
void (*detach)(struct acpi_device *dev);
void (*bind)(struct device *phys_dev);