>From 72df5d1f51fb27a4ba7f70a3b07df759d32b8288 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@xxxxxxxxx>
Date: Thu, 27 Sep 2012 15:11:55 +0800
Subject: [RFC PATCH 1/6] Introduce acpi_match_device_id().
This API is used to check if a device id string is compatible
with an ACPI device,
either PNP id exported via _HID or compatible ids exported
via _CID control method.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/acpi/scan.c | 22 ++++++++++++++++++++++
include/acpi/acpi_bus.h | 6 ++++++
2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d1ecca2..936a7c9 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -312,6 +312,28 @@ int acpi_match_device_ids(struct acpi_device *device,
}
EXPORT_SYMBOL(acpi_match_device_ids);
+int acpi_match_device_id(const struct device *dev, const char *id)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
+ struct acpi_device *device;
+ struct acpi_hardware_id *hwid;
+ acpi_status status;
+
+ if (!handle || !id)
+ return -ENODEV;
+
+ status = acpi_bus_get_device(handle, &device);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ list_for_each_entry(hwid, &device->pnp.ids, list)
+ if (!strcmp(id, hwid->id))
+ return 0;
+
+ return -ENODEV;
+}
+EXPORT_SYMBOL(acpi_match_device_id);
+
static void acpi_free_ids(struct acpi_device *device)
{
struct acpi_hardware_id *id, *tmp;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index bde976e..8b5b124 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -378,6 +378,7 @@ int acpi_bus_start(struct acpi_device *device);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids);
+int acpi_match_device_id(const struct device *, const char *);
int acpi_create_dir(struct acpi_device *);
void acpi_remove_dir(struct acpi_device *);
@@ -448,6 +449,11 @@ static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
static inline int register_acpi_bus_type(void *bus) { return 0; }
static inline int unregister_acpi_bus_type(void *bus) { return 0; }
+static inline int acpi_match_device_id(const struct device *device,
+ const char *name)
+{
+ return -ENODEV;
+}
#endif /* CONFIG_ACPI */
--
1.7.7.6
--
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