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authorLukas Wunner <lukas@wunner.de>2015-11-25 23:19:55 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-12-09 03:31:41 +0300
commit2d12b6b381ba059d5f92798f5ea739672a2f5fcf (patch)
tree43b44ae5508885d7170fc074d394f9e4aad7ca0b /drivers/acpi/internal.h
parentca9dc8d42b30e2d766b471fe5ecf0c71fd309c8f (diff)
downloadlinux-2d12b6b381ba059d5f92798f5ea739672a2f5fcf.tar.xz
ACPI / utils: Add acpi_dev_present()
There's an idiom in use by 7 Linux drivers to detect the presence of a particular ACPI HID by walking the namespace with acpi_get_devices(). The callback passed to acpi_get_devices() is mostly identical across the drivers, leading to lots of duplicate code. Add acpi_dev_present(), the ACPI equivalent to pci_dev_present(), allowing us to deduplicate all that boilerplate in the drivers. Signed-off-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/internal.h')
-rw-r--r--drivers/acpi/internal.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 11d87bf67e73..60bda0d2cf9a 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -86,6 +86,14 @@ bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent);
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
+extern struct list_head acpi_bus_id_list;
+
+struct acpi_device_bus_id{
+ char bus_id[15];
+ unsigned int instance_no;
+ struct list_head node;
+};
+
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *));
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,