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| author | Lukas Wunner <lukas@wunner.de> | 2015-11-25 21:19:55 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-09 01:31:41 +0100 |
| commit | 2d12b6b381ba059d5f92798f5ea739672a2f5fcf (patch) | |
| tree | 43b44ae5508885d7170fc074d394f9e4aad7ca0b /drivers/acpi/internal.h | |
| parent | ACPI / scan: Fix acpi_bus_id_list bookkeeping (diff) | |
| download | linux-2d12b6b381ba059d5f92798f5ea739672a2f5fcf.tar.xz linux-2d12b6b381ba059d5f92798f5ea739672a2f5fcf.zip | |
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.h | 8 |
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, |