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authorLukas Wunner <lukas@wunner.de>2015-11-25 21:19:55 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-12-09 01:31:41 +0100
commit2d12b6b381ba059d5f92798f5ea739672a2f5fcf (patch)
tree43b44ae5508885d7170fc074d394f9e4aad7ca0b /include/acpi
parentca9dc8d42b30e2d766b471fe5ecf0c71fd309c8f (diff)
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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 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index ad0a5ff3d4cd..0fe7babf9c24 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -87,6 +87,8 @@ acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, int rev, int func,
.package.elements = (eles) \
}
+bool acpi_dev_present(const char *hid);
+
#ifdef CONFIG_ACPI
#include <linux/proc_fs.h>