Add a wrapper to class_find_device() to search for a device by the ACPI COMPANION device, reusing the generic match function.
Cc: Greg Kroah-Hartman <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Signed-off-by: Suzuki K Poulose <[email protected]> --- include/linux/device.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index 2effcc2..b1b8c90 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -534,6 +534,27 @@ static inline struct device *class_find_device_by_devt(struct class *class, return class_find_device(class, NULL, &devt, device_match_devt); } +#ifdef CONFIG_ACPI +struct acpi_device; +/** + * class_find_device_by_acpi_dev : device iterator for locating a particular + * device matching the ACPI_COMPANION device. + * @class: class type + * @adev: ACPI_COMPANION device to match. + */ +static inline struct device * +class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev) +{ + return class_find_device(class, NULL, adev, device_match_acpi_dev); +} +#else +static inline struct device * +class_find_device_by_acpi_dev(struct class *class, const void *adev) +{ + return NULL; +} +#endif + struct class_attribute { struct attribute attr; ssize_t (*show)(struct class *class, struct class_attribute *attr, -- 2.7.4
