Add a generic helper routine to match the device type of a given device. Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: "Rafael J. Wysocki" <raf...@kernel.org> Cc: Ulf Hansson <ulf.hans...@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com> --- drivers/base/core.c | 6 ++++++ include/linux/device.h | 15 +++++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/drivers/base/core.c b/drivers/base/core.c index 141c4f8..9df812f 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -3340,3 +3340,9 @@ int device_match_fwnode(struct device *dev, void *fwnode) return dev_fwnode(dev) == fwnode; } EXPORT_SYMBOL_GPL(device_match_fwnode); + +int device_match_devt(struct device *dev, void *pdevt) +{ + return dev->devt == *(dev_t *)pdevt; +} +EXPORT_SYMBOL_GPL(device_match_devt); diff --git a/include/linux/device.h b/include/linux/device.h index 54be931..83c0745 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -165,6 +165,7 @@ void subsys_dev_iter_exit(struct subsys_dev_iter *iter); int device_match_of_node(struct device *dev, void *np); int device_match_fwnode(struct device *dev, void *fwnode); +int device_match_devt(struct device *dev, void *pdevt); int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, int (*fn)(struct device *dev, void *data)); @@ -203,6 +204,20 @@ static inline struct device *bus_find_device_by_fwnode(struct bus_type *bus, return bus_find_device(bus, start, fwnode, device_match_fwnode); } +/** + * bus_find_device_by_devt : device iterator for locating a particular device + * matching the device type. + * @bus: bus type + * @start: Device to begin with + * @devt: device type of the device to match. + */ +static inline struct device *bus_find_device_by_devt(struct bus_type *bus, + struct device *start, + dev_t devt) +{ + return bus_find_device(bus, start, &devt, device_match_devt); +} + struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id, struct device *hint); int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, -- 2.7.4