[v2,02/32] driver core: Introduce device_match_type() to match device with a device type

Commit Message

Zijun Hu Dec. 3, 2024, 12:33 a.m. UTC

From: Zijun Hu <[e-mail]>

Introduce device_match_type() to simplify operations below:

- Test if a device matches with specified device type.
- Find a device with specified device type via various device finding APIs.

device_find_child() will use it as argument to simplify operations later.

Signed-off-by: Zijun Hu <[e-mail]>
---
 drivers/base/core.c        | 6 ++++++
 include/linux/device/bus.h | 1 +
 2 files changed, 7 insertions(+)

Patch

diff --git a/drivers/base/core.c b/drivers/base/core.c
index a122ea1d84a3b08fce16dd1abdfa7746d31dc430..5bda2edcd83149decd50bb5e9a0ed4267b1f8f6c 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -5239,6 +5239,12 @@  int device_match_name(struct device *dev, const void *name)
 }
 EXPORT_SYMBOL_GPL(device_match_name);
 
+int device_match_type(struct device *dev, const void *type)
+{
+	return dev->type == type;
+}
+EXPORT_SYMBOL_GPL(device_match_type);
+
 int device_match_of_node(struct device *dev, const void *np)
 {
 	return dev->of_node == np;
diff --git a/include/linux/device/bus.h b/include/linux/device/bus.h
index cdc4757217f9bb4b36b5c3b8a48bab45737e44c5..bc3fd74bb763e6d2d862859bd2ec3f0d443f2d7a 100644
--- a/include/linux/device/bus.h
+++ b/include/linux/device/bus.h
@@ -131,6 +131,7 @@  typedef int (*device_match_t)(struct device *dev, const void *data);
 
 /* Generic device matching functions that all busses can use to match with */
 int device_match_name(struct device *dev, const void *name);
+int device_match_type(struct device *dev, const void *type);
 int device_match_of_node(struct device *dev, const void *np);
 int device_match_fwnode(struct device *dev, const void *fwnode);
 int device_match_devt(struct device *dev, const void *pdevt);