usb: typec: retimer: Use device type for matching

Device name is not reliable so using the type instead in
retimer_fwnode_match().

This will also introduce is_typec_retimer() helper, and
remove the static keyword from the retimer device type. That
will make it accessible also in the main typec class.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20221019145552.32493-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/retimer.c b/drivers/usb/typec/retimer.c
index ee94dbb..3a4146e 100644 (file)
--- a/drivers/usb/typec/retimer.c
+++ b/drivers/usb/typec/retimer.c
@@ -17,21 +17,9 @@
 #include "class.h"
 #include "retimer.h"
 
-static bool dev_name_ends_with(struct device *dev, const char *suffix)
-{
-       const char *name = dev_name(dev);
-       const int name_len = strlen(name);
-       const int suffix_len = strlen(suffix);
-
-       if (suffix_len > name_len)
-               return false;
-
-       return strcmp(name + (name_len - suffix_len), suffix) == 0;
-}
-
 static int retimer_fwnode_match(struct device *dev, const void *fwnode)
 {
-       return device_match_fwnode(dev, fwnode) && dev_name_ends_with(dev, "-retimer");
+       return is_typec_retimer(dev) && device_match_fwnode(dev, fwnode);
 }
 
 static void *typec_retimer_match(struct fwnode_handle *fwnode, const char *id, void *data)
@@ -97,7 +85,7 @@ static void typec_retimer_release(struct device *dev)
        kfree(to_typec_retimer(dev));
 }
 
-static const struct device_type typec_retimer_dev_type = {
+const struct device_type typec_retimer_dev_type = {
        .name = "typec_retimer",
        .release = typec_retimer_release,
 };

diff --git a/drivers/usb/typec/retimer.h b/drivers/usb/typec/retimer.h
index fa15951..e34bd23 100644 (file)
--- a/drivers/usb/typec/retimer.h
+++ b/drivers/usb/typec/retimer.h
@@ -12,4 +12,8 @@ struct typec_retimer {
 
 #define to_typec_retimer(_dev_) container_of(_dev_, struct typec_retimer, dev)
 
+const struct device_type typec_retimer_dev_type;
+
+#define is_typec_retimer(dev) ((dev)->type == &typec_retimer_dev_type)
+
 #endif /* __USB_TYPEC_RETIMER__ */