net: wan: framer: constify of_phandle_args in xlate

The xlate callbacks are supposed to translate of_phandle_args to proper
provider without modifying the of_phandle_args.  Make the argument
pointer to const for code safety and readability.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240217100306.86740-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wan/framer/framer-core.c

@@ -384,7 +384,7 @@ static struct framer_provider *framer_provider_of_lookup(const struct device_nod
 	return ERR_PTR(-EPROBE_DEFER);
 }
 
-static struct framer *framer_of_get_from_provider(struct of_phandle_args *args)
+static struct framer *framer_of_get_from_provider(const struct of_phandle_args *args)
 {
 	struct framer_provider *framer_provider;
 	struct framer *framer;
@@ -735,7 +735,8 @@ EXPORT_SYMBOL_GPL(devm_framer_create);
  * should provide a custom of_xlate function that reads the *args* and returns
  * the appropriate framer.
  */
-struct framer *framer_provider_simple_of_xlate(struct device *dev, struct of_phandle_args *args)
+struct framer *framer_provider_simple_of_xlate(struct device *dev,
+					       const struct of_phandle_args *args)
 {
 	struct class_dev_iter iter;
 	struct framer *framer;
@@ -768,7 +769,7 @@ EXPORT_SYMBOL_GPL(framer_provider_simple_of_xlate);
 struct framer_provider *
 __framer_provider_of_register(struct device *dev, struct module *owner,
 			      struct framer *(*of_xlate)(struct device *dev,
-							 struct of_phandle_args *args))
+							 const struct of_phandle_args *args))
 {
 	struct framer_provider *framer_provider;
 
@@ -830,7 +831,7 @@ static void devm_framer_provider_of_unregister(struct device *dev, void *res)
 struct framer_provider *
 __devm_framer_provider_of_register(struct device *dev, struct module *owner,
 				   struct framer *(*of_xlate)(struct device *dev,
-							      struct of_phandle_args *args))
+							      const struct of_phandle_args *args))
 {
 	struct framer_provider **ptr, *framer_provider;
 

include/linux/framer/framer-provider.h

@@ -93,7 +93,7 @@ struct framer_provider {
 	struct module		*owner;
 	struct list_head	list;
 	struct framer * (*of_xlate)(struct device *dev,
-				    struct of_phandle_args *args);
+				    const struct of_phandle_args *args);
 };
 
 static inline void framer_set_drvdata(struct framer *framer, void *data)
@@ -118,19 +118,19 @@ struct framer *devm_framer_create(struct device *dev, struct device_node *node,
 				  const struct framer_ops *ops);
 
 struct framer *framer_provider_simple_of_xlate(struct device *dev,
-					       struct of_phandle_args *args);
+					       const struct of_phandle_args *args);
 
 struct framer_provider *
 __framer_provider_of_register(struct device *dev, struct module *owner,
 			      struct framer *(*of_xlate)(struct device *dev,
-							 struct of_phandle_args *args));
+							 const struct of_phandle_args *args));
 
 void framer_provider_of_unregister(struct framer_provider *framer_provider);
 
 struct framer_provider *
 __devm_framer_provider_of_register(struct device *dev, struct module *owner,
 				   struct framer *(*of_xlate)(struct device *dev,
-							      struct of_phandle_args *args));
+							      const struct of_phandle_args *args));
 
 void framer_notify_status_change(struct framer *framer);
 
@@ -154,7 +154,7 @@ static inline struct framer *devm_framer_create(struct device *dev, struct devic
 }
 
 static inline struct framer *framer_provider_simple_of_xlate(struct device *dev,
-							     struct of_phandle_args *args)
+							     const struct of_phandle_args *args)
 {
 	return ERR_PTR(-ENOSYS);
 }
@@ -162,7 +162,7 @@ static inline struct framer *framer_provider_simple_of_xlate(struct device *dev,
 static inline struct framer_provider *
 __framer_provider_of_register(struct device *dev, struct module *owner,
 			      struct framer *(*of_xlate)(struct device *dev,
-							 struct of_phandle_args *args))
+							 const struct of_phandle_args *args))
 {
 	return ERR_PTR(-ENOSYS);
 }
@@ -174,7 +174,7 @@ void framer_provider_of_unregister(struct framer_provider *framer_provider)
 static inline struct framer_provider *
 __devm_framer_provider_of_register(struct device *dev, struct module *owner,
 				   struct framer *(*of_xlate)(struct device *dev,
-							      struct of_phandle_args *args))
+							      const struct of_phandle_args *args))
 {
 	return ERR_PTR(-ENOSYS);
 }