of: Constify struct device_node function arguments

Functions which don't change the refcount or otherwise modify struct
device_node can make struct device_node const.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241010-dt-const-v1-3-87a51f558425@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

3 files changed, 11 insertions, 11 deletions

diff --git a/include/linux/of.h b/include/linux/of.h
index 85b60ac9eec5..7875b308f13c 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -357,7 +357,7 @@ extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
 extern struct device_node *of_cpu_device_node_get(int cpu);
 extern int of_cpu_node_to_id(struct device_node *np);
 extern struct device_node *of_get_next_cpu_node(struct device_node *prev);
-extern struct device_node *of_get_cpu_state_node(struct device_node *cpu_node,
+extern struct device_node *of_get_cpu_state_node(const struct device_node *cpu_node,
 						 int index);
 extern u64 of_get_cpu_hwid(struct device_node *cpun, unsigned int thread);
 
@@ -395,7 +395,7 @@ extern int of_phandle_iterator_args(struct of_phandle_iterator *it,
 				    int size);
 
 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
-extern int of_alias_get_id(struct device_node *np, const char *stem);
+extern int of_alias_get_id(const struct device_node *np, const char *stem);
 extern int of_alias_get_highest_id(const char *stem);
 
 bool of_machine_compatible_match(const char *const *compats);
@@ -446,9 +446,9 @@ const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
  */
 const char *of_prop_next_string(struct property *prop, const char *cur);
 
-bool of_console_check(struct device_node *dn, char *name, int index);
+bool of_console_check(const struct device_node *dn, char *name, int index);
 
-int of_map_id(struct device_node *np, u32 id,
+int of_map_id(const struct device_node *np, u32 id,
 	       const char *map_name, const char *map_mask_name,
 	       struct device_node **target, u32 *id_out);
 
@@ -871,7 +871,7 @@ static inline void of_property_clear_flag(struct property *p, unsigned long flag
 {
 }
 
-static inline int of_map_id(struct device_node *np, u32 id,
+static inline int of_map_id(const struct device_node *np, u32 id,
 			     const char *map_name, const char *map_mask_name,
 			     struct device_node **target, u32 *id_out)
 {
@@ -1734,7 +1734,7 @@ struct of_overlay_notify_data {
 #ifdef CONFIG_OF_OVERLAY
 
 int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size,
-			 int *ovcs_id, struct device_node *target_base);
+			 int *ovcs_id, const struct device_node *target_base);
 int of_overlay_remove(int *ovcs_id);
 int of_overlay_remove_all(void);
 
@@ -1744,7 +1744,7 @@ int of_overlay_notifier_unregister(struct notifier_block *nb);
 #else
 
 static inline int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size,
-				       int *ovcs_id, struct device_node *target_base)
+				       int *ovcs_id, const struct device_node *target_base)
 {
 	return -ENOTSUPP;
 }
diff --git a/include/linux/of_address.h b/include/linux/of_address.h
index 26a19daf0d09..bd46dbcc6e88 100644
--- a/include/linux/of_address.h
+++ b/include/linux/of_address.h
@@ -83,8 +83,8 @@ extern struct of_pci_range *of_pci_range_parser_one(
 					struct of_pci_range *range);
 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
 				      struct resource *r);
-extern int of_pci_range_to_resource(struct of_pci_range *range,
-				    struct device_node *np,
+extern int of_pci_range_to_resource(const struct of_pci_range *range,
+				    const struct device_node *np,
 				    struct resource *res);
 extern int of_range_to_resource(struct device_node *np, int index,
 				struct resource *res);
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index d6d3eae2f145..6337ad4e5fe8 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -48,12 +48,12 @@ extern int of_irq_to_resource_table(struct device_node *dev,
 		struct resource *res, int nr_irqs);
 extern struct device_node *of_irq_find_parent(struct device_node *child);
 extern struct irq_domain *of_msi_get_domain(struct device *dev,
-					    struct device_node *np,
+					    const struct device_node *np,
 					    enum irq_domain_bus_token token);
 extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
 							u32 id,
 							u32 bus_token);
-extern void of_msi_configure(struct device *dev, struct device_node *np);
+extern void of_msi_configure(struct device *dev, const struct device_node *np);
 u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
 #else
 static inline void of_irq_init(const struct of_device_id *matches)