summaryrefslogtreecommitdiff
path: root/src/include/device_tree.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/include/device_tree.h')
-rw-r--r--src/include/device_tree.h40
1 files changed, 22 insertions, 18 deletions
diff --git a/src/include/device_tree.h b/src/include/device_tree.h
index 4c1a37c00c..14be8322c6 100644
--- a/src/include/device_tree.h
+++ b/src/include/device_tree.h
@@ -50,7 +50,7 @@ struct fdt_header {
struct fdt_property
{
const char *name;
- void *data;
+ const void *data;
uint32_t size;
};
@@ -88,7 +88,7 @@ struct device_tree_reserve_map_entry
struct device_tree
{
- void *header;
+ const void *header;
uint32_t header_size;
struct list_node reserve_map;
@@ -104,17 +104,18 @@ struct device_tree
*/
// Read the property, if any, at offset offset.
-int fdt_next_property(void *blob, uint32_t offset, struct fdt_property *prop);
+int fdt_next_property(const void *blob, uint32_t offset,
+ struct fdt_property *prop);
// Read the name of the node, if any, at offset offset.
-int fdt_node_name(void *blob, uint32_t offset, const char **name);
+int fdt_node_name(const void *blob, uint32_t offset, const char **name);
-void fdt_print_node(void *blob, uint32_t offset);
-int fdt_skip_node(void *blob, uint32_t offset);
+void fdt_print_node(const void *blob, uint32_t offset);
+int fdt_skip_node(const void *blob, uint32_t offset);
// Read a flattened device tree into a heirarchical structure which refers to
// the contents of the flattened tree in place. Modifying the flat tree
// invalidates the unflattened one.
-struct device_tree *fdt_unflatten(void *blob);
+struct device_tree *fdt_unflatten(const void *blob);
@@ -123,12 +124,13 @@ struct device_tree *fdt_unflatten(void *blob);
*/
// Figure out how big a device tree would be if it were flattened.
-uint32_t dt_flat_size(struct device_tree *tree);
+uint32_t dt_flat_size(const struct device_tree *tree);
// Flatten a device tree into the buffer pointed to by dest.
-void dt_flatten(struct device_tree *tree, void *dest);
-void dt_print_node(struct device_tree_node *node);
+void dt_flatten(const struct device_tree *tree, void *dest);
+void dt_print_node(const struct device_tree_node *node);
// Read #address-cells and #size-cells properties from a node.
-void dt_read_cell_props(struct device_tree_node *node, u32 *addrcp, u32 *sizecp);
+void dt_read_cell_props(const struct device_tree_node *node, u32 *addrcp,
+ u32 *sizecp);
// Look up or create a node relative to a parent node, through its path
// represented as an array of strings.
struct device_tree_node *dt_find_node(struct device_tree_node *parent, const char **path,
@@ -148,15 +150,16 @@ struct device_tree_node *dt_find_next_compat_child(struct device_tree_node *pare
struct device_tree_node *dt_find_prop_value(struct device_tree_node *parent, const char *name,
void *data, size_t size);
// Return the phandle
-uint32_t dt_get_phandle(struct device_tree_node *node);
+uint32_t dt_get_phandle(const struct device_tree_node *node);
// Write src into *dest as a 'length'-byte big-endian integer.
void dt_write_int(u8 *dest, u64 src, size_t length);
// Delete a property
void dt_delete_prop(struct device_tree_node *node, const char *name);
// Add different kinds of properties to a node, or update existing ones.
-void dt_add_bin_prop(struct device_tree_node *node, const char *name, void *data,
- size_t size);
-void dt_add_string_prop(struct device_tree_node *node, const char *name, char *str);
+void dt_add_bin_prop(struct device_tree_node *node, const char *name,
+ const void *data, size_t size);
+void dt_add_string_prop(struct device_tree_node *node, const char *name,
+ const char *str);
void dt_add_u32_prop(struct device_tree_node *node, const char *name, u32 val);
void dt_add_u64_prop(struct device_tree_node *node, const char *name, u64 val);
void dt_add_reg_prop(struct device_tree_node *node, u64 *addrs, u64 *sizes,
@@ -164,9 +167,10 @@ void dt_add_reg_prop(struct device_tree_node *node, u64 *addrs, u64 *sizes,
int dt_set_bin_prop_by_path(struct device_tree *tree, const char *path,
void *data, size_t size, int create);
-void dt_find_bin_prop(struct device_tree_node *node, const char *name, void **data,
- size_t *size);
-const char *dt_find_string_prop(struct device_tree_node *node, const char *name);
+void dt_find_bin_prop(const struct device_tree_node *node, const char *name,
+ const void **data, size_t *size);
+const char *dt_find_string_prop(const struct device_tree_node *node,
+ const char *name);
/*
* Fixups to apply to a kernel's device tree before booting it.