diff options
Diffstat (limited to 'include/linux/of.h')
| -rw-r--r-- | include/linux/of.h | 109 |
1 files changed, 92 insertions, 17 deletions
diff --git a/include/linux/of.h b/include/linux/of.h index 6b79ef9a6541..6ecde0515677 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -16,14 +16,10 @@ #include <linux/errno.h> #include <linux/kobject.h> #include <linux/mod_devicetable.h> -#include <linux/spinlock.h> -#include <linux/topology.h> -#include <linux/notifier.h> #include <linux/property.h> #include <linux/list.h> #include <asm/byteorder.h> -#include <asm/errno.h> typedef u32 phandle; typedef u32 ihandle; @@ -100,8 +96,19 @@ struct of_reconfig_data { struct property *old_prop; }; +/** + * of_node_init - initialize a devicetree node + * @node: Pointer to device node that has been created by kzalloc() + * @phandle_name: Name of property holding a phandle value + * + * On return the device_node refcount is set to one. Use of_node_put() + * on @node when done to free the memory allocated for it. If the node + * is NOT a dynamic node the memory will not be freed. The decision of + * whether to free the memory will be done by node->release(), which is + * of_node_release(). + */ /* initialize a node */ -extern struct kobj_type of_node_ktype; +extern const struct kobj_type of_node_ktype; extern const struct fwnode_operations of_fwnode_ops; static inline void of_node_init(struct device_node *node) { @@ -134,7 +141,6 @@ extern struct device_node *of_root; extern struct device_node *of_chosen; extern struct device_node *of_aliases; extern struct device_node *of_stdout; -extern raw_spinlock_t devtree_lock; /* * struct device_node flag descriptions @@ -350,6 +356,8 @@ extern const void *of_get_property(const struct device_node *node, const char *name, int *lenp); 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, int index); @@ -362,7 +370,9 @@ extern int of_n_addr_cells(struct device_node *np); extern int of_n_size_cells(struct device_node *np); extern const struct of_device_id *of_match_node( const struct of_device_id *matches, const struct device_node *node); -extern int of_modalias_node(struct device_node *node, char *modalias, int len); +extern const void *of_device_get_match_data(const struct device *dev); +extern int of_alias_from_compatible(const struct device_node *node, char *alias, + int len); extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); extern int __of_parse_phandle_with_args(const struct device_node *np, const char *list_name, const char *cells_name, int cell_count, @@ -373,6 +383,10 @@ extern int of_parse_phandle_with_args_map(const struct device_node *np, extern int of_count_phandle_with_args(const struct device_node *np, const char *list_name, const char *cells_name); +/* module functions */ +extern ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len); +extern int of_request_module(const struct device_node *np); + /* phandle iterator functions */ extern int of_phandle_iterator_init(struct of_phandle_iterator *it, const struct device_node *np, @@ -428,8 +442,6 @@ const char *of_prop_next_string(struct property *prop, const char *cur); bool of_console_check(struct device_node *dn, char *name, int index); -extern int of_cpu_node_to_id(struct device_node *np); - int of_map_id(struct device_node *np, u32 id, const char *map_name, const char *map_mask_name, struct device_node **target, u32 *id_out); @@ -624,6 +636,16 @@ static inline struct device_node *of_get_cpu_node(int cpu, return NULL; } +static inline struct device_node *of_cpu_device_node_get(int cpu) +{ + return NULL; +} + +static inline int of_cpu_node_to_id(struct device_node *np) +{ + return -ENODEV; +} + static inline struct device_node *of_get_next_cpu_node(struct device_node *prev) { return NULL; @@ -730,6 +752,17 @@ static inline int of_count_phandle_with_args(const struct device_node *np, return -ENOSYS; } +static inline ssize_t of_modalias(const struct device_node *np, char *str, + ssize_t len) +{ + return -ENODEV; +} + +static inline int of_request_module(const struct device_node *np) +{ + return -ENODEV; +} + static inline int of_phandle_iterator_init(struct of_phandle_iterator *it, const struct device_node *np, const char *list_name, @@ -826,11 +859,6 @@ static inline void of_property_clear_flag(struct property *p, unsigned long flag { } -static inline int of_cpu_node_to_id(struct device_node *np) -{ - return -ENODEV; -} - static inline int of_map_id(struct device_node *np, u32 id, const char *map_name, const char *map_mask_name, struct device_node **target, u32 *id_out) @@ -843,6 +871,11 @@ static inline phys_addr_t of_dma_get_max_cpu_address(struct device_node *np) return PHYS_ADDR_MAX; } +static inline const void *of_device_get_match_data(const struct device *dev) +{ + return NULL; +} + #define of_match_ptr(_ptr) NULL #define of_match_node(_matches, _node) NULL #endif /* CONFIG_OF */ @@ -1009,6 +1042,31 @@ static inline int of_parse_phandle_with_fixed_args(const struct device_node *np, } /** + * of_parse_phandle_with_optional_args() - Find a node pointed by phandle in a list + * @np: pointer to a device tree node containing a list + * @list_name: property name that contains a list + * @cells_name: property name that specifies phandles' arguments count + * @index: index of a phandle to parse out + * @out_args: optional pointer to output arguments structure (will be filled) + * + * Same as of_parse_phandle_with_args() except that if the cells_name property + * is not found, cell_count of 0 is assumed. + * + * This is used to useful, if you have a phandle which didn't have arguments + * before and thus doesn't have a '#*-cells' property but is now migrated to + * having arguments while retaining backwards compatibility. + */ +static inline int of_parse_phandle_with_optional_args(const struct device_node *np, + const char *list_name, + const char *cells_name, + int index, + struct of_phandle_args *out_args) +{ + return __of_parse_phandle_with_args(np, list_name, cells_name, + 0, index, out_args); +} + +/** * of_property_count_u8_elems - Count the number of u8 elements in a property * * @np: device node from which the property value is to be read. @@ -1155,7 +1213,8 @@ static inline int of_property_read_string_index(const struct device_node *np, * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * - * Search for a property in a device node. + * Search for a boolean property in a device node. Usage on non-boolean + * property types is deprecated. * * Return: true if the property exists false otherwise. */ @@ -1168,6 +1227,20 @@ static inline bool of_property_read_bool(const struct device_node *np, } /** + * of_property_present - Test if a property is present in a node + * @np: device node to search for the property. + * @propname: name of the property to be searched. + * + * Test for a property present in a device node. + * + * Return: true if the property exists false otherwise. + */ +static inline bool of_property_present(const struct device_node *np, const char *propname) +{ + return of_property_read_bool(np, propname); +} + +/** * of_property_read_u8_array - Find and read an array of u8 from a property. * * @np: device node from which the property value is to be read. @@ -1461,6 +1534,8 @@ enum of_reconfig_change { OF_RECONFIG_CHANGE_REMOVE, }; +struct notifier_block; + #ifdef CONFIG_OF_DYNAMIC extern int of_reconfig_notifier_register(struct notifier_block *); extern int of_reconfig_notifier_unregister(struct notifier_block *); @@ -1549,9 +1624,9 @@ enum of_overlay_notify_action { OF_OVERLAY_POST_REMOVE, }; -static inline char *of_overlay_action_name(enum of_overlay_notify_action action) +static inline const char *of_overlay_action_name(enum of_overlay_notify_action action) { - static char *of_overlay_action_name[] = { + static const char *const of_overlay_action_name[] = { "init", "pre-apply", "post-apply", |