diff options
Diffstat (limited to 'include/linux/fwnode.h')
| -rw-r--r-- | include/linux/fwnode.h | 103 |
1 files changed, 93 insertions, 10 deletions
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 3dff2398a5f0..0c35b6caf0f6 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -12,19 +12,13 @@ #ifndef _LINUX_FWNODE_H_ #define _LINUX_FWNODE_H_ -enum fwnode_type { - FWNODE_INVALID = 0, - FWNODE_OF, - FWNODE_ACPI, - FWNODE_ACPI_DATA, - FWNODE_ACPI_STATIC, - FWNODE_PDATA, - FWNODE_IRQCHIP -}; +#include <linux/types.h> + +struct fwnode_operations; struct fwnode_handle { - enum fwnode_type type; struct fwnode_handle *secondary; + const struct fwnode_operations *ops; }; /** @@ -39,4 +33,93 @@ struct fwnode_endpoint { const struct fwnode_handle *local_fwnode; }; +#define NR_FWNODE_REFERENCE_ARGS 8 + +/** + * struct fwnode_reference_args - Fwnode reference with additional arguments + * @fwnode:- A reference to the base fwnode + * @nargs: Number of elements in @args array + * @args: Integer arguments on the fwnode + */ +struct fwnode_reference_args { + struct fwnode_handle *fwnode; + unsigned int nargs; + unsigned int args[NR_FWNODE_REFERENCE_ARGS]; +}; + +/** + * struct fwnode_operations - Operations for fwnode interface + * @get: Get a reference to an fwnode. + * @put: Put a reference to an fwnode. + * @property_present: Return true if a property is present. + * @property_read_integer_array: Read an array of integer properties. Return + * zero on success, a negative error code + * otherwise. + * @property_read_string_array: Read an array of string properties. Return zero + * on success, a negative error code otherwise. + * @get_parent: Return the parent of an fwnode. + * @get_next_child_node: Return the next child node in an iteration. + * @get_named_child_node: Return a child node with a given name. + * @get_reference_args: Return a reference pointed to by a property, with args + * @graph_get_next_endpoint: Return an endpoint node in an iteration. + * @graph_get_remote_endpoint: Return the remote endpoint node of a local + * endpoint node. + * @graph_get_port_parent: Return the parent node of a port node. + * @graph_parse_endpoint: Parse endpoint for port and endpoint id. + */ +struct fwnode_operations { + void (*get)(struct fwnode_handle *fwnode); + void (*put)(struct fwnode_handle *fwnode); + bool (*device_is_available)(const struct fwnode_handle *fwnode); + bool (*property_present)(const struct fwnode_handle *fwnode, + const char *propname); + int (*property_read_int_array)(const struct fwnode_handle *fwnode, + const char *propname, + unsigned int elem_size, void *val, + size_t nval); + int + (*property_read_string_array)(const struct fwnode_handle *fwnode_handle, + const char *propname, const char **val, + size_t nval); + struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode); + struct fwnode_handle * + (*get_next_child_node)(const struct fwnode_handle *fwnode, + struct fwnode_handle *child); + struct fwnode_handle * + (*get_named_child_node)(const struct fwnode_handle *fwnode, + const char *name); + int (*get_reference_args)(const struct fwnode_handle *fwnode, + const char *prop, const char *nargs_prop, + unsigned int nargs, unsigned int index, + struct fwnode_reference_args *args); + struct fwnode_handle * + (*graph_get_next_endpoint)(const struct fwnode_handle *fwnode, + struct fwnode_handle *prev); + struct fwnode_handle * + (*graph_get_remote_endpoint)(const struct fwnode_handle *fwnode); + struct fwnode_handle * + (*graph_get_port_parent)(struct fwnode_handle *fwnode); + int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode, + struct fwnode_endpoint *endpoint); +}; + +#define fwnode_has_op(fwnode, op) \ + ((fwnode) && (fwnode)->ops && (fwnode)->ops->op) +#define fwnode_call_int_op(fwnode, op, ...) \ + (fwnode ? (fwnode_has_op(fwnode, op) ? \ + (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : -ENXIO) : \ + -EINVAL) +#define fwnode_call_bool_op(fwnode, op, ...) \ + (fwnode ? (fwnode_has_op(fwnode, op) ? \ + (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : false) : \ + false) +#define fwnode_call_ptr_op(fwnode, op, ...) \ + (fwnode_has_op(fwnode, op) ? \ + (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : NULL) +#define fwnode_call_void_op(fwnode, op, ...) \ + do { \ + if (fwnode_has_op(fwnode, op)) \ + (fwnode)->ops->op(fwnode, ## __VA_ARGS__); \ + } while (false) + #endif |