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/* SPDX-License-Identifier: GPL-2.0-only / / * fwnode.h - Firmware device node object handle type definition. * * Copyright (C) 2015, Intel Corporation * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> / #ifndef _LINUX_FWNODE_H_ #define _LINUX_FWNODE_H_ #include <linux/types.h> struct fwnode_operations; struct device; struct fwnode_handle { struct fwnode_handle secondary; const struct fwnode_operations ops; }; /* * struct fwnode_endpoint - Fwnode graph endpoint * @port: Port number * @id: Endpoint id * @local_fwnode: reference to the related fwnode / struct fwnode_endpoint { unsigned int port; unsigned int id; 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; u64 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. * @device_get_match_data: Return the device driver match data. * @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 { struct fwnode_handle (get)(struct fwnode_handle fwnode); void (put)(struct fwnode_handle fwnode); bool (device_is_available)(const struct fwnode_handle fwnode); const void (device_get_match_data)(const struct fwnode_handle fwnode, const struct device dev); 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_has_op(fwnode, op) ? \ (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : 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

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