126 lines
4.4 KiB
C
126 lines
4.4 KiB
C
/*
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* fwnode.h - Firmware device node object handle type definition.
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*
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* Copyright (C) 2015, Intel Corporation
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* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _LINUX_FWNODE_H_
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#define _LINUX_FWNODE_H_
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#include <linux/types.h>
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struct fwnode_operations;
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struct fwnode_handle {
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struct fwnode_handle *secondary;
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const struct fwnode_operations *ops;
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};
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/**
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* struct fwnode_endpoint - Fwnode graph endpoint
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* @port: Port number
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* @id: Endpoint id
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* @local_fwnode: reference to the related fwnode
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*/
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struct fwnode_endpoint {
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unsigned int port;
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unsigned int id;
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const struct fwnode_handle *local_fwnode;
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};
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#define NR_FWNODE_REFERENCE_ARGS 8
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/**
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* struct fwnode_reference_args - Fwnode reference with additional arguments
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* @fwnode:- A reference to the base fwnode
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* @nargs: Number of elements in @args array
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* @args: Integer arguments on the fwnode
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*/
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struct fwnode_reference_args {
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struct fwnode_handle *fwnode;
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unsigned int nargs;
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unsigned int args[NR_FWNODE_REFERENCE_ARGS];
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};
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/**
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* struct fwnode_operations - Operations for fwnode interface
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* @get: Get a reference to an fwnode.
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* @put: Put a reference to an fwnode.
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* @property_present: Return true if a property is present.
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* @property_read_integer_array: Read an array of integer properties. Return
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* zero on success, a negative error code
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* otherwise.
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* @property_read_string_array: Read an array of string properties. Return zero
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* on success, a negative error code otherwise.
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* @get_parent: Return the parent of an fwnode.
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* @get_next_child_node: Return the next child node in an iteration.
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* @get_named_child_node: Return a child node with a given name.
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* @get_reference_args: Return a reference pointed to by a property, with args
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* @graph_get_next_endpoint: Return an endpoint node in an iteration.
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* @graph_get_remote_endpoint: Return the remote endpoint node of a local
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* endpoint node.
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* @graph_get_port_parent: Return the parent node of a port node.
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* @graph_parse_endpoint: Parse endpoint for port and endpoint id.
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*/
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struct fwnode_operations {
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void (*get)(struct fwnode_handle *fwnode);
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void (*put)(struct fwnode_handle *fwnode);
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bool (*device_is_available)(const struct fwnode_handle *fwnode);
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bool (*property_present)(const struct fwnode_handle *fwnode,
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const char *propname);
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int (*property_read_int_array)(const struct fwnode_handle *fwnode,
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const char *propname,
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unsigned int elem_size, void *val,
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size_t nval);
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int
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(*property_read_string_array)(const struct fwnode_handle *fwnode_handle,
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const char *propname, const char **val,
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size_t nval);
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struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode);
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struct fwnode_handle *
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(*get_next_child_node)(const struct fwnode_handle *fwnode,
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struct fwnode_handle *child);
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struct fwnode_handle *
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(*get_named_child_node)(const struct fwnode_handle *fwnode,
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const char *name);
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int (*get_reference_args)(const struct fwnode_handle *fwnode,
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const char *prop, const char *nargs_prop,
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unsigned int nargs, unsigned int index,
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struct fwnode_reference_args *args);
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struct fwnode_handle *
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(*graph_get_next_endpoint)(const struct fwnode_handle *fwnode,
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struct fwnode_handle *prev);
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struct fwnode_handle *
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(*graph_get_remote_endpoint)(const struct fwnode_handle *fwnode);
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struct fwnode_handle *
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(*graph_get_port_parent)(struct fwnode_handle *fwnode);
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int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode,
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struct fwnode_endpoint *endpoint);
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};
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#define fwnode_has_op(fwnode, op) \
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((fwnode) && (fwnode)->ops && (fwnode)->ops->op)
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#define fwnode_call_int_op(fwnode, op, ...) \
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(fwnode ? (fwnode_has_op(fwnode, op) ? \
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(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : -ENXIO) : \
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-EINVAL)
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#define fwnode_call_bool_op(fwnode, op, ...) \
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(fwnode ? (fwnode_has_op(fwnode, op) ? \
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(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : false) : \
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false)
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#define fwnode_call_ptr_op(fwnode, op, ...) \
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(fwnode_has_op(fwnode, op) ? \
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(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : NULL)
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#define fwnode_call_void_op(fwnode, op, ...) \
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do { \
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if (fwnode_has_op(fwnode, op)) \
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(fwnode)->ops->op(fwnode, ## __VA_ARGS__); \
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} while (false)
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#endif
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