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  A   ˆl–Ü4ý( ©³( 	Å€fàB¦-ÿÃƒx=_†I|¥+a–Ým_J*j"Tânà¸ËJbÑ¿Â p    /* 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/bits.h>
#include <linux/err.h>
#include <linux/list.h>
#include <linux/types.h>

#include <linux/rh_kabi.h>

enum dev_dma_attr {
	DEV_DMA_NOT_SUPPORTED,
	DEV_DMA_NON_COHERENT,
	DEV_DMA_COHERENT,
};

struct fwnode_operations;
struct device;

/*
 * fwnode flags
 *
 * LINKS_ADDED:	The fwnode has already be parsed to add fwnode links.
 * NOT_DEVICE:	The fwnode will never be populated as a struct device.
 * INITIALIZED: The hardware corresponding to fwnode has been initialized.
 * NEEDS_CHILD_BOUND_ON_ADD: For this fwnode/device to probe successfully, its
 *			     driver needs its child devices to be bound with
 *			     their respective drivers as soon as they are
 *			     added.
 * BEST_EFFORT: The fwnode/device needs to probe early and might be missing some
 *		suppliers. Only enforce ordering with suppliers that have
 *		drivers.
 */
#define FWNODE_FLAG_LINKS_ADDED			BIT(0)
#define FWNODE_FLAG_NOT_DEVICE			BIT(1)
#define FWNODE_FLAG_INITIALIZED			BIT(2)
#define FWNODE_FLAG_NEEDS_CHILD_BOUND_ON_ADD	BIT(3)
#define FWNODE_FLAG_BEST_EFFORT			BIT(4)
#define FWNODE_FLAG_VISITED			BIT(5)

struct fwnode_handle {
	struct fwnode_handle *secondary;
	RH_KABI_EXCLUDE(const struct fwnode_operations *ops)
	struct device *dev;
	struct list_head suppliers;
	struct list_head consumers;
	u8 flags;
	RH_KABI_RESERVE(1)
	RH_KABI_RESERVE(2)
	RH_KABI_RESERVE(3)
	RH_KABI_RESERVE(4)
};

/*
 * fwnode link flags
 *
 * CYCLE:	The fwnode link is part of a cycle. Don't defer probe.
 * IGNORE:	Completely ignore this link, even during cycle detection.
 */
#define FWLINK_FLAG_CYCLE			BIT(0)
#define FWLINK_FLAG_IGNORE			BIT(1)

struct fwnode_link {
	struct fwnode_handle *supplier;
	struct list_head s_hook;
	struct fwnode_handle *consumer;
	struct list_head c_hook;
	u8 flags;
};

/**
 * 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;
};

/*
 * ports and endpoints defined as software_nodes should all follow a common
 * naming scheme; use these macros to ensure commonality.
 */
#define SWNODE_GRAPH_PORT_NAME_FMT		"port@%u"
#define SWNODE_GRAPH_ENDPOINT_NAME_FMT		"endpoint@%u"

#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_is_available: Return true if the device is available.
 * @device_get_match_data: Return the device driver match data.
 * @property_present: Return true if a property is present.
 * @property_read_bool: Return a boolean property value.
 * @property_read_int_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_name: Return the name of an fwnode.
 * @get_name_prefix: Get a prefix for a node (for printing purposes).
 * @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 a