[linux-block.git] / include / linux / property.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * property.h - Unified device property interface.
 *
 * Copyright (C) 2014, Intel Corporation
 * Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 *          Mika Westerberg <mika.westerberg@linux.intel.com>
 */

#ifndef _LINUX_PROPERTY_H_
#define _LINUX_PROPERTY_H_

#include <linux/bits.h>
#include <linux/fwnode.h>
#include <linux/types.h>

struct device;
struct net_device;

enum dev_prop_type {
	DEV_PROP_U8,
	DEV_PROP_U16,
	DEV_PROP_U32,
	DEV_PROP_U64,
	DEV_PROP_STRING,
	DEV_PROP_REF,
};

enum dev_dma_attr {
	DEV_DMA_NOT_SUPPORTED,
	DEV_DMA_NON_COHERENT,
	DEV_DMA_COHERENT,
};

struct fwnode_handle *dev_fwnode(struct device *dev);

bool device_property_present(struct device *dev, const char *propname);
int device_property_read_u8_array(struct device *dev, const char *propname,
				  u8 *val, size_t nval);
int device_property_read_u16_array(struct device *dev, const char *propname,
				   u16 *val, size_t nval);
int device_property_read_u32_array(struct device *dev, const char *propname,
				   u32 *val, size_t nval);
int device_property_read_u64_array(struct device *dev, const char *propname,
				   u64 *val, size_t nval);
int device_property_read_string_array(struct device *dev, const char *propname,
				      const char **val, size_t nval);
int device_property_read_string(struct device *dev, const char *propname,
				const char **val);
int device_property_match_string(struct device *dev,
				 const char *propname, const char *string);

bool fwnode_device_is_available(const struct fwnode_handle *fwnode);
bool fwnode_property_present(const struct fwnode_handle *fwnode,
			     const char *propname);
int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode,
				  const char *propname, u8 *val,
				  size_t nval);
int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode,
				   const char *propname, u16 *val,
				   size_t nval);
int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode,
				   const char *propname, u32 *val,
				   size_t nval);
int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode,
				   const char *propname, u64 *val,
				   size_t nval);
int fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
				      const char *propname, const char **val,
				      size_t nval);
int fwnode_property_read_string(const struct fwnode_handle *fwnode,
				const char *propname, const char **val);
int fwnode_property_match_string(const struct fwnode_handle *fwnode,
				 const char *propname, const char *string);
int fwnode_property_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 *fwnode_find_reference(const struct fwnode_handle *fwnode,
					    const char *name,
					    unsigned int index);

const char *fwnode_get_name(const struct fwnode_handle *fwnode);
const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_next_parent(
	struct fwnode_handle *fwnode);
struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode);
unsigned int fwnode_count_parents(const struct fwnode_handle *fwn);
struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn,
					    unsigned int depth);
bool fwnode_is_ancestor_of(struct fwnode_handle *test_ancestor,
				  struct fwnode_handle *test_child);
struct fwnode_handle *fwnode_get_next_child_node(
	const struct fwnode_handle *fwnode, struct fwnode_handle *child);
struct fwnode_handle *fwnode_get_next_available_child_node(
	const struct fwnode_handle *fwnode, struct fwnode_handle *child);

#define fwnode_for_each_child_node(fwnode, child)			\
	for (child = fwnode_get_next_child_node(fwnode, NULL); child;	\
	     child = fwnode_get_next_child_node(fwnode, child))

#define fwnode_for_each_available_child_node(fwnode, child)		       \
	for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
	     child = fwnode_get_next_available_child_node(fwnode, child))

struct fwnode_handle *device_get_next_child_node(
	struct device *dev, struct fwnode_handle *child);

#define device_for_each_child_node(dev, child)				\
	for (child = device_get_next_child_node(dev, NULL); child;	\
	     child = device_get_next_child_node(dev, child))

struct fwnode_handle *fwnode_get_named_child_node(
	const struct fwnode_handle *fwnode, const char *childname);
struct fwnode_handle *device_get_named_child_node(struct device *dev,
						  const char *childname);

struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode);
void fwnode_handle_put(struct fwnode_handle *fwnode);

int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);

void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index);

unsigned int device_get_child_node_count(struct device *dev);

static inline bool device_property_read_bool(struct device *dev,
					     const char *propname)
{
	return device_property_present(dev, propname);
}

static inline int device_property_read_u8(struct device *dev,
					  const char *propname, u8 *val)
{
	return device_property_read_u8_array(dev, propname, val, 1);
}

static inline int device_property_read_u16(struct device *dev,
					   const char *propname, u16 *val)
{
	return device_property_read_u16_array(dev, propname, val, 1);
}

static inline int device_property_read_u32(struct device *dev,
					   const char *propname, u32 *val)
{
	return device_property_read_u32_array(dev, propname, val, 1);
}

static inline int device_property_read_u64(struct device *dev,
					   const char *propname, u64 *val)
{
	return device_property_read_u64_array(dev, propname, val, 1);
}

static inline int device_property_count_u8(struct device *dev, const char *propname)
{
	return device_property_read_u8_array(dev, propname, NULL, 0);
}

static inline int device_property_count_u16(struct device *dev, const char *propname)
{
	return device_property_read_u16_array(dev, propname, NULL, 0);
}

static inline int device_property_count_u32(struct device *dev, const char *propname)
{
	return device_property_read_u32_array(dev, propname, NULL, 0);
}

static inline int device_property_count_u64(struct device *dev, const char *propname)
{
	return device_property_read_u64_array(dev, propname, NULL, 0);
}

static inline int device_property_string_array_count(struct device *dev,
						     const char *propname)
{
	return device_property_read_string_array(dev, propname, NULL, 0);
}

static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode,
					     const char *propname)
{
	return fwnode_property_present(fwnode, propname);
}

static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode,
					  const char *propname, u8 *val)
{
	return fwnode_property_read_u8_array(fwnode, propname, val, 1);
}

static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode,
					   const char *propname, u16 *val)
{
	return fwnode_property_read_u16_array(fwnode, propname, val, 1);
}

static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode,
					   const char *propname, u32 *val)
{
	return fwnode_property_read_u32_array(fwnode, propname, val, 1);
}

static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode,
					   const char *propname, u64 *val)
{
	return fwnode_property_read_u64_array(fwnode, propname, val, 1);
}

static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode,
					   const char *propname)
{
	return fwnode_property_read_u8_array(fwnode, propname, NULL, 0);
}

static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode,
					    const char *propname)
{
	return fwnode_property_read_u16_array(fwnode, propname, NULL, 0);
}

static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode,
					    const char *propname)
{
	return fwnode_property_read_u32_array(fwnode, propname, NULL, 0);
}

static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
					    const char *propname)
{
	return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
}

static inline int
fwnode_property_string_array_count(const struct fwnode_handle *fwnode,
				   const char *propname)
{
	return fwnode_property_read_string_array(fwnode, propname, NULL, 0);
}

struct software_node;

/**
 * struct software_node_ref_args - Reference property with additional arguments
 * @node: Reference to a software node
 * @nargs: Number of elements in @args array
 * @args: Integer arguments
 */
struct software_node_ref_args {
	const struct software_node *node;
	unsigned int nargs;
	u64 args[NR_FWNODE_REFERENCE_ARGS];
};

#define SOFTWARE_NODE_REFERENCE(_ref_, ...)			\
(const struct software_node_ref_args) {				\
	.node = _ref_,						\
	.nargs = ARRAY_SIZE(((u64[]){ 0, ##__VA_ARGS__ })) - 1,	\
	.args = { __VA_ARGS__ },				\
}

/**
 * struct property_entry - "Built-in" device property representation.
 * @name: Name of the property.
 * @length: Length of data making up the value.
 * @is_inline: True when the property value is stored inline.
 * @type: Type of the data in unions.
 * @pointer: Pointer to the property when it is not stored inline.
 * @value: Value of the property when it is stored inline.
 */
struct property_entry {
	const char *name;
	size_t length;
	bool is_inline;
	enum dev_prop_type type;
	union {
		const void *pointer;
		union {
			u8 u8_data[sizeof(u64) / sizeof(u8)];
			u16 u16_data[sizeof(u64) / sizeof(u16)];
			u32 u32_data[sizeof(u64) / sizeof(u32)];
			u64 u64_data[sizeof(u64) / sizeof(u64)];
			const char *str[sizeof(u64) / sizeof(char *)];
		} value;
	};
};

/*
 * Note: the below initializers for the anonymous union are carefully
 * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
 * and structs.
 */

#define __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_)				\
	sizeof(((struct property_entry *)NULL)->value._elem_[0])

#define __PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, _elsize_, _Type_,	\
					  _val_, _len_)			\
(struct property_entry) {						\
	.name = _name_,							\
	.length = (_len_) * (_elsize_),					\
	.type = DEV_PROP_##_Type_,					\
	{ .pointer = _val_ },						\
}

#define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_)\
	__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_,			\
				__PROPERTY_ENTRY_ELEMENT_SIZE(_elem_),	\
				_Type_, _val_, _len_)

#define PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, _len_)		\
	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u8_data, U8, _val_, _len_)
#define PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, _len_)		\
	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u16_data, U16, _val_, _len_)
#define PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, _len_)		\
	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u32_data, U32, _val_, _len_)
#define PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, _len_)		\
	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u64_data, U64, _val_, _len_)
#define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_)		\
	__PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_)
#define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_)		\
	__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_,			\
				sizeof(struct software_node_ref_args),	\
				REF, _val_, _len_)

#define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_)				\
	PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
#define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_)				\
	PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
#define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_)				\
	PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
#define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_)				\
	PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
#define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_)			\
	PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
#define PROPERTY_ENTRY_REF_ARRAY(_name_, _val_)			\
	PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))

#define __PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_)		\
(struct property_entry) {						\
	.name = _name_,							\
	.length = __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_),		\
	.is_inline = true,						\
	.type = DEV_PROP_##_Type_,					\
	{ .value = { ._elem_[0] = _val_ } },				\
}

#define PROPERTY_ENTRY_U8(_name_, _val_)				\
	__PROPERTY_ENTRY_ELEMENT(_name_, u8_data, U8, _val_)
#define PROPERTY_ENTRY_U16(_name_, _val_)				\
	__PROPERTY_ENTRY_ELEMENT(_name_, u16_data, U16, _val_)
#define PROPERTY_ENTRY_U32(_name_, _val_)				\
	__PROPERTY_ENTRY_ELEMENT(_name_, u32_data, U32, _val_)
#define PROPERTY_ENTRY_U64(_name_, _val_)				\
	__PROPERTY_ENTRY_ELEMENT(_name_, u64_data, U64, _val_)
#define PROPERTY_ENTRY_STRING(_name_, _val_)				\
	__PROPERTY_ENTRY_ELEMENT(_name_, str, STRING, _val_)

#define PROPERTY_ENTRY_BOOL(_name_)		\
(struct property_entry) {			\
	.name = _name_,				\
	.is_inline = true,			\
}

#define PROPERTY_ENTRY_REF(_name_, _ref_, ...)				\
(struct property_entry) {						\
	.name = _name_,							\
	.length = sizeof(struct software_node_ref_args),		\
	.type = DEV_PROP_REF,						\
	{ .pointer = &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__), },	\
}

struct property_entry *
property_entries_dup(const struct property_entry *properties);

void property_entries_free(const struct property_entry *properties);

bool device_dma_supported(struct device *dev);

enum dev_dma_attr device_get_dma_attr(struct device *dev);

const void *device_get_match_data(struct device *dev);

int device_get_phy_mode(struct device *dev);

int fwnode_get_phy_mode(struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_next_endpoint(
	const struct fwnode_handle *fwnode, struct fwnode_handle *prev);
struct fwnode_handle *
fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port_parent(
	const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port(
	const struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_endpoint(
	const struct fwnode_handle *fwnode);

static inline bool fwnode_graph_is_endpoint(struct fwnode_handle *fwnode)
{
	return fwnode_property_present(fwnode, "remote-endpoint");
}

/*
 * Fwnode lookup flags
 *
 * @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the
 *				closest endpoint ID greater than the specified
 *				one.
 * @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote
 *				  endpoint of the given endpoint belongs to,
 *				  may be disabled, or that the endpoint is not
 *				  connected.
 */
#define FWNODE_GRAPH_ENDPOINT_NEXT	BIT(0)
#define FWNODE_GRAPH_DEVICE_DISABLED	BIT(1)

struct fwnode_handle *
fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
				u32 port, u32 endpoint, unsigned long flags);
unsigned int fwnode_graph_get_endpoint_count(struct fwnode_handle *fwnode,
					     unsigned long flags);

#define fwnode_graph_for_each_endpoint(fwnode, child)			\
	for (child = NULL;						\
	     (child = fwnode_graph_get_next_endpoint(fwnode, child)); )

int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
				struct fwnode_endpoint *endpoint);

typedef void *(*devcon_match_fn_t)(struct fwnode_handle *fwnode, const char *id,
				   void *data);

void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
				   const char *con_id, void *data,
				   devcon_match_fn_t match);

static inline void *device_connection_find_match(struct device *dev,
						 const char *con_id, void *data,
						 devcon_match_fn_t match)
{
	return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match);
}

/* -------------------------------------------------------------------------- */
/* Software fwnode support - when HW description is incomplete or missing */

/**
 * struct software_node - Software node description
 * @name: Name of the software node
 * @parent: Parent of the software node
 * @properties: Array of device properties
 */
struct software_node {
	const char *name;
	const struct software_node *parent;
	const struct property_entry *properties;
};

bool is_software_node(const struct fwnode_handle *fwnode);
const struct software_node *
to_software_node(const struct fwnode_handle *fwnode);
struct fwnode_handle *software_node_fwnode(const struct software_node *node);

const struct software_node *
software_node_find_by_name(const struct software_node *parent,
			   const char *name);

int software_node_register_nodes(const struct software_node *nodes);
void software_node_unregister_nodes(const struct software_node *nodes);

int software_node_register_node_group(const struct software_node **node_group);
void software_node_unregister_node_group(const struct software_node **node_group);

int software_node_register(const struct software_node *node);
void software_node_unregister(const struct software_node *node);

struct fwnode_handle *
fwnode_create_software_node(const struct property_entry *properties,
			    const struct fwnode_handle *parent);
void fwnode_remove_software_node(struct fwnode_handle *fwnode);

int device_add_software_node(struct device *dev, const struct software_node *node);
void device_remove_software_node(struct device *dev);

int device_create_managed_software_node(struct device *dev,
					const struct property_entry *properties,
					const struct software_node *parent);

#endif /* _LINUX_PROPERTY_H_ */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/*
	3	* property.h - Unified device property interface.
	4	*
	5	* Copyright (C) 2014, Intel Corporation
	6	* Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
	7	* Mika Westerberg <mika.westerberg@linux.intel.com>
	8	*/
	9
	10	#ifndef _LINUX_PROPERTY_H_
	11	#define _LINUX_PROPERTY_H_
	12
	13	#include <linux/bits.h>
	14	#include <linux/fwnode.h>
	15	#include <linux/types.h>
	16
	17	struct device;
	18	struct net_device;
	19
	20	enum dev_prop_type {
	21	DEV_PROP_U8,
	22	DEV_PROP_U16,
	23	DEV_PROP_U32,
	24	DEV_PROP_U64,
	25	DEV_PROP_STRING,
	26	DEV_PROP_REF,
	27	};
	28
	29	enum dev_dma_attr {
	30	DEV_DMA_NOT_SUPPORTED,
	31	DEV_DMA_NON_COHERENT,
	32	DEV_DMA_COHERENT,
	33	};
	34
	35	struct fwnode_handle dev_fwnode(struct device dev);
	36
	37	bool device_property_present(struct device dev, const char propname);
	38	int device_property_read_u8_array(struct device dev, const char propname,
	39	u8 *val, size_t nval);
	40	int device_property_read_u16_array(struct device dev, const char propname,
	41	u16 *val, size_t nval);
	42	int device_property_read_u32_array(struct device dev, const char propname,
	43	u32 *val, size_t nval);
	44	int device_property_read_u64_array(struct device dev, const char propname,
	45	u64 *val, size_t nval);
	46	int device_property_read_string_array(struct device dev, const char propname,
	47	const char **val, size_t nval);
	48	int device_property_read_string(struct device dev, const char propname,
	49	const char **val);
	50	int device_property_match_string(struct device *dev,
	51	const char propname, const char string);
	52
	53	bool fwnode_device_is_available(const struct fwnode_handle *fwnode);
	54	bool fwnode_property_present(const struct fwnode_handle *fwnode,
	55	const char *propname);
	56	int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode,
	57	const char propname, u8 val,
	58	size_t nval);
	59	int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode,
	60	const char propname, u16 val,
	61	size_t nval);
	62	int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode,
	63	const char propname, u32 val,
	64	size_t nval);
	65	int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode,
	66	const char propname, u64 val,
	67	size_t nval);
	68	int fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
	69	const char propname, const char *val,
	70	size_t nval);
	71	int fwnode_property_read_string(const struct fwnode_handle *fwnode,
	72	const char propname, const char *val);
	73	int fwnode_property_match_string(const struct fwnode_handle *fwnode,
	74	const char propname, const char string);
	75	int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
	76	const char prop, const char nargs_prop,
	77	unsigned int nargs, unsigned int index,
	78	struct fwnode_reference_args *args);
	79
	80	struct fwnode_handle fwnode_find_reference(const struct fwnode_handle fwnode,
	81	const char *name,
	82	unsigned int index);
	83
	84	const char fwnode_get_name(const struct fwnode_handle fwnode);
	85	const char fwnode_get_name_prefix(const struct fwnode_handle fwnode);
	86	struct fwnode_handle fwnode_get_parent(const struct fwnode_handle fwnode);
	87	struct fwnode_handle *fwnode_get_next_parent(
	88	struct fwnode_handle *fwnode);
	89	struct device fwnode_get_next_parent_dev(struct fwnode_handle fwnode);
	90	unsigned int fwnode_count_parents(const struct fwnode_handle *fwn);
	91	struct fwnode_handle fwnode_get_nth_parent(struct fwnode_handle fwn,
	92	unsigned int depth);
	93	bool fwnode_is_ancestor_of(struct fwnode_handle *test_ancestor,
	94	struct fwnode_handle *test_child);
	95	struct fwnode_handle *fwnode_get_next_child_node(
	96	const struct fwnode_handle fwnode, struct fwnode_handle child);
	97	struct fwnode_handle *fwnode_get_next_available_child_node(
	98	const struct fwnode_handle fwnode, struct fwnode_handle child);
	99
	100	#define fwnode_for_each_child_node(fwnode, child) \
	101	for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
	102	child = fwnode_get_next_child_node(fwnode, child))
	103
	104	#define fwnode_for_each_available_child_node(fwnode, child) \
	105	for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
	106	child = fwnode_get_next_available_child_node(fwnode, child))
	107
	108	struct fwnode_handle *device_get_next_child_node(
	109	struct device dev, struct fwnode_handle child);
	110
	111	#define device_for_each_child_node(dev, child) \
	112	for (child = device_get_next_child_node(dev, NULL); child; \
	113	child = device_get_next_child_node(dev, child))
	114
	115	struct fwnode_handle *fwnode_get_named_child_node(
	116	const struct fwnode_handle fwnode, const char childname);
	117	struct fwnode_handle device_get_named_child_node(struct device dev,
	118	const char *childname);
	119
	120	struct fwnode_handle fwnode_handle_get(struct fwnode_handle fwnode);
	121	void fwnode_handle_put(struct fwnode_handle *fwnode);
	122
	123	int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);
	124
	125	void __iomem fwnode_iomap(struct fwnode_handle fwnode, int index);
	126
	127	unsigned int device_get_child_node_count(struct device *dev);
	128
	129	static inline bool device_property_read_bool(struct device *dev,
	130	const char *propname)
	131	{
	132	return device_property_present(dev, propname);
	133	}
	134
	135	static inline int device_property_read_u8(struct device *dev,
	136	const char propname, u8 val)
	137	{
	138	return device_property_read_u8_array(dev, propname, val, 1);
	139	}
	140
	141	static inline int device_property_read_u16(struct device *dev,
	142	const char propname, u16 val)
	143	{
	144	return device_property_read_u16_array(dev, propname, val, 1);
	145	}
	146
	147	static inline int device_property_read_u32(struct device *dev,
	148	const char propname, u32 val)
	149	{
	150	return device_property_read_u32_array(dev, propname, val, 1);
	151	}
	152
	153	static inline int device_property_read_u64(struct device *dev,
	154	const char propname, u64 val)
	155	{
	156	return device_property_read_u64_array(dev, propname, val, 1);
	157	}
	158
	159	static inline int device_property_count_u8(struct device dev, const char propname)
	160	{
	161	return device_property_read_u8_array(dev, propname, NULL, 0);
	162	}
	163
	164	static inline int device_property_count_u16(struct device dev, const char propname)
	165	{
	166	return device_property_read_u16_array(dev, propname, NULL, 0);
	167	}
	168
	169	static inline int device_property_count_u32(struct device dev, const char propname)
	170	{
	171	return device_property_read_u32_array(dev, propname, NULL, 0);
	172	}
	173
	174	static inline int device_property_count_u64(struct device dev, const char propname)
	175	{
	176	return device_property_read_u64_array(dev, propname, NULL, 0);
	177	}
	178
	179	static inline int device_property_string_array_count(struct device *dev,
	180	const char *propname)
	181	{
	182	return device_property_read_string_array(dev, propname, NULL, 0);
	183	}
	184
	185	static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode,
	186	const char *propname)
	187	{
	188	return fwnode_property_present(fwnode, propname);
	189	}
	190
	191	static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode,
	192	const char propname, u8 val)
	193	{
	194	return fwnode_property_read_u8_array(fwnode, propname, val, 1);
	195	}
	196
	197	static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode,
	198	const char propname, u16 val)
	199	{
	200	return fwnode_property_read_u16_array(fwnode, propname, val, 1);
	201	}
	202
	203	static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode,
	204	const char propname, u32 val)
	205	{
	206	return fwnode_property_read_u32_array(fwnode, propname, val, 1);
	207	}
	208
	209	static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode,
	210	const char propname, u64 val)
	211	{
	212	return fwnode_property_read_u64_array(fwnode, propname, val, 1);
	213	}
	214
	215	static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode,
	216	const char *propname)
	217	{
	218	return fwnode_property_read_u8_array(fwnode, propname, NULL, 0);
	219	}
	220
	221	static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode,
	222	const char *propname)
	223	{
	224	return fwnode_property_read_u16_array(fwnode, propname, NULL, 0);
	225	}
	226
	227	static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode,
	228	const char *propname)
	229	{
	230	return fwnode_property_read_u32_array(fwnode, propname, NULL, 0);
	231	}
	232
	233	static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
	234	const char *propname)
	235	{
	236	return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
	237	}
	238
	239	static inline int
	240	fwnode_property_string_array_count(const struct fwnode_handle *fwnode,
	241	const char *propname)
	242	{
	243	return fwnode_property_read_string_array(fwnode, propname, NULL, 0);
	244	}
	245
	246	struct software_node;
	247
	248	/**
	249	* struct software_node_ref_args - Reference property with additional arguments
	250	* @node: Reference to a software node
	251	* @nargs: Number of elements in @args array
	252	* @args: Integer arguments
	253	*/
	254	struct software_node_ref_args {
	255	const struct software_node *node;
	256	unsigned int nargs;
	257	u64 args[NR_FWNODE_REFERENCE_ARGS];
	258	};
	259
	260	#define SOFTWARE_NODE_REFERENCE(_ref_, ...) \
	261	(const struct software_node_ref_args) { \
	262	.node = _ref_, \
	263	.nargs = ARRAY_SIZE(((u64[]){ 0, ##__VA_ARGS__ })) - 1, \
	264	.args = { __VA_ARGS__ }, \
	265	}
	266
	267	/**
	268	* struct property_entry - "Built-in" device property representation.
	269	* @name: Name of the property.
	270	* @length: Length of data making up the value.
	271	* @is_inline: True when the property value is stored inline.
	272	* @type: Type of the data in unions.
	273	* @pointer: Pointer to the property when it is not stored inline.
	274	* @value: Value of the property when it is stored inline.
	275	*/
	276	struct property_entry {
	277	const char *name;
	278	size_t length;
	279	bool is_inline;
	280	enum dev_prop_type type;
	281	union {
	282	const void *pointer;
	283	union {
	284	u8 u8_data[sizeof(u64) / sizeof(u8)];
	285	u16 u16_data[sizeof(u64) / sizeof(u16)];
	286	u32 u32_data[sizeof(u64) / sizeof(u32)];
	287	u64 u64_data[sizeof(u64) / sizeof(u64)];
	288	const char str[sizeof(u64) / sizeof(char )];
	289	} value;
	290	};
	291	};
	292
	293	/*
	294	* Note: the below initializers for the anonymous union are carefully
	295	* crafted to avoid gcc-4.4.4's problems with initialization of anon unions
	296	* and structs.
	297	*/
	298
	299	#define __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_) \
	300	sizeof(((struct property_entry *)NULL)->value._elem_[0])
	301
	302	#define __PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, _elsize_, _Type_, \
	303	_val_, _len_) \
	304	(struct property_entry) { \
	305	.name = _name_, \
	306	.length = (_len_) * (_elsize_), \
	307	.type = DEV_PROP_##_Type_, \
	308	{ .pointer = _val_ }, \
	309	}
	310
	311	#define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_)\
	312	__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, \
	313	__PROPERTY_ENTRY_ELEMENT_SIZE(_elem_), \
	314	_Type_, _val_, _len_)
	315
	316	#define PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, _len_) \
	317	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u8_data, U8, _val_, _len_)
	318	#define PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, _len_) \
	319	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u16_data, U16, _val_, _len_)
	320	#define PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, _len_) \
	321	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u32_data, U32, _val_, _len_)
	322	#define PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, _len_) \
	323	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u64_data, U64, _val_, _len_)
	324	#define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_) \
	325	__PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_)
	326	#define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_) \
	327	__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, \
	328	sizeof(struct software_node_ref_args), \
	329	REF, _val_, _len_)
	330
	331	#define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \
	332	PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
	333	#define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \
	334	PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
	335	#define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \
	336	PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
	337	#define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \
	338	PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
	339	#define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \
	340	PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
	341	#define PROPERTY_ENTRY_REF_ARRAY(_name_, _val_) \
	342	PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
	343
	344	#define __PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_) \
	345	(struct property_entry) { \
	346	.name = _name_, \
	347	.length = __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_), \
	348	.is_inline = true, \
	349	.type = DEV_PROP_##_Type_, \
	350	{ .value = { ._elem_[0] = _val_ } }, \
	351	}
	352
	353	#define PROPERTY_ENTRY_U8(_name_, _val_) \
	354	__PROPERTY_ENTRY_ELEMENT(_name_, u8_data, U8, _val_)
	355	#define PROPERTY_ENTRY_U16(_name_, _val_) \
	356	__PROPERTY_ENTRY_ELEMENT(_name_, u16_data, U16, _val_)
	357	#define PROPERTY_ENTRY_U32(_name_, _val_) \
	358	__PROPERTY_ENTRY_ELEMENT(_name_, u32_data, U32, _val_)
	359	#define PROPERTY_ENTRY_U64(_name_, _val_) \
	360	__PROPERTY_ENTRY_ELEMENT(_name_, u64_data, U64, _val_)
	361	#define PROPERTY_ENTRY_STRING(_name_, _val_) \
	362	__PROPERTY_ENTRY_ELEMENT(_name_, str, STRING, _val_)
	363
	364	#define PROPERTY_ENTRY_BOOL(_name_) \
	365	(struct property_entry) { \
	366	.name = _name_, \
	367	.is_inline = true, \
	368	}
	369
	370	#define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \
	371	(struct property_entry) { \
	372	.name = _name_, \
	373	.length = sizeof(struct software_node_ref_args), \
	374	.type = DEV_PROP_REF, \
	375	{ .pointer = &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__), }, \
	376	}
	377
	378	struct property_entry *
	379	property_entries_dup(const struct property_entry *properties);
	380
	381	void property_entries_free(const struct property_entry *properties);
	382
	383	bool device_dma_supported(struct device *dev);
	384
	385	enum dev_dma_attr device_get_dma_attr(struct device *dev);
	386
	387	const void device_get_match_data(struct device dev);
	388
	389	int device_get_phy_mode(struct device *dev);
	390
	391	int fwnode_get_phy_mode(struct fwnode_handle *fwnode);
	392	struct fwnode_handle *fwnode_graph_get_next_endpoint(
	393	const struct fwnode_handle fwnode, struct fwnode_handle prev);
	394	struct fwnode_handle *
	395	fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode);
	396	struct fwnode_handle *fwnode_graph_get_remote_port_parent(
	397	const struct fwnode_handle *fwnode);
	398	struct fwnode_handle *fwnode_graph_get_remote_port(
	399	const struct fwnode_handle *fwnode);
	400	struct fwnode_handle *fwnode_graph_get_remote_endpoint(
	401	const struct fwnode_handle *fwnode);
	402
	403	static inline bool fwnode_graph_is_endpoint(struct fwnode_handle *fwnode)
	404	{
	405	return fwnode_property_present(fwnode, "remote-endpoint");
	406	}
	407
	408	/*
	409	* Fwnode lookup flags
	410	*
	411	* @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the
	412	* closest endpoint ID greater than the specified
	413	* one.
	414	* @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote
	415	* endpoint of the given endpoint belongs to,
	416	* may be disabled, or that the endpoint is not
	417	* connected.
	418	*/
	419	#define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0)
	420	#define FWNODE_GRAPH_DEVICE_DISABLED BIT(1)
	421
	422	struct fwnode_handle *
	423	fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
	424	u32 port, u32 endpoint, unsigned long flags);
	425	unsigned int fwnode_graph_get_endpoint_count(struct fwnode_handle *fwnode,
	426	unsigned long flags);
	427
	428	#define fwnode_graph_for_each_endpoint(fwnode, child) \
	429	for (child = NULL; \
	430	(child = fwnode_graph_get_next_endpoint(fwnode, child)); )
	431
	432	int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
	433	struct fwnode_endpoint *endpoint);
	434
	435	typedef void (devcon_match_fn_t)(struct fwnode_handle fwnode, const char id,
	436	void *data);
	437
	438	void fwnode_connection_find_match(struct fwnode_handle fwnode,
	439	const char con_id, void data,
	440	devcon_match_fn_t match);
	441
	442	static inline void device_connection_find_match(struct device dev,
	443	const char con_id, void data,
	444	devcon_match_fn_t match)
	445	{
	446	return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match);
	447	}
	448
	449	/* -------------------------------------------------------------------------- */
	450	/* Software fwnode support - when HW description is incomplete or missing */
	451
	452	/**
	453	* struct software_node - Software node description
	454	* @name: Name of the software node
	455	* @parent: Parent of the software node
	456	* @properties: Array of device properties
	457	*/
	458	struct software_node {
	459	const char *name;
	460	const struct software_node *parent;
	461	const struct property_entry *properties;
	462	};
	463
	464	bool is_software_node(const struct fwnode_handle *fwnode);
	465	const struct software_node *
	466	to_software_node(const struct fwnode_handle *fwnode);
	467	struct fwnode_handle software_node_fwnode(const struct software_node node);
	468
	469	const struct software_node *
	470	software_node_find_by_name(const struct software_node *parent,
	471	const char *name);
	472
	473	int software_node_register_nodes(const struct software_node *nodes);
	474	void software_node_unregister_nodes(const struct software_node *nodes);
	475
	476	int software_node_register_node_group(const struct software_node **node_group);
	477	void software_node_unregister_node_group(const struct software_node **node_group);
	478
	479	int software_node_register(const struct software_node *node);
	480	void software_node_unregister(const struct software_node *node);
	481
	482	struct fwnode_handle *
	483	fwnode_create_software_node(const struct property_entry *properties,
	484	const struct fwnode_handle *parent);
	485	void fwnode_remove_software_node(struct fwnode_handle *fwnode);
	486
	487	int device_add_software_node(struct device dev, const struct software_node node);
	488	void device_remove_software_node(struct device *dev);
	489
	490	int device_create_managed_software_node(struct device *dev,
	491	const struct property_entry *properties,
	492	const struct software_node *parent);
	493
	494	#endif /* _LINUX_PROPERTY_H_ */