Release 4.12 include/linux/property.h

/*
 * 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>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _LINUX_PROPERTY_H_

#define _LINUX_PROPERTY_H_

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

struct device;


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


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_property_present(struct fwnode_handle *fwnode, const char *propname);
int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
				  const char *propname, u8 *val,
				  size_t nval);
int fwnode_property_read_u16_array(struct fwnode_handle *fwnode,
				   const char *propname, u16 *val,
				   size_t nval);
int fwnode_property_read_u32_array(struct fwnode_handle *fwnode,
				   const char *propname, u32 *val,
				   size_t nval);
int fwnode_property_read_u64_array(struct fwnode_handle *fwnode,
				   const char *propname, u64 *val,
				   size_t nval);
int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
				      const char *propname, const char **val,
				      size_t nval);
int fwnode_property_read_string(struct fwnode_handle *fwnode,
				const char *propname, const char **val);
int fwnode_property_match_string(struct fwnode_handle *fwnode,
				 const char *propname, const char *string);

struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_next_child_node(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))

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

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

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);
}

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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);
}

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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);
}

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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);
}

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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);
}

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

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

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

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

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

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/**
 * struct property_entry - "Built-in" device property representation.
 * @name: Name of the property.
 * @length: Length of data making up the value.
 * @is_array: True when the property is an array.
 * @is_string: True when property is a string.
 * @pointer: Pointer to the property (an array of items of the given type).
 * @value: Value of the property (when it is a single item of the given type).
 */

struct property_entry {
	
const char *name;
	
size_t length;
	
bool is_array;
	
bool is_string;
	union {
		union {
			
const void *raw_data;
			
const u8 *u8_data;
			
const u16 *u16_data;
			
const u32 *u32_data;
			
const u64 *u64_data;
			
const char * const *str;
		
} pointer;
		union {
			
unsigned long long raw_data;
			
u8 u8_data;
			
u16 u16_data;
			
u32 u32_data;
			
u64 u64_data;
			
const char *str;
		
} value;
	};
};

/*
 * Note: the below four 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_INTEGER_ARRAY(_name_, _type_, _val_)	\
{                                                               \
        .name = _name_,                                         \
        .length = ARRAY_SIZE(_val_) * sizeof(_type_),           \
        .is_array = true,                                       \
        .is_string = false,                                     \
        { .pointer = { ._type_##_data = _val_ } },              \
}


#define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_)			\
	PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, _val_)

#define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_)			\
	PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, _val_)

#define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_)			\
	PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, _val_)

#define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_)			\
	PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, _val_)


#define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_)		\
{                                                               \
        .name = _name_,                                         \
        .length = ARRAY_SIZE(_val_) * sizeof(const char *),     \
        .is_array = true,                                       \
        .is_string = true,                                      \
        { .pointer = { .str = _val_ } },                        \
}


#define PROPERTY_ENTRY_INTEGER(_name_, _type_, _val_)	\
{                                                       \
        .name = _name_,                                 \
        .length = sizeof(_type_),                       \
        .is_string = false,                             \
        { .value = { ._type_##_data = _val_ } },        \
}


#define PROPERTY_ENTRY_U8(_name_, _val_)		\
	PROPERTY_ENTRY_INTEGER(_name_, u8, _val_)

#define PROPERTY_ENTRY_U16(_name_, _val_)		\
	PROPERTY_ENTRY_INTEGER(_name_, u16, _val_)

#define PROPERTY_ENTRY_U32(_name_, _val_)		\
	PROPERTY_ENTRY_INTEGER(_name_, u32, _val_)

#define PROPERTY_ENTRY_U64(_name_, _val_)		\
	PROPERTY_ENTRY_INTEGER(_name_, u64, _val_)


#define PROPERTY_ENTRY_STRING(_name_, _val_)		\
{                                                       \
        .name = _name_,                                 \
        .length = sizeof(_val_),                        \
        .is_string = true,                              \
        { .value = { .str = _val_ } },                  \
}


#define PROPERTY_ENTRY_BOOL(_name_)		\
{                                               \
        .name = _name_,                         \
}

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

void property_entries_free(const struct property_entry *properties);

int device_add_properties(struct device *dev,
			  const struct property_entry *properties);
void device_remove_properties(struct device *dev);

bool device_dma_supported(struct device *dev);

enum dev_dma_attr device_get_dma_attr(struct device *dev);

int device_get_phy_mode(struct device *dev);

void *device_get_mac_address(struct device *dev, char *addr, int alen);

struct fwnode_handle *fwnode_graph_get_next_endpoint(
	struct fwnode_handle *fwnode, struct fwnode_handle *prev);
struct fwnode_handle *fwnode_graph_get_remote_port_parent(
	struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port(
	struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_endpoint(
	struct fwnode_handle *fwnode);

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

#endif /* _LINUX_PROPERTY_H_ */
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