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256 lines
7.6 KiB
256 lines
7.6 KiB
/* |
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* property.h - Unified device property interface. |
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* |
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* Copyright (C) 2014, Intel Corporation |
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* Authors: Rafael J. Wysocki <[email protected]> |
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* Mika Westerberg <[email protected]> |
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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_PROPERTY_H_ |
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#define _LINUX_PROPERTY_H_ |
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#include <linux/fwnode.h> |
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#include <linux/types.h> |
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struct device; |
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enum dev_prop_type { |
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DEV_PROP_U8, |
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DEV_PROP_U16, |
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DEV_PROP_U32, |
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DEV_PROP_U64, |
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DEV_PROP_STRING, |
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DEV_PROP_MAX, |
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}; |
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enum dev_dma_attr { |
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DEV_DMA_NOT_SUPPORTED, |
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DEV_DMA_NON_COHERENT, |
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DEV_DMA_COHERENT, |
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}; |
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bool device_property_present(struct device *dev, const char *propname); |
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int device_property_read_u8_array(struct device *dev, const char *propname, |
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u8 *val, size_t nval); |
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int device_property_read_u16_array(struct device *dev, const char *propname, |
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u16 *val, size_t nval); |
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int device_property_read_u32_array(struct device *dev, const char *propname, |
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u32 *val, size_t nval); |
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int device_property_read_u64_array(struct device *dev, const char *propname, |
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u64 *val, size_t nval); |
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int device_property_read_string_array(struct device *dev, const char *propname, |
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const char **val, size_t nval); |
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int device_property_read_string(struct device *dev, const char *propname, |
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const char **val); |
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int device_property_match_string(struct device *dev, |
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const char *propname, const char *string); |
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bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname); |
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int fwnode_property_read_u8_array(struct fwnode_handle *fwnode, |
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const char *propname, u8 *val, |
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size_t nval); |
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int fwnode_property_read_u16_array(struct fwnode_handle *fwnode, |
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const char *propname, u16 *val, |
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size_t nval); |
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int fwnode_property_read_u32_array(struct fwnode_handle *fwnode, |
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const char *propname, u32 *val, |
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size_t nval); |
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int fwnode_property_read_u64_array(struct fwnode_handle *fwnode, |
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const char *propname, u64 *val, |
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size_t nval); |
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int fwnode_property_read_string_array(struct fwnode_handle *fwnode, |
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const char *propname, const char **val, |
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size_t nval); |
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int fwnode_property_read_string(struct fwnode_handle *fwnode, |
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const char *propname, const char **val); |
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int fwnode_property_match_string(struct fwnode_handle *fwnode, |
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const char *propname, const char *string); |
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struct fwnode_handle *device_get_next_child_node(struct device *dev, |
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struct fwnode_handle *child); |
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#define device_for_each_child_node(dev, child) \ |
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for (child = device_get_next_child_node(dev, NULL); child; \ |
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child = device_get_next_child_node(dev, child)) |
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struct fwnode_handle *device_get_named_child_node(struct device *dev, |
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const char *childname); |
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void fwnode_handle_put(struct fwnode_handle *fwnode); |
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unsigned int device_get_child_node_count(struct device *dev); |
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static inline bool device_property_read_bool(struct device *dev, |
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const char *propname) |
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{ |
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return device_property_present(dev, propname); |
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} |
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static inline int device_property_read_u8(struct device *dev, |
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const char *propname, u8 *val) |
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{ |
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return device_property_read_u8_array(dev, propname, val, 1); |
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} |
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static inline int device_property_read_u16(struct device *dev, |
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const char *propname, u16 *val) |
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{ |
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return device_property_read_u16_array(dev, propname, val, 1); |
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} |
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static inline int device_property_read_u32(struct device *dev, |
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const char *propname, u32 *val) |
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{ |
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return device_property_read_u32_array(dev, propname, val, 1); |
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} |
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static inline int device_property_read_u64(struct device *dev, |
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const char *propname, u64 *val) |
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{ |
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return device_property_read_u64_array(dev, propname, val, 1); |
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} |
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static inline bool fwnode_property_read_bool(struct fwnode_handle *fwnode, |
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const char *propname) |
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{ |
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return fwnode_property_present(fwnode, propname); |
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} |
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static inline int fwnode_property_read_u8(struct fwnode_handle *fwnode, |
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const char *propname, u8 *val) |
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{ |
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return fwnode_property_read_u8_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_read_u16(struct fwnode_handle *fwnode, |
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const char *propname, u16 *val) |
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{ |
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return fwnode_property_read_u16_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_read_u32(struct fwnode_handle *fwnode, |
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const char *propname, u32 *val) |
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{ |
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return fwnode_property_read_u32_array(fwnode, propname, val, 1); |
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} |
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static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode, |
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const char *propname, u64 *val) |
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{ |
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return fwnode_property_read_u64_array(fwnode, propname, val, 1); |
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} |
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/** |
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* struct property_entry - "Built-in" device property representation. |
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* @name: Name of the property. |
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* @length: Length of data making up the value. |
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* @is_array: True when the property is an array. |
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* @is_string: True when property is a string. |
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* @pointer: Pointer to the property (an array of items of the given type). |
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* @value: Value of the property (when it is a single item of the given type). |
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*/ |
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struct property_entry { |
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const char *name; |
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size_t length; |
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bool is_array; |
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bool is_string; |
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union { |
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union { |
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void *raw_data; |
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u8 *u8_data; |
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u16 *u16_data; |
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u32 *u32_data; |
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u64 *u64_data; |
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const char **str; |
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} pointer; |
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union { |
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unsigned long long raw_data; |
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u8 u8_data; |
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u16 u16_data; |
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u32 u32_data; |
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u64 u64_data; |
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const char *str; |
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} value; |
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}; |
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}; |
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/* |
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* Note: the below four initializers for the anonymous union are carefully |
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* crafted to avoid gcc-4.4.4's problems with initialization of anon unions |
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* and structs. |
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*/ |
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#define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _val_) \ |
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{ \ |
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.name = _name_, \ |
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.length = ARRAY_SIZE(_val_) * sizeof(_type_), \ |
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.is_array = true, \ |
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.is_string = false, \ |
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{ .pointer = { ._type_##_data = _val_ } }, \ |
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} |
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#define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, _val_) |
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#define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, _val_) |
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#define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, _val_) |
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#define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, _val_) |
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#define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \ |
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{ \ |
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.name = _name_, \ |
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.length = ARRAY_SIZE(_val_) * sizeof(const char *), \ |
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.is_array = true, \ |
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.is_string = true, \ |
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{ .pointer = { .str = _val_ } }, \ |
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} |
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#define PROPERTY_ENTRY_INTEGER(_name_, _type_, _val_) \ |
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{ \ |
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.name = _name_, \ |
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.length = sizeof(_type_), \ |
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.is_string = false, \ |
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{ .value = { ._type_##_data = _val_ } }, \ |
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} |
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#define PROPERTY_ENTRY_U8(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER(_name_, u8, _val_) |
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#define PROPERTY_ENTRY_U16(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER(_name_, u16, _val_) |
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#define PROPERTY_ENTRY_U32(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER(_name_, u32, _val_) |
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#define PROPERTY_ENTRY_U64(_name_, _val_) \ |
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PROPERTY_ENTRY_INTEGER(_name_, u64, _val_) |
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#define PROPERTY_ENTRY_STRING(_name_, _val_) \ |
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{ \ |
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.name = _name_, \ |
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.length = sizeof(_val_), \ |
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.is_string = true, \ |
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{ .value = { .str = _val_ } }, \ |
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} |
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#define PROPERTY_ENTRY_BOOL(_name_) \ |
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{ \ |
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.name = _name_, \ |
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} |
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int device_add_properties(struct device *dev, |
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struct property_entry *properties); |
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void device_remove_properties(struct device *dev); |
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bool device_dma_supported(struct device *dev); |
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enum dev_dma_attr device_get_dma_attr(struct device *dev); |
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int device_get_phy_mode(struct device *dev); |
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void *device_get_mac_address(struct device *dev, char *addr, int alen); |
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#endif /* _LINUX_PROPERTY_H_ */
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