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drivers/base/property.c
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/* * property.c - 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. */ |
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#include <linux/acpi.h> |
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#include <linux/export.h> #include <linux/kernel.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/property.h> |
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#include <linux/etherdevice.h> #include <linux/phy.h> |
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struct property_set { struct fwnode_handle fwnode; struct property_entry *properties; }; |
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static inline bool is_pset_node(struct fwnode_handle *fwnode) |
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{ |
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return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_PDATA; |
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} |
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static inline struct property_set *to_pset_node(struct fwnode_handle *fwnode) |
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{ |
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return is_pset_node(fwnode) ? |
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container_of(fwnode, struct property_set, fwnode) : NULL; } static struct property_entry *pset_prop_get(struct property_set *pset, const char *name) { struct property_entry *prop; if (!pset || !pset->properties) return NULL; for (prop = pset->properties; prop->name; prop++) if (!strcmp(name, prop->name)) return prop; return NULL; } |
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static void *pset_prop_find(struct property_set *pset, const char *propname, size_t length) |
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{ struct property_entry *prop; |
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void *pointer; |
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prop = pset_prop_get(pset, propname); if (!prop) return ERR_PTR(-EINVAL); |
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if (prop->is_array) pointer = prop->pointer.raw_data; else pointer = &prop->value.raw_data; |
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if (!pointer) return ERR_PTR(-ENODATA); if (length > prop->length) return ERR_PTR(-EOVERFLOW); return pointer; } static int pset_prop_read_u8_array(struct property_set *pset, const char *propname, u8 *values, size_t nval) { void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); if (IS_ERR(pointer)) return PTR_ERR(pointer); memcpy(values, pointer, length); return 0; } static int pset_prop_read_u16_array(struct property_set *pset, const char *propname, u16 *values, size_t nval) { void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); if (IS_ERR(pointer)) return PTR_ERR(pointer); memcpy(values, pointer, length); return 0; } static int pset_prop_read_u32_array(struct property_set *pset, const char *propname, u32 *values, size_t nval) { void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); if (IS_ERR(pointer)) return PTR_ERR(pointer); memcpy(values, pointer, length); return 0; } static int pset_prop_read_u64_array(struct property_set *pset, const char *propname, u64 *values, size_t nval) { void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); if (IS_ERR(pointer)) return PTR_ERR(pointer); memcpy(values, pointer, length); return 0; } static int pset_prop_count_elems_of_size(struct property_set *pset, const char *propname, size_t length) { struct property_entry *prop; prop = pset_prop_get(pset, propname); |
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if (!prop) |
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return -EINVAL; |
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return prop->length / length; } static int pset_prop_read_string_array(struct property_set *pset, const char *propname, const char **strings, size_t nval) { void *pointer; size_t length = nval * sizeof(*strings); pointer = pset_prop_find(pset, propname, length); if (IS_ERR(pointer)) return PTR_ERR(pointer); memcpy(strings, pointer, length); |
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return 0; } |
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static int pset_prop_read_string(struct property_set *pset, const char *propname, const char **strings) { struct property_entry *prop; const char **pointer; prop = pset_prop_get(pset, propname); if (!prop) return -EINVAL; if (!prop->is_string) return -EILSEQ; if (prop->is_array) { pointer = prop->pointer.str; if (!pointer) return -ENODATA; } else { pointer = &prop->value.str; if (*pointer && strnlen(*pointer, prop->length) >= prop->length) return -EILSEQ; } *strings = *pointer; return 0; } |
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static inline struct fwnode_handle *dev_fwnode(struct device *dev) { return IS_ENABLED(CONFIG_OF) && dev->of_node ? &dev->of_node->fwnode : dev->fwnode; } |
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/** * device_property_present - check if a property of a device is present * @dev: Device whose property is being checked * @propname: Name of the property * * Check if property @propname is present in the device firmware description. */ bool device_property_present(struct device *dev, const char *propname) { |
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return fwnode_property_present(dev_fwnode(dev), propname); |
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} EXPORT_SYMBOL_GPL(device_property_present); |
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static bool __fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) |
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{ if (is_of_node(fwnode)) |
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return of_property_read_bool(to_of_node(fwnode), propname); |
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else if (is_acpi_node(fwnode)) |
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return !acpi_node_prop_get(fwnode, propname, NULL); |
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else if (is_pset_node(fwnode)) return !!pset_prop_get(to_pset_node(fwnode), propname); |
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return false; |
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} |
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/** * fwnode_property_present - check if a property of a firmware node is present * @fwnode: Firmware node whose property to check * @propname: Name of the property */ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) { bool ret; ret = __fwnode_property_present(fwnode, propname); |
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if (ret == false && !IS_ERR_OR_NULL(fwnode) && !IS_ERR_OR_NULL(fwnode->secondary)) |
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ret = __fwnode_property_present(fwnode->secondary, propname); return ret; } |
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EXPORT_SYMBOL_GPL(fwnode_property_present); |
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/** * device_property_read_u8_array - return a u8 array property of a device * @dev: Device to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Function reads an array of u8 properties with @propname from the device * firmware description and stores them to @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. |
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* %-ENXIO if no suitable firmware interface is present. |
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*/ int device_property_read_u8_array(struct device *dev, const char *propname, u8 *val, size_t nval) { |
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return fwnode_property_read_u8_array(dev_fwnode(dev), propname, val, nval); |
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} EXPORT_SYMBOL_GPL(device_property_read_u8_array); /** * device_property_read_u16_array - return a u16 array property of a device * @dev: Device to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Function reads an array of u16 properties with @propname from the device * firmware description and stores them to @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. |
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* %-ENXIO if no suitable firmware interface is present. |
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*/ int device_property_read_u16_array(struct device *dev, const char *propname, u16 *val, size_t nval) { |
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return fwnode_property_read_u16_array(dev_fwnode(dev), propname, val, nval); |
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} EXPORT_SYMBOL_GPL(device_property_read_u16_array); /** * device_property_read_u32_array - return a u32 array property of a device * @dev: Device to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Function reads an array of u32 properties with @propname from the device * firmware description and stores them to @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. |
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* %-ENXIO if no suitable firmware interface is present. |
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*/ int device_property_read_u32_array(struct device *dev, const char *propname, u32 *val, size_t nval) { |
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return fwnode_property_read_u32_array(dev_fwnode(dev), propname, val, nval); |
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} EXPORT_SYMBOL_GPL(device_property_read_u32_array); /** * device_property_read_u64_array - return a u64 array property of a device * @dev: Device to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Function reads an array of u64 properties with @propname from the device * firmware description and stores them to @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. |
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* %-ENXIO if no suitable firmware interface is present. |
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*/ int device_property_read_u64_array(struct device *dev, const char *propname, u64 *val, size_t nval) { |
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return fwnode_property_read_u64_array(dev_fwnode(dev), propname, val, nval); |
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} EXPORT_SYMBOL_GPL(device_property_read_u64_array); /** * device_property_read_string_array - return a string array property of device * @dev: Device to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Function reads an array of string properties with @propname from the device * firmware description and stores them to @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property is not an array of strings, * %-EOVERFLOW if the size of the property is not as expected. |
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* %-ENXIO if no suitable firmware interface is present. |
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*/ int device_property_read_string_array(struct device *dev, const char *propname, const char **val, size_t nval) { |
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return fwnode_property_read_string_array(dev_fwnode(dev), propname, val, nval); |
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} EXPORT_SYMBOL_GPL(device_property_read_string_array); /** * device_property_read_string - return a string property of a device * @dev: Device to get the property of * @propname: Name of the property * @val: The value is stored here * * Function reads property @propname from the device firmware description and * stores the value into @val if found. The value is checked to be a string. * * Return: %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property type is not a string. |
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* %-ENXIO if no suitable firmware interface is present. |
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*/ int device_property_read_string(struct device *dev, const char *propname, const char **val) { |
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return fwnode_property_read_string(dev_fwnode(dev), propname, val); |
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} EXPORT_SYMBOL_GPL(device_property_read_string); |
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/** * device_property_match_string - find a string in an array and return index * @dev: Device to get the property of * @propname: Name of the property holding the array * @string: String to look for * * Find a given string in a string array and if it is found return the * index back. * * Return: %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of strings, * %-ENXIO if no suitable firmware interface is present. */ int device_property_match_string(struct device *dev, const char *propname, const char *string) { return fwnode_property_match_string(dev_fwnode(dev), propname, string); } EXPORT_SYMBOL_GPL(device_property_match_string); |
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#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \ (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \ |
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: of_property_count_elems_of_size((node), (propname), sizeof(type)) |
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#define PSET_PROP_READ_ARRAY(node, propname, type, val, nval) \ (val) ? pset_prop_read_##type##_array((node), (propname), (val), (nval)) \ : pset_prop_count_elems_of_size((node), (propname), sizeof(type)) |
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#define FWNODE_PROP_READ(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \ |
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({ \ int _ret_; \ if (is_of_node(_fwnode_)) \ _ret_ = OF_DEV_PROP_READ_ARRAY(to_of_node(_fwnode_), _propname_, \ _type_, _val_, _nval_); \ else if (is_acpi_node(_fwnode_)) \ _ret_ = acpi_node_prop_read(_fwnode_, _propname_, _proptype_, \ _val_, _nval_); \ |
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else if (is_pset_node(_fwnode_)) \ |
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_ret_ = PSET_PROP_READ_ARRAY(to_pset_node(_fwnode_), _propname_, \ _type_, _val_, _nval_); \ |
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else \ _ret_ = -ENXIO; \ _ret_; \ |
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}) |
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#define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \ ({ \ int _ret_; \ _ret_ = FWNODE_PROP_READ(_fwnode_, _propname_, _type_, _proptype_, \ _val_, _nval_); \ |
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if (_ret_ == -EINVAL && !IS_ERR_OR_NULL(_fwnode_) && \ !IS_ERR_OR_NULL(_fwnode_->secondary)) \ |
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_ret_ = FWNODE_PROP_READ(_fwnode_->secondary, _propname_, _type_, \ _proptype_, _val_, _nval_); \ _ret_; \ }) |
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/** * fwnode_property_read_u8_array - return a u8 array property of firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Read an array of u8 properties with @propname from @fwnode and stores them to * @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_u8_array(struct fwnode_handle *fwnode, const char *propname, u8 *val, size_t nval) { return FWNODE_PROP_READ_ARRAY(fwnode, propname, u8, DEV_PROP_U8, val, nval); } EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array); /** * fwnode_property_read_u16_array - return a u16 array property of firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Read an array of u16 properties with @propname from @fwnode and store them to * @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_u16_array(struct fwnode_handle *fwnode, const char *propname, u16 *val, size_t nval) { return FWNODE_PROP_READ_ARRAY(fwnode, propname, u16, DEV_PROP_U16, val, nval); } EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array); /** * fwnode_property_read_u32_array - return a u32 array property of firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Read an array of u32 properties with @propname from @fwnode store them to * @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_u32_array(struct fwnode_handle *fwnode, const char *propname, u32 *val, size_t nval) { return FWNODE_PROP_READ_ARRAY(fwnode, propname, u32, DEV_PROP_U32, val, nval); } EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array); /** * fwnode_property_read_u64_array - return a u64 array property firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property |
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* @val: The values are stored here or %NULL to return the number of values |
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* @nval: Size of the @val array * * Read an array of u64 properties with @propname from @fwnode and store them to * @val if found. * |
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* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
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* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_u64_array(struct fwnode_handle *fwnode, const char *propname, u64 *val, size_t nval) { return FWNODE_PROP_READ_ARRAY(fwnode, propname, u64, DEV_PROP_U64, val, nval); } EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array); |
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static int __fwnode_property_read_string_array(struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval) { if (is_of_node(fwnode)) return val ? of_property_read_string_array(to_of_node(fwnode), propname, val, nval) : of_property_count_strings(to_of_node(fwnode), propname); else if (is_acpi_node(fwnode)) return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, val, nval); else if (is_pset_node(fwnode)) return val ? pset_prop_read_string_array(to_pset_node(fwnode), propname, val, nval) : pset_prop_count_elems_of_size(to_pset_node(fwnode), propname, sizeof(const char *)); return -ENXIO; } static int __fwnode_property_read_string(struct fwnode_handle *fwnode, const char *propname, const char **val) { if (is_of_node(fwnode)) return of_property_read_string(to_of_node(fwnode), propname, val); else if (is_acpi_node(fwnode)) return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, val, 1); else if (is_pset_node(fwnode)) return pset_prop_read_string(to_pset_node(fwnode), propname, val); return -ENXIO; } |
8a0662d9e
|
564 565 566 567 |
/** * fwnode_property_read_string_array - return string array property of a node * @fwnode: Firmware node to get the property of * @propname: Name of the property |
5c0acf3b4
|
568 |
* @val: The values are stored here or %NULL to return the number of values |
8a0662d9e
|
569 570 571 572 573 |
* @nval: Size of the @val array * * Read an string list property @propname from the given firmware node and store * them to @val if found. * |
5c0acf3b4
|
574 575 |
* Return: number of values if @val was %NULL, * %0 if the property was found (success), |
8a0662d9e
|
576 577 578 579 580 581 582 583 584 585 |
* %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of strings, * %-EOVERFLOW if the size of the property is not as expected, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_string_array(struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval) { |
362c0b302
|
586 587 588 |
int ret; ret = __fwnode_property_read_string_array(fwnode, propname, val, nval); |
0d67e0fa1
|
589 590 |
if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) && !IS_ERR_OR_NULL(fwnode->secondary)) |
362c0b302
|
591 592 593 |
ret = __fwnode_property_read_string_array(fwnode->secondary, propname, val, nval); return ret; |
8a0662d9e
|
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 |
} EXPORT_SYMBOL_GPL(fwnode_property_read_string_array); /** * fwnode_property_read_string - return a string property of a firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property * @val: The value is stored here * * Read property @propname from the given firmware node and store the value into * @val if found. The value is checked to be a string. * * Return: %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property is not a string, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_read_string(struct fwnode_handle *fwnode, const char *propname, const char **val) { |
362c0b302
|
615 616 617 |
int ret; ret = __fwnode_property_read_string(fwnode, propname, val); |
0d67e0fa1
|
618 619 |
if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) && !IS_ERR_OR_NULL(fwnode->secondary)) |
362c0b302
|
620 621 622 |
ret = __fwnode_property_read_string(fwnode->secondary, propname, val); return ret; |
8a0662d9e
|
623 624 625 626 |
} EXPORT_SYMBOL_GPL(fwnode_property_read_string); /** |
3f5c8d318
|
627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 |
* fwnode_property_match_string - find a string in an array and return index * @fwnode: Firmware node to get the property of * @propname: Name of the property holding the array * @string: String to look for * * Find a given string in a string array and if it is found return the * index back. * * Return: %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of strings, * %-ENXIO if no suitable firmware interface is present. */ int fwnode_property_match_string(struct fwnode_handle *fwnode, const char *propname, const char *string) { const char **values; |
a7c1d0a98
|
645 |
int nval, ret; |
3f5c8d318
|
646 647 648 649 |
nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0); if (nval < 0) return nval; |
f6740c189
|
650 651 |
if (nval == 0) return -ENODATA; |
3f5c8d318
|
652 653 654 655 656 657 658 |
values = kcalloc(nval, sizeof(*values), GFP_KERNEL); if (!values) return -ENOMEM; ret = fwnode_property_read_string_array(fwnode, propname, values, nval); if (ret < 0) goto out; |
a7c1d0a98
|
659 660 661 |
ret = match_string(values, nval, string); if (ret < 0) ret = -ENODATA; |
3f5c8d318
|
662 663 664 665 666 667 668 |
out: kfree(values); return ret; } EXPORT_SYMBOL_GPL(fwnode_property_match_string); /** |
13141e1cb
|
669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 |
* pset_free_set - releases memory allocated for copied property set * @pset: Property set to release * * Function takes previously copied property set and releases all the * memory allocated to it. */ static void pset_free_set(struct property_set *pset) { const struct property_entry *prop; size_t i, nval; if (!pset) return; for (prop = pset->properties; prop->name; prop++) { if (prop->is_array) { if (prop->is_string && prop->pointer.str) { nval = prop->length / sizeof(const char *); for (i = 0; i < nval; i++) kfree(prop->pointer.str[i]); } kfree(prop->pointer.raw_data); } else if (prop->is_string) { kfree(prop->value.str); } kfree(prop->name); } kfree(pset->properties); kfree(pset); } static int pset_copy_entry(struct property_entry *dst, const struct property_entry *src) { const char **d, **s; size_t i, nval; dst->name = kstrdup(src->name, GFP_KERNEL); if (!dst->name) return -ENOMEM; if (src->is_array) { |
f6740c189
|
712 713 |
if (!src->length) return -ENODATA; |
13141e1cb
|
714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 |
if (src->is_string) { nval = src->length / sizeof(const char *); dst->pointer.str = kcalloc(nval, sizeof(const char *), GFP_KERNEL); if (!dst->pointer.str) return -ENOMEM; d = dst->pointer.str; s = src->pointer.str; for (i = 0; i < nval; i++) { d[i] = kstrdup(s[i], GFP_KERNEL); if (!d[i] && s[i]) return -ENOMEM; } } else { dst->pointer.raw_data = kmemdup(src->pointer.raw_data, src->length, GFP_KERNEL); if (!dst->pointer.raw_data) return -ENOMEM; } } else if (src->is_string) { dst->value.str = kstrdup(src->value.str, GFP_KERNEL); if (!dst->value.str && src->value.str) return -ENOMEM; } else { dst->value.raw_data = src->value.raw_data; } dst->length = src->length; dst->is_array = src->is_array; dst->is_string = src->is_string; return 0; } /** * pset_copy_set - copies property set * @pset: Property set to copy * * This function takes a deep copy of the given property set and returns * pointer to the copy. Call device_free_property_set() to free resources * allocated in this function. * * Return: Pointer to the new property set or error pointer. */ static struct property_set *pset_copy_set(const struct property_set *pset) { const struct property_entry *entry; struct property_set *p; size_t i, n = 0; p = kzalloc(sizeof(*p), GFP_KERNEL); if (!p) return ERR_PTR(-ENOMEM); while (pset->properties[n].name) n++; p->properties = kcalloc(n + 1, sizeof(*entry), GFP_KERNEL); if (!p->properties) { kfree(p); return ERR_PTR(-ENOMEM); } for (i = 0; i < n; i++) { int ret = pset_copy_entry(&p->properties[i], &pset->properties[i]); if (ret) { pset_free_set(p); return ERR_PTR(ret); } } return p; } /** |
f4d052660
|
791 |
* device_remove_properties - Remove properties from a device object. |
13141e1cb
|
792 793 794 |
* @dev: Device whose properties to remove. * * The function removes properties previously associated to the device |
f4d052660
|
795 |
* secondary firmware node with device_add_properties(). Memory allocated |
13141e1cb
|
796 797 |
* to the properties will also be released. */ |
f4d052660
|
798 |
void device_remove_properties(struct device *dev) |
13141e1cb
|
799 800 801 802 803 804 805 806 807 808 809 |
{ struct fwnode_handle *fwnode; fwnode = dev_fwnode(dev); if (!fwnode) return; /* * Pick either primary or secondary node depending which one holds * the pset. If there is no real firmware node (ACPI/DT) primary * will hold the pset. */ |
0d67e0fa1
|
810 811 |
if (is_pset_node(fwnode)) { set_primary_fwnode(dev, NULL); |
13141e1cb
|
812 |
pset_free_set(to_pset_node(fwnode)); |
0d67e0fa1
|
813 814 815 816 817 818 819 |
} else { fwnode = fwnode->secondary; if (!IS_ERR(fwnode) && is_pset_node(fwnode)) { set_secondary_fwnode(dev, NULL); pset_free_set(to_pset_node(fwnode)); } } |
13141e1cb
|
820 |
} |
f4d052660
|
821 |
EXPORT_SYMBOL_GPL(device_remove_properties); |
13141e1cb
|
822 823 |
/** |
f4d052660
|
824 |
* device_add_properties - Add a collection of properties to a device object. |
13141e1cb
|
825 |
* @dev: Device to add properties to. |
f4d052660
|
826 |
* @properties: Collection of properties to add. |
13141e1cb
|
827 |
* |
f4d052660
|
828 829 830 |
* Associate a collection of device properties represented by @properties with * @dev as its secondary firmware node. The function takes a copy of * @properties. |
13141e1cb
|
831 |
*/ |
f4d052660
|
832 |
int device_add_properties(struct device *dev, struct property_entry *properties) |
13141e1cb
|
833 |
{ |
f4d052660
|
834 |
struct property_set *p, pset; |
13141e1cb
|
835 |
|
f4d052660
|
836 |
if (!properties) |
13141e1cb
|
837 |
return -EINVAL; |
f4d052660
|
838 839 840 |
pset.properties = properties; p = pset_copy_set(&pset); |
13141e1cb
|
841 842 843 844 845 846 847 |
if (IS_ERR(p)) return PTR_ERR(p); p->fwnode.type = FWNODE_PDATA; set_secondary_fwnode(dev, &p->fwnode); return 0; } |
f4d052660
|
848 |
EXPORT_SYMBOL_GPL(device_add_properties); |
13141e1cb
|
849 850 |
/** |
8a0662d9e
|
851 852 853 854 855 856 857 858 859 |
* device_get_next_child_node - Return the next child node handle for a device * @dev: Device to find the next child node for. * @child: Handle to one of the device's child nodes or a null handle. */ struct fwnode_handle *device_get_next_child_node(struct device *dev, struct fwnode_handle *child) { if (IS_ENABLED(CONFIG_OF) && dev->of_node) { struct device_node *node; |
c181fb3e7
|
860 |
node = of_get_next_available_child(dev->of_node, to_of_node(child)); |
8a0662d9e
|
861 862 863 |
if (node) return &node->fwnode; } else if (IS_ENABLED(CONFIG_ACPI)) { |
504a33749
|
864 |
return acpi_get_next_subnode(dev, child); |
8a0662d9e
|
865 866 867 868 869 870 |
} return NULL; } EXPORT_SYMBOL_GPL(device_get_next_child_node); /** |
613e97218
|
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 |
* device_get_named_child_node - Return first matching named child node handle * @dev: Device to find the named child node for. * @childname: String to match child node name against. */ struct fwnode_handle *device_get_named_child_node(struct device *dev, const char *childname) { struct fwnode_handle *child; /* * Find first matching named child node of this device. * For ACPI this will be a data only sub-node. */ device_for_each_child_node(dev, child) { if (is_of_node(child)) { if (!of_node_cmp(to_of_node(child)->name, childname)) return child; } else if (is_acpi_data_node(child)) { if (acpi_data_node_match(child, childname)) return child; } } return NULL; } EXPORT_SYMBOL_GPL(device_get_named_child_node); /** |
8a0662d9e
|
899 900 901 902 903 904 905 906 907 908 |
* fwnode_handle_put - Drop reference to a device node * @fwnode: Pointer to the device node to drop the reference to. * * This has to be used when terminating device_for_each_child_node() iteration * with break or return to prevent stale device node references from being left * behind. */ void fwnode_handle_put(struct fwnode_handle *fwnode) { if (is_of_node(fwnode)) |
c181fb3e7
|
909 |
of_node_put(to_of_node(fwnode)); |
8a0662d9e
|
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 |
} EXPORT_SYMBOL_GPL(fwnode_handle_put); /** * device_get_child_node_count - return the number of child nodes for device * @dev: Device to cound the child nodes for */ unsigned int device_get_child_node_count(struct device *dev) { struct fwnode_handle *child; unsigned int count = 0; device_for_each_child_node(dev, child) count++; return count; } EXPORT_SYMBOL_GPL(device_get_child_node_count); |
05ca55600
|
928 |
|
e5e558644
|
929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 |
bool device_dma_supported(struct device *dev) { /* For DT, this is always supported. * For ACPI, this depends on CCA, which * is determined by the acpi_dma_supported(). */ if (IS_ENABLED(CONFIG_OF) && dev->of_node) return true; return acpi_dma_supported(ACPI_COMPANION(dev)); } EXPORT_SYMBOL_GPL(device_dma_supported); enum dev_dma_attr device_get_dma_attr(struct device *dev) { enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED; if (IS_ENABLED(CONFIG_OF) && dev->of_node) { if (of_dma_is_coherent(dev->of_node)) attr = DEV_DMA_COHERENT; else attr = DEV_DMA_NON_COHERENT; } else attr = acpi_get_dma_attr(ACPI_COMPANION(dev)); return attr; } EXPORT_SYMBOL_GPL(device_get_dma_attr); |
4c96b7dc0
|
957 |
/** |
2f710a3a8
|
958 |
* device_get_phy_mode - Get phy mode for given device |
4c96b7dc0
|
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 |
* @dev: Pointer to the given device * * The function gets phy interface string from property 'phy-mode' or * 'phy-connection-type', and return its index in phy_modes table, or errno in * error case. */ int device_get_phy_mode(struct device *dev) { const char *pm; int err, i; err = device_property_read_string(dev, "phy-mode", &pm); if (err < 0) err = device_property_read_string(dev, "phy-connection-type", &pm); if (err < 0) return err; for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) if (!strcasecmp(pm, phy_modes(i))) return i; return -ENODEV; } EXPORT_SYMBOL_GPL(device_get_phy_mode); static void *device_get_mac_addr(struct device *dev, const char *name, char *addr, int alen) { int ret = device_property_read_u8_array(dev, name, addr, alen); |
2f710a3a8
|
990 |
if (ret == 0 && alen == ETH_ALEN && is_valid_ether_addr(addr)) |
4c96b7dc0
|
991 992 993 994 995 |
return addr; return NULL; } /** |
2f710a3a8
|
996 997 998 999 1000 1001 |
* device_get_mac_address - Get the MAC for a given device * @dev: Pointer to the device * @addr: Address of buffer to store the MAC in * @alen: Length of the buffer pointed to by addr, should be ETH_ALEN * * Search the firmware node for the best MAC address to use. 'mac-address' is |
4c96b7dc0
|
1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 |
* checked first, because that is supposed to contain to "most recent" MAC * address. If that isn't set, then 'local-mac-address' is checked next, * because that is the default address. If that isn't set, then the obsolete * 'address' is checked, just in case we're using an old device tree. * * Note that the 'address' property is supposed to contain a virtual address of * the register set, but some DTS files have redefined that property to be the * MAC address. * * All-zero MAC addresses are rejected, because those could be properties that |
2f710a3a8
|
1012 1013 1014 1015 1016 |
* exist in the firmware tables, but were not updated by the firmware. For * example, the DTS could define 'mac-address' and 'local-mac-address', with * zero MAC addresses. Some older U-Boots only initialized 'local-mac-address'. * In this case, the real MAC is in 'local-mac-address', and 'mac-address' * exists but is all zeros. |
4c96b7dc0
|
1017 1018 1019 |
*/ void *device_get_mac_address(struct device *dev, char *addr, int alen) { |
5b902d6f9
|
1020 |
char *res; |
4c96b7dc0
|
1021 |
|
5b902d6f9
|
1022 1023 1024 1025 1026 1027 1028 |
res = device_get_mac_addr(dev, "mac-address", addr, alen); if (res) return res; res = device_get_mac_addr(dev, "local-mac-address", addr, alen); if (res) return res; |
4c96b7dc0
|
1029 1030 1031 1032 |
return device_get_mac_addr(dev, "address", addr, alen); } EXPORT_SYMBOL(device_get_mac_address); |