forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1333 lines
42 KiB
1333 lines
42 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* property.c - Unified device property interface. |
|
* |
|
* Copyright (C) 2014, Intel Corporation |
|
* Authors: Rafael J. Wysocki <[email protected]> |
|
* Mika Westerberg <[email protected]> |
|
*/ |
|
|
|
#include <linux/acpi.h> |
|
#include <linux/export.h> |
|
#include <linux/kernel.h> |
|
#include <linux/of.h> |
|
#include <linux/of_address.h> |
|
#include <linux/of_graph.h> |
|
#include <linux/of_irq.h> |
|
#include <linux/property.h> |
|
#include <linux/etherdevice.h> |
|
#include <linux/phy.h> |
|
|
|
struct fwnode_handle *dev_fwnode(struct device *dev) |
|
{ |
|
return IS_ENABLED(CONFIG_OF) && dev->of_node ? |
|
of_fwnode_handle(dev->of_node) : dev->fwnode; |
|
} |
|
EXPORT_SYMBOL_GPL(dev_fwnode); |
|
|
|
/** |
|
* 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) |
|
{ |
|
return fwnode_property_present(dev_fwnode(dev), propname); |
|
} |
|
EXPORT_SYMBOL_GPL(device_property_present); |
|
|
|
/** |
|
* 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(const struct fwnode_handle *fwnode, |
|
const char *propname) |
|
{ |
|
bool ret; |
|
|
|
ret = fwnode_call_bool_op(fwnode, property_present, propname); |
|
if (ret == false && !IS_ERR_OR_NULL(fwnode) && |
|
!IS_ERR_OR_NULL(fwnode->secondary)) |
|
ret = fwnode_call_bool_op(fwnode->secondary, property_present, |
|
propname); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_property_present); |
|
|
|
/** |
|
* 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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @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. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 numbers, |
|
* %-EOVERFLOW if the size of the property is not as expected. |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int device_property_read_u8_array(struct device *dev, const char *propname, |
|
u8 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_u8_array(dev_fwnode(dev), propname, val, nval); |
|
} |
|
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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @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. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 numbers, |
|
* %-EOVERFLOW if the size of the property is not as expected. |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int device_property_read_u16_array(struct device *dev, const char *propname, |
|
u16 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_u16_array(dev_fwnode(dev), propname, val, nval); |
|
} |
|
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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @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. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 numbers, |
|
* %-EOVERFLOW if the size of the property is not as expected. |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int device_property_read_u32_array(struct device *dev, const char *propname, |
|
u32 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_u32_array(dev_fwnode(dev), propname, val, nval); |
|
} |
|
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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @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. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 numbers, |
|
* %-EOVERFLOW if the size of the property is not as expected. |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int device_property_read_u64_array(struct device *dev, const char *propname, |
|
u64 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_u64_array(dev_fwnode(dev), propname, val, nval); |
|
} |
|
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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @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. |
|
* |
|
* Return: number of values read on success if @val is non-NULL, |
|
* number of values available on success if @val is NULL, |
|
* %-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. |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int device_property_read_string_array(struct device *dev, const char *propname, |
|
const char **val, size_t nval) |
|
{ |
|
return fwnode_property_read_string_array(dev_fwnode(dev), propname, val, nval); |
|
} |
|
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. |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int device_property_read_string(struct device *dev, const char *propname, |
|
const char **val) |
|
{ |
|
return fwnode_property_read_string(dev_fwnode(dev), propname, val); |
|
} |
|
EXPORT_SYMBOL_GPL(device_property_read_string); |
|
|
|
/** |
|
* 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); |
|
|
|
static int fwnode_property_read_int_array(const struct fwnode_handle *fwnode, |
|
const char *propname, |
|
unsigned int elem_size, void *val, |
|
size_t nval) |
|
{ |
|
int ret; |
|
|
|
ret = fwnode_call_int_op(fwnode, property_read_int_array, propname, |
|
elem_size, val, nval); |
|
if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) && |
|
!IS_ERR_OR_NULL(fwnode->secondary)) |
|
ret = fwnode_call_int_op( |
|
fwnode->secondary, property_read_int_array, propname, |
|
elem_size, val, nval); |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* 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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @nval: Size of the @val array |
|
* |
|
* Read an array of u8 properties with @propname from @fwnode and stores them to |
|
* @val if found. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 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(const struct fwnode_handle *fwnode, |
|
const char *propname, u8 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_int_array(fwnode, propname, sizeof(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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @nval: Size of the @val array |
|
* |
|
* Read an array of u16 properties with @propname from @fwnode and store them to |
|
* @val if found. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 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(const struct fwnode_handle *fwnode, |
|
const char *propname, u16 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_int_array(fwnode, propname, sizeof(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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @nval: Size of the @val array |
|
* |
|
* Read an array of u32 properties with @propname from @fwnode store them to |
|
* @val if found. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 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(const struct fwnode_handle *fwnode, |
|
const char *propname, u32 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_int_array(fwnode, propname, sizeof(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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @nval: Size of the @val array |
|
* |
|
* Read an array of u64 properties with @propname from @fwnode and store them to |
|
* @val if found. |
|
* |
|
* Return: number of values if @val was %NULL, |
|
* %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 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(const struct fwnode_handle *fwnode, |
|
const char *propname, u64 *val, size_t nval) |
|
{ |
|
return fwnode_property_read_int_array(fwnode, propname, sizeof(u64), |
|
val, nval); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array); |
|
|
|
/** |
|
* 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 |
|
* @val: The values are stored here or %NULL to return the number of values |
|
* @nval: Size of the @val array |
|
* |
|
* Read an string list property @propname from the given firmware node and store |
|
* them to @val if found. |
|
* |
|
* Return: number of values read on success if @val is non-NULL, |
|
* number of values available on success if @val is NULL, |
|
* %-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, |
|
* %-ENXIO if no suitable firmware interface is present. |
|
*/ |
|
int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, |
|
const char *propname, const char **val, |
|
size_t nval) |
|
{ |
|
int ret; |
|
|
|
ret = fwnode_call_int_op(fwnode, property_read_string_array, propname, |
|
val, nval); |
|
if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) && |
|
!IS_ERR_OR_NULL(fwnode->secondary)) |
|
ret = fwnode_call_int_op(fwnode->secondary, |
|
property_read_string_array, propname, |
|
val, nval); |
|
return ret; |
|
} |
|
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(const struct fwnode_handle *fwnode, |
|
const char *propname, const char **val) |
|
{ |
|
int ret = fwnode_property_read_string_array(fwnode, propname, val, 1); |
|
|
|
return ret < 0 ? ret : 0; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_property_read_string); |
|
|
|
/** |
|
* 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(const struct fwnode_handle *fwnode, |
|
const char *propname, const char *string) |
|
{ |
|
const char **values; |
|
int nval, ret; |
|
|
|
nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0); |
|
if (nval < 0) |
|
return nval; |
|
|
|
if (nval == 0) |
|
return -ENODATA; |
|
|
|
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; |
|
|
|
ret = match_string(values, nval, string); |
|
if (ret < 0) |
|
ret = -ENODATA; |
|
out: |
|
kfree(values); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_property_match_string); |
|
|
|
/** |
|
* fwnode_property_get_reference_args() - Find a reference with arguments |
|
* @fwnode: Firmware node where to look for the reference |
|
* @prop: The name of the property |
|
* @nargs_prop: The name of the property telling the number of |
|
* arguments in the referred node. NULL if @nargs is known, |
|
* otherwise @nargs is ignored. Only relevant on OF. |
|
* @nargs: Number of arguments. Ignored if @nargs_prop is non-NULL. |
|
* @index: Index of the reference, from zero onwards. |
|
* @args: Result structure with reference and integer arguments. |
|
* |
|
* Obtain a reference based on a named property in an fwnode, with |
|
* integer arguments. |
|
* |
|
* Caller is responsible to call fwnode_handle_put() on the returned |
|
* args->fwnode pointer. |
|
* |
|
* Returns: %0 on success |
|
* %-ENOENT when the index is out of bounds, the index has an empty |
|
* reference or the property was not found |
|
* %-EINVAL on parse error |
|
*/ |
|
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) |
|
{ |
|
return fwnode_call_int_op(fwnode, get_reference_args, prop, nargs_prop, |
|
nargs, index, args); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args); |
|
|
|
/** |
|
* fwnode_find_reference - Find named reference to a fwnode_handle |
|
* @fwnode: Firmware node where to look for the reference |
|
* @name: The name of the reference |
|
* @index: Index of the reference |
|
* |
|
* @index can be used when the named reference holds a table of references. |
|
* |
|
* Returns pointer to the reference fwnode, or ERR_PTR. Caller is responsible to |
|
* call fwnode_handle_put() on the returned fwnode pointer. |
|
*/ |
|
struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, |
|
const char *name, |
|
unsigned int index) |
|
{ |
|
struct fwnode_reference_args args; |
|
int ret; |
|
|
|
ret = fwnode_property_get_reference_args(fwnode, name, NULL, 0, index, |
|
&args); |
|
return ret ? ERR_PTR(ret) : args.fwnode; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_find_reference); |
|
|
|
/** |
|
* device_remove_properties - Remove properties from a device object. |
|
* @dev: Device whose properties to remove. |
|
* |
|
* The function removes properties previously associated to the device |
|
* firmware node with device_add_properties(). Memory allocated to the |
|
* properties will also be released. |
|
*/ |
|
void device_remove_properties(struct device *dev) |
|
{ |
|
struct fwnode_handle *fwnode = dev_fwnode(dev); |
|
|
|
if (!fwnode) |
|
return; |
|
|
|
if (is_software_node(fwnode->secondary)) { |
|
fwnode_remove_software_node(fwnode->secondary); |
|
set_secondary_fwnode(dev, NULL); |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(device_remove_properties); |
|
|
|
/** |
|
* device_add_properties - Add a collection of properties to a device object. |
|
* @dev: Device to add properties to. |
|
* @properties: Collection of properties to add. |
|
* |
|
* Associate a collection of device properties represented by @properties with |
|
* @dev. The function takes a copy of @properties. |
|
* |
|
* WARNING: The callers should not use this function if it is known that there |
|
* is no real firmware node associated with @dev! In that case the callers |
|
* should create a software node and assign it to @dev directly. |
|
*/ |
|
int device_add_properties(struct device *dev, |
|
const struct property_entry *properties) |
|
{ |
|
struct fwnode_handle *fwnode; |
|
|
|
fwnode = fwnode_create_software_node(properties, NULL); |
|
if (IS_ERR(fwnode)) |
|
return PTR_ERR(fwnode); |
|
|
|
set_secondary_fwnode(dev, fwnode); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(device_add_properties); |
|
|
|
/** |
|
* fwnode_get_name - Return the name of a node |
|
* @fwnode: The firmware node |
|
* |
|
* Returns a pointer to the node name. |
|
*/ |
|
const char *fwnode_get_name(const struct fwnode_handle *fwnode) |
|
{ |
|
return fwnode_call_ptr_op(fwnode, get_name); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_name); |
|
|
|
/** |
|
* fwnode_get_name_prefix - Return the prefix of node for printing purposes |
|
* @fwnode: The firmware node |
|
* |
|
* Returns the prefix of a node, intended to be printed right before the node. |
|
* The prefix works also as a separator between the nodes. |
|
*/ |
|
const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode) |
|
{ |
|
return fwnode_call_ptr_op(fwnode, get_name_prefix); |
|
} |
|
|
|
/** |
|
* fwnode_get_parent - Return parent firwmare node |
|
* @fwnode: Firmware whose parent is retrieved |
|
* |
|
* Return parent firmware node of the given node if possible or %NULL if no |
|
* parent was available. |
|
*/ |
|
struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode) |
|
{ |
|
return fwnode_call_ptr_op(fwnode, get_parent); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_parent); |
|
|
|
/** |
|
* fwnode_get_next_parent - Iterate to the node's parent |
|
* @fwnode: Firmware whose parent is retrieved |
|
* |
|
* This is like fwnode_get_parent() except that it drops the refcount |
|
* on the passed node, making it suitable for iterating through a |
|
* node's parents. |
|
* |
|
* Returns a node pointer with refcount incremented, use |
|
* fwnode_handle_node() on it when done. |
|
*/ |
|
struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode) |
|
{ |
|
struct fwnode_handle *parent = fwnode_get_parent(fwnode); |
|
|
|
fwnode_handle_put(fwnode); |
|
|
|
return parent; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_next_parent); |
|
|
|
/** |
|
* fwnode_get_next_parent_dev - Find device of closest ancestor fwnode |
|
* @fwnode: firmware node |
|
* |
|
* Given a firmware node (@fwnode), this function finds its closest ancestor |
|
* firmware node that has a corresponding struct device and returns that struct |
|
* device. |
|
* |
|
* The caller of this function is expected to call put_device() on the returned |
|
* device when they are done. |
|
*/ |
|
struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode) |
|
{ |
|
struct device *dev; |
|
|
|
fwnode_handle_get(fwnode); |
|
do { |
|
fwnode = fwnode_get_next_parent(fwnode); |
|
if (!fwnode) |
|
return NULL; |
|
dev = get_dev_from_fwnode(fwnode); |
|
} while (!dev); |
|
fwnode_handle_put(fwnode); |
|
return dev; |
|
} |
|
|
|
/** |
|
* fwnode_count_parents - Return the number of parents a node has |
|
* @fwnode: The node the parents of which are to be counted |
|
* |
|
* Returns the number of parents a node has. |
|
*/ |
|
unsigned int fwnode_count_parents(const struct fwnode_handle *fwnode) |
|
{ |
|
struct fwnode_handle *__fwnode; |
|
unsigned int count; |
|
|
|
__fwnode = fwnode_get_parent(fwnode); |
|
|
|
for (count = 0; __fwnode; count++) |
|
__fwnode = fwnode_get_next_parent(__fwnode); |
|
|
|
return count; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_count_parents); |
|
|
|
/** |
|
* fwnode_get_nth_parent - Return an nth parent of a node |
|
* @fwnode: The node the parent of which is requested |
|
* @depth: Distance of the parent from the node |
|
* |
|
* Returns the nth parent of a node. If there is no parent at the requested |
|
* @depth, %NULL is returned. If @depth is 0, the functionality is equivalent to |
|
* fwnode_handle_get(). For @depth == 1, it is fwnode_get_parent() and so on. |
|
* |
|
* The caller is responsible for calling fwnode_handle_put() for the returned |
|
* node. |
|
*/ |
|
struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwnode, |
|
unsigned int depth) |
|
{ |
|
unsigned int i; |
|
|
|
fwnode_handle_get(fwnode); |
|
|
|
for (i = 0; i < depth && fwnode; i++) |
|
fwnode = fwnode_get_next_parent(fwnode); |
|
|
|
return fwnode; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_nth_parent); |
|
|
|
/** |
|
* fwnode_is_ancestor_of - Test if @test_ancestor is ancestor of @test_child |
|
* @test_ancestor: Firmware which is tested for being an ancestor |
|
* @test_child: Firmware which is tested for being the child |
|
* |
|
* A node is considered an ancestor of itself too. |
|
* |
|
* Returns true if @test_ancestor is an ancestor of @test_child. |
|
* Otherwise, returns false. |
|
*/ |
|
bool fwnode_is_ancestor_of(struct fwnode_handle *test_ancestor, |
|
struct fwnode_handle *test_child) |
|
{ |
|
if (!test_ancestor) |
|
return false; |
|
|
|
fwnode_handle_get(test_child); |
|
while (test_child) { |
|
if (test_child == test_ancestor) { |
|
fwnode_handle_put(test_child); |
|
return true; |
|
} |
|
test_child = fwnode_get_next_parent(test_child); |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* fwnode_get_next_child_node - Return the next child node handle for a node |
|
* @fwnode: Firmware node to find the next child node for. |
|
* @child: Handle to one of the node's child nodes or a %NULL handle. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_get_next_child_node(const struct fwnode_handle *fwnode, |
|
struct fwnode_handle *child) |
|
{ |
|
return fwnode_call_ptr_op(fwnode, get_next_child_node, child); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_next_child_node); |
|
|
|
/** |
|
* fwnode_get_next_available_child_node - Return the next |
|
* available child node handle for a node |
|
* @fwnode: Firmware node to find the next child node for. |
|
* @child: Handle to one of the node's child nodes or a %NULL handle. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_get_next_available_child_node(const struct fwnode_handle *fwnode, |
|
struct fwnode_handle *child) |
|
{ |
|
struct fwnode_handle *next_child = child; |
|
|
|
if (!fwnode) |
|
return NULL; |
|
|
|
do { |
|
next_child = fwnode_get_next_child_node(fwnode, next_child); |
|
if (!next_child) |
|
return NULL; |
|
} while (!fwnode_device_is_available(next_child)); |
|
|
|
return next_child; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_next_available_child_node); |
|
|
|
/** |
|
* 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) |
|
{ |
|
const struct fwnode_handle *fwnode = dev_fwnode(dev); |
|
struct fwnode_handle *next; |
|
|
|
/* Try to find a child in primary fwnode */ |
|
next = fwnode_get_next_child_node(fwnode, child); |
|
if (next) |
|
return next; |
|
|
|
/* When no more children in primary, continue with secondary */ |
|
if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) |
|
next = fwnode_get_next_child_node(fwnode->secondary, child); |
|
|
|
return next; |
|
} |
|
EXPORT_SYMBOL_GPL(device_get_next_child_node); |
|
|
|
/** |
|
* fwnode_get_named_child_node - Return first matching named child node handle |
|
* @fwnode: Firmware node to find the named child node for. |
|
* @childname: String to match child node name against. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_get_named_child_node(const struct fwnode_handle *fwnode, |
|
const char *childname) |
|
{ |
|
return fwnode_call_ptr_op(fwnode, get_named_child_node, childname); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_get_named_child_node); |
|
|
|
/** |
|
* 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) |
|
{ |
|
return fwnode_get_named_child_node(dev_fwnode(dev), childname); |
|
} |
|
EXPORT_SYMBOL_GPL(device_get_named_child_node); |
|
|
|
/** |
|
* fwnode_handle_get - Obtain a reference to a device node |
|
* @fwnode: Pointer to the device node to obtain the reference to. |
|
* |
|
* Returns the fwnode handle. |
|
*/ |
|
struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode) |
|
{ |
|
if (!fwnode_has_op(fwnode, get)) |
|
return fwnode; |
|
|
|
return fwnode_call_ptr_op(fwnode, get); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_handle_get); |
|
|
|
/** |
|
* 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) |
|
{ |
|
fwnode_call_void_op(fwnode, put); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_handle_put); |
|
|
|
/** |
|
* fwnode_device_is_available - check if a device is available for use |
|
* @fwnode: Pointer to the fwnode of the device. |
|
* |
|
* For fwnode node types that don't implement the .device_is_available() |
|
* operation, this function returns true. |
|
*/ |
|
bool fwnode_device_is_available(const struct fwnode_handle *fwnode) |
|
{ |
|
if (!fwnode_has_op(fwnode, device_is_available)) |
|
return true; |
|
|
|
return fwnode_call_bool_op(fwnode, device_is_available); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_device_is_available); |
|
|
|
/** |
|
* 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); |
|
|
|
bool device_dma_supported(struct device *dev) |
|
{ |
|
const struct fwnode_handle *fwnode = dev_fwnode(dev); |
|
|
|
/* For DT, this is always supported. |
|
* For ACPI, this depends on CCA, which |
|
* is determined by the acpi_dma_supported(). |
|
*/ |
|
if (is_of_node(fwnode)) |
|
return true; |
|
|
|
return acpi_dma_supported(to_acpi_device_node(fwnode)); |
|
} |
|
EXPORT_SYMBOL_GPL(device_dma_supported); |
|
|
|
enum dev_dma_attr device_get_dma_attr(struct device *dev) |
|
{ |
|
const struct fwnode_handle *fwnode = dev_fwnode(dev); |
|
enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED; |
|
|
|
if (is_of_node(fwnode)) { |
|
if (of_dma_is_coherent(to_of_node(fwnode))) |
|
attr = DEV_DMA_COHERENT; |
|
else |
|
attr = DEV_DMA_NON_COHERENT; |
|
} else |
|
attr = acpi_get_dma_attr(to_acpi_device_node(fwnode)); |
|
|
|
return attr; |
|
} |
|
EXPORT_SYMBOL_GPL(device_get_dma_attr); |
|
|
|
/** |
|
* fwnode_get_phy_mode - Get phy mode for given firmware node |
|
* @fwnode: Pointer to the given node |
|
* |
|
* 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 fwnode_get_phy_mode(struct fwnode_handle *fwnode) |
|
{ |
|
const char *pm; |
|
int err, i; |
|
|
|
err = fwnode_property_read_string(fwnode, "phy-mode", &pm); |
|
if (err < 0) |
|
err = fwnode_property_read_string(fwnode, |
|
"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(fwnode_get_phy_mode); |
|
|
|
/** |
|
* device_get_phy_mode - Get phy mode for given device |
|
* @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) |
|
{ |
|
return fwnode_get_phy_mode(dev_fwnode(dev)); |
|
} |
|
EXPORT_SYMBOL_GPL(device_get_phy_mode); |
|
|
|
static void *fwnode_get_mac_addr(struct fwnode_handle *fwnode, |
|
const char *name, char *addr, |
|
int alen) |
|
{ |
|
int ret = fwnode_property_read_u8_array(fwnode, name, addr, alen); |
|
|
|
if (ret == 0 && alen == ETH_ALEN && is_valid_ether_addr(addr)) |
|
return addr; |
|
return NULL; |
|
} |
|
|
|
/** |
|
* fwnode_get_mac_address - Get the MAC from the firmware node |
|
* @fwnode: Pointer to the firmware node |
|
* @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 |
|
* 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 |
|
* 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. |
|
*/ |
|
void *fwnode_get_mac_address(struct fwnode_handle *fwnode, char *addr, int alen) |
|
{ |
|
char *res; |
|
|
|
res = fwnode_get_mac_addr(fwnode, "mac-address", addr, alen); |
|
if (res) |
|
return res; |
|
|
|
res = fwnode_get_mac_addr(fwnode, "local-mac-address", addr, alen); |
|
if (res) |
|
return res; |
|
|
|
return fwnode_get_mac_addr(fwnode, "address", addr, alen); |
|
} |
|
EXPORT_SYMBOL(fwnode_get_mac_address); |
|
|
|
/** |
|
* 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 |
|
*/ |
|
void *device_get_mac_address(struct device *dev, char *addr, int alen) |
|
{ |
|
return fwnode_get_mac_address(dev_fwnode(dev), addr, alen); |
|
} |
|
EXPORT_SYMBOL(device_get_mac_address); |
|
|
|
/** |
|
* fwnode_irq_get - Get IRQ directly from a fwnode |
|
* @fwnode: Pointer to the firmware node |
|
* @index: Zero-based index of the IRQ |
|
* |
|
* Returns Linux IRQ number on success. Other values are determined |
|
* accordingly to acpi_/of_ irq_get() operation. |
|
*/ |
|
int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index) |
|
{ |
|
struct resource res; |
|
int ret; |
|
|
|
if (is_of_node(fwnode)) |
|
return of_irq_get(to_of_node(fwnode), index); |
|
|
|
ret = acpi_irq_get(ACPI_HANDLE_FWNODE(fwnode), index, &res); |
|
if (ret) |
|
return ret; |
|
|
|
return res.start; |
|
} |
|
EXPORT_SYMBOL(fwnode_irq_get); |
|
|
|
/** |
|
* fwnode_graph_get_next_endpoint - Get next endpoint firmware node |
|
* @fwnode: Pointer to the parent firmware node |
|
* @prev: Previous endpoint node or %NULL to get the first |
|
* |
|
* Returns an endpoint firmware node pointer or %NULL if no more endpoints |
|
* are available. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode, |
|
struct fwnode_handle *prev) |
|
{ |
|
const struct fwnode_handle *parent; |
|
struct fwnode_handle *ep; |
|
|
|
/* |
|
* If this function is in a loop and the previous iteration returned |
|
* an endpoint from fwnode->secondary, then we need to use the secondary |
|
* as parent rather than @fwnode. |
|
*/ |
|
if (prev) |
|
parent = fwnode_graph_get_port_parent(prev); |
|
else |
|
parent = fwnode; |
|
|
|
ep = fwnode_call_ptr_op(parent, graph_get_next_endpoint, prev); |
|
|
|
if (IS_ERR_OR_NULL(ep) && |
|
!IS_ERR_OR_NULL(parent) && !IS_ERR_OR_NULL(parent->secondary)) |
|
ep = fwnode_graph_get_next_endpoint(parent->secondary, NULL); |
|
|
|
return ep; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint); |
|
|
|
/** |
|
* fwnode_graph_get_port_parent - Return the device fwnode of a port endpoint |
|
* @endpoint: Endpoint firmware node of the port |
|
* |
|
* Return: the firmware node of the device the @endpoint belongs to. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_port_parent(const struct fwnode_handle *endpoint) |
|
{ |
|
struct fwnode_handle *port, *parent; |
|
|
|
port = fwnode_get_parent(endpoint); |
|
parent = fwnode_call_ptr_op(port, graph_get_port_parent); |
|
|
|
fwnode_handle_put(port); |
|
|
|
return parent; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_port_parent); |
|
|
|
/** |
|
* fwnode_graph_get_remote_port_parent - Return fwnode of a remote device |
|
* @fwnode: Endpoint firmware node pointing to the remote endpoint |
|
* |
|
* Extracts firmware node of a remote device the @fwnode points to. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_remote_port_parent(const struct fwnode_handle *fwnode) |
|
{ |
|
struct fwnode_handle *endpoint, *parent; |
|
|
|
endpoint = fwnode_graph_get_remote_endpoint(fwnode); |
|
parent = fwnode_graph_get_port_parent(endpoint); |
|
|
|
fwnode_handle_put(endpoint); |
|
|
|
return parent; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port_parent); |
|
|
|
/** |
|
* fwnode_graph_get_remote_port - Return fwnode of a remote port |
|
* @fwnode: Endpoint firmware node pointing to the remote endpoint |
|
* |
|
* Extracts firmware node of a remote port the @fwnode points to. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_remote_port(const struct fwnode_handle *fwnode) |
|
{ |
|
return fwnode_get_next_parent(fwnode_graph_get_remote_endpoint(fwnode)); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port); |
|
|
|
/** |
|
* fwnode_graph_get_remote_endpoint - Return fwnode of a remote endpoint |
|
* @fwnode: Endpoint firmware node pointing to the remote endpoint |
|
* |
|
* Extracts firmware node of a remote endpoint the @fwnode points to. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode) |
|
{ |
|
return fwnode_call_ptr_op(fwnode, graph_get_remote_endpoint); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint); |
|
|
|
/** |
|
* fwnode_graph_get_remote_node - get remote parent node for given port/endpoint |
|
* @fwnode: pointer to parent fwnode_handle containing graph port/endpoint |
|
* @port_id: identifier of the parent port node |
|
* @endpoint_id: identifier of the endpoint node |
|
* |
|
* Return: Remote fwnode handle associated with remote endpoint node linked |
|
* to @node. Use fwnode_node_put() on it when done. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port_id, |
|
u32 endpoint_id) |
|
{ |
|
struct fwnode_handle *endpoint = NULL; |
|
|
|
while ((endpoint = fwnode_graph_get_next_endpoint(fwnode, endpoint))) { |
|
struct fwnode_endpoint fwnode_ep; |
|
struct fwnode_handle *remote; |
|
int ret; |
|
|
|
ret = fwnode_graph_parse_endpoint(endpoint, &fwnode_ep); |
|
if (ret < 0) |
|
continue; |
|
|
|
if (fwnode_ep.port != port_id || fwnode_ep.id != endpoint_id) |
|
continue; |
|
|
|
remote = fwnode_graph_get_remote_port_parent(endpoint); |
|
if (!remote) |
|
return NULL; |
|
|
|
return fwnode_device_is_available(remote) ? remote : NULL; |
|
} |
|
|
|
return NULL; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_node); |
|
|
|
/** |
|
* fwnode_graph_get_endpoint_by_id - get endpoint by port and endpoint numbers |
|
* @fwnode: parent fwnode_handle containing the graph |
|
* @port: identifier of the port node |
|
* @endpoint: identifier of the endpoint node under the port node |
|
* @flags: fwnode lookup flags |
|
* |
|
* Return the fwnode handle of the local endpoint corresponding the port and |
|
* endpoint IDs or NULL if not found. |
|
* |
|
* If FWNODE_GRAPH_ENDPOINT_NEXT is passed in @flags and the specified endpoint |
|
* has not been found, look for the closest endpoint ID greater than the |
|
* specified one and return the endpoint that corresponds to it, if present. |
|
* |
|
* Do not return endpoints that belong to disabled devices, unless |
|
* FWNODE_GRAPH_DEVICE_DISABLED is passed in @flags. |
|
* |
|
* The returned endpoint needs to be released by calling fwnode_handle_put() on |
|
* it when it is not needed any more. |
|
*/ |
|
struct fwnode_handle * |
|
fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode, |
|
u32 port, u32 endpoint, unsigned long flags) |
|
{ |
|
struct fwnode_handle *ep = NULL, *best_ep = NULL; |
|
unsigned int best_ep_id = 0; |
|
bool endpoint_next = flags & FWNODE_GRAPH_ENDPOINT_NEXT; |
|
bool enabled_only = !(flags & FWNODE_GRAPH_DEVICE_DISABLED); |
|
|
|
while ((ep = fwnode_graph_get_next_endpoint(fwnode, ep))) { |
|
struct fwnode_endpoint fwnode_ep = { 0 }; |
|
int ret; |
|
|
|
if (enabled_only) { |
|
struct fwnode_handle *dev_node; |
|
bool available; |
|
|
|
dev_node = fwnode_graph_get_remote_port_parent(ep); |
|
available = fwnode_device_is_available(dev_node); |
|
fwnode_handle_put(dev_node); |
|
if (!available) |
|
continue; |
|
} |
|
|
|
ret = fwnode_graph_parse_endpoint(ep, &fwnode_ep); |
|
if (ret < 0) |
|
continue; |
|
|
|
if (fwnode_ep.port != port) |
|
continue; |
|
|
|
if (fwnode_ep.id == endpoint) |
|
return ep; |
|
|
|
if (!endpoint_next) |
|
continue; |
|
|
|
/* |
|
* If the endpoint that has just been found is not the first |
|
* matching one and the ID of the one found previously is closer |
|
* to the requested endpoint ID, skip it. |
|
*/ |
|
if (fwnode_ep.id < endpoint || |
|
(best_ep && best_ep_id < fwnode_ep.id)) |
|
continue; |
|
|
|
fwnode_handle_put(best_ep); |
|
best_ep = fwnode_handle_get(ep); |
|
best_ep_id = fwnode_ep.id; |
|
} |
|
|
|
return best_ep; |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_by_id); |
|
|
|
/** |
|
* fwnode_graph_parse_endpoint - parse common endpoint node properties |
|
* @fwnode: pointer to endpoint fwnode_handle |
|
* @endpoint: pointer to the fwnode endpoint data structure |
|
* |
|
* Parse @fwnode representing a graph endpoint node and store the |
|
* information in @endpoint. The caller must hold a reference to |
|
* @fwnode. |
|
*/ |
|
int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, |
|
struct fwnode_endpoint *endpoint) |
|
{ |
|
memset(endpoint, 0, sizeof(*endpoint)); |
|
|
|
return fwnode_call_int_op(fwnode, graph_parse_endpoint, endpoint); |
|
} |
|
EXPORT_SYMBOL(fwnode_graph_parse_endpoint); |
|
|
|
const void *device_get_match_data(struct device *dev) |
|
{ |
|
return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data, dev); |
|
} |
|
EXPORT_SYMBOL_GPL(device_get_match_data); |
|
|
|
static void * |
|
fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, |
|
void *data, devcon_match_fn_t match) |
|
{ |
|
struct fwnode_handle *node; |
|
struct fwnode_handle *ep; |
|
void *ret; |
|
|
|
fwnode_graph_for_each_endpoint(fwnode, ep) { |
|
node = fwnode_graph_get_remote_port_parent(ep); |
|
if (!fwnode_device_is_available(node)) |
|
continue; |
|
|
|
ret = match(node, con_id, data); |
|
fwnode_handle_put(node); |
|
if (ret) { |
|
fwnode_handle_put(ep); |
|
return ret; |
|
} |
|
} |
|
return NULL; |
|
} |
|
|
|
static void * |
|
fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, |
|
void *data, devcon_match_fn_t match) |
|
{ |
|
struct fwnode_handle *node; |
|
void *ret; |
|
int i; |
|
|
|
for (i = 0; ; i++) { |
|
node = fwnode_find_reference(fwnode, con_id, i); |
|
if (IS_ERR(node)) |
|
break; |
|
|
|
ret = match(node, NULL, data); |
|
fwnode_handle_put(node); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/** |
|
* fwnode_connection_find_match - Find connection from a device node |
|
* @fwnode: Device node with the connection |
|
* @con_id: Identifier for the connection |
|
* @data: Data for the match function |
|
* @match: Function to check and convert the connection description |
|
* |
|
* Find a connection with unique identifier @con_id between @fwnode and another |
|
* device node. @match will be used to convert the connection description to |
|
* data the caller is expecting to be returned. |
|
*/ |
|
void *fwnode_connection_find_match(struct fwnode_handle *fwnode, |
|
const char *con_id, void *data, |
|
devcon_match_fn_t match) |
|
{ |
|
void *ret; |
|
|
|
if (!fwnode || !match) |
|
return NULL; |
|
|
|
ret = fwnode_graph_devcon_match(fwnode, con_id, data, match); |
|
if (ret) |
|
return ret; |
|
|
|
return fwnode_devcon_match(fwnode, con_id, data, match); |
|
} |
|
EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
|
|
|