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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * drivers/of/property.c - Procedures for accessing and interpreting
  *             Devicetree properties and graphs.
  *
  * Initially created by copying procedures from drivers/of/base.c. This
  * file contains the OF property as well as the OF graph interface
  * functions.
  *
  * Paul Mackerras   August 1996.
  * Copyright (C) 1996-2005 Paul Mackerras.
  *
  *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
  *    {engebret|bergner}@us.ibm.com
  *
  *  Adapted for sparc and sparc64 by David S. Miller davem@davemloft.net
  *
  *  Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and
  *  Grant Likely.
  */
 
 #define pr_fmt(fmt) "OF: " fmt
 
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/of_irq.h>
 #include <linux/string.h>
 #include <linux/moduleparam.h>
 
 #include "of_private.h"
 
 /**
  * of_graph_is_present() - check graph's presence
  * @node: pointer to device_node containing graph port
  *
  * Return: True if @node has a port or ports (with a port) sub-node,
  * false otherwise.
  */
 bool of_graph_is_present(const struct device_node *node)
 {
     struct device_node *ports, *port;
 
     ports = of_get_child_by_name(node, "ports");
     if (ports)
         node = ports;
 
     port = of_get_child_by_name(node, "port");
     of_node_put(ports);
     of_node_put(port);
 
     return !!port;
 }
 EXPORT_SYMBOL(of_graph_is_present);
 
 /**
  * of_property_count_elems_of_size - Count the number of elements in a property
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @elem_size:  size of the individual element
  *
  * Search for a property in a device node and count the number of elements of
  * size elem_size in it.
  *
  * Return: The number of elements on sucess, -EINVAL if the property does not
  * exist or its length does not match a multiple of elem_size and -ENODATA if
  * the property does not have a value.
  */
 int of_property_count_elems_of_size(const struct device_node *np,
                 const char *propname, int elem_size)
 {
     struct property *prop = of_find_property(np, propname, NULL);
 
     if (!prop)
         return -EINVAL;
     if (!prop->value)
         return -ENODATA;
 
     if (prop->length % elem_size != 0) {
         pr_err("size of %s in node %pOF is not a multiple of %d\n",
                propname, np, elem_size);
         return -EINVAL;
     }
 
     return prop->length / elem_size;
 }
 EXPORT_SYMBOL_GPL(of_property_count_elems_of_size);
 
 /**
  * of_find_property_value_of_size
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @min:    minimum allowed length of property value
  * @max:    maximum allowed length of property value (0 means unlimited)
  * @len:    if !=NULL, actual length is written to here
  *
  * Search for a property in a device node and valid the requested size.
  *
  * Return: The property value on success, -EINVAL if the property does not
  * exist, -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data is too small or too large.
  *
  */
 static void *of_find_property_value_of_size(const struct device_node *np,
             const char *propname, u32 min, u32 max, size_t *len)
 {
     struct property *prop = of_find_property(np, propname, NULL);
 
     if (!prop)
         return ERR_PTR(-EINVAL);
     if (!prop->value)
         return ERR_PTR(-ENODATA);
     if (prop->length < min)
         return ERR_PTR(-EOVERFLOW);
     if (max && prop->length > max)
         return ERR_PTR(-EOVERFLOW);
 
     if (len)
         *len = prop->length;
 
     return prop->value;
 }
 
 /**
  * of_property_read_u32_index - Find and read a u32 from a multi-value property.
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @index:  index of the u32 in the list of values
  * @out_value:  pointer to return value, modified only if no error.
  *
  * Search for a property in a device node and read nth 32-bit value from
  * it.
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_value is modified only if a valid u32 value can be decoded.
  */
 int of_property_read_u32_index(const struct device_node *np,
                        const char *propname,
                        u32 index, u32 *out_value)
 {
     const u32 *val = of_find_property_value_of_size(np, propname,
                     ((index + 1) * sizeof(*out_value)),
                     0,
                     NULL);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     *out_value = be32_to_cpup(((__be32 *)val) + index);
     return 0;
 }
 EXPORT_SYMBOL_GPL(of_property_read_u32_index);
 
 /**
  * of_property_read_u64_index - Find and read a u64 from a multi-value property.
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @index:  index of the u64 in the list of values
  * @out_value:  pointer to return value, modified only if no error.
  *
  * Search for a property in a device node and read nth 64-bit value from
  * it.
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_value is modified only if a valid u64 value can be decoded.
  */
 int of_property_read_u64_index(const struct device_node *np,
                        const char *propname,
                        u32 index, u64 *out_value)
 {
     const u64 *val = of_find_property_value_of_size(np, propname,
                     ((index + 1) * sizeof(*out_value)),
                     0, NULL);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     *out_value = be64_to_cpup(((__be64 *)val) + index);
     return 0;
 }
 EXPORT_SYMBOL_GPL(of_property_read_u64_index);
 
 /**
  * of_property_read_variable_u8_array - Find and read an array of u8 from a
  * property, with bounds on the minimum and maximum array size.
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to found values.
  * @sz_min: minimum number of array elements to read
  * @sz_max: maximum number of array elements to read, if zero there is no
  *      upper limit on the number of elements in the dts entry but only
  *      sz_min will be read.
  *
  * Search for a property in a device node and read 8-bit value(s) from
  * it.
  *
  * dts entry of array should be like:
  *  ``property = /bits/ 8 <0x50 0x60 0x70>;``
  *
  * Return: The number of elements read on success, -EINVAL if the property
  * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
  * if the property data is smaller than sz_min or longer than sz_max.
  *
  * The out_values is modified only if a valid u8 value can be decoded.
  */
 int of_property_read_variable_u8_array(const struct device_node *np,
                     const char *propname, u8 *out_values,
                     size_t sz_min, size_t sz_max)
 {
     size_t sz, count;
     const u8 *val = of_find_property_value_of_size(np, propname,
                         (sz_min * sizeof(*out_values)),
                         (sz_max * sizeof(*out_values)),
                         &sz);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     if (!sz_max)
         sz = sz_min;
     else
         sz /= sizeof(*out_values);
 
     count = sz;
     while (count--)
         *out_values++ = *val++;
 
     return sz;
 }
 EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array);
 
 /**
  * of_property_read_variable_u16_array - Find and read an array of u16 from a
  * property, with bounds on the minimum and maximum array size.
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to found values.
  * @sz_min: minimum number of array elements to read
  * @sz_max: maximum number of array elements to read, if zero there is no
  *      upper limit on the number of elements in the dts entry but only
  *      sz_min will be read.
  *
  * Search for a property in a device node and read 16-bit value(s) from
  * it.
  *
  * dts entry of array should be like:
  *  ``property = /bits/ 16 <0x5000 0x6000 0x7000>;``
  *
  * Return: The number of elements read on success, -EINVAL if the property
  * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
  * if the property data is smaller than sz_min or longer than sz_max.
  *
  * The out_values is modified only if a valid u16 value can be decoded.
  */
 int of_property_read_variable_u16_array(const struct device_node *np,
                     const char *propname, u16 *out_values,
                     size_t sz_min, size_t sz_max)
 {
     size_t sz, count;
     const __be16 *val = of_find_property_value_of_size(np, propname,
                         (sz_min * sizeof(*out_values)),
                         (sz_max * sizeof(*out_values)),
                         &sz);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     if (!sz_max)
         sz = sz_min;
     else
         sz /= sizeof(*out_values);
 
     count = sz;
     while (count--)
         *out_values++ = be16_to_cpup(val++);
 
     return sz;
 }
 EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array);
 
 /**
  * of_property_read_variable_u32_array - Find and read an array of 32 bit
  * integers from a property, with bounds on the minimum and maximum array size.
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to return found values.
  * @sz_min: minimum number of array elements to read
  * @sz_max: maximum number of array elements to read, if zero there is no
  *      upper limit on the number of elements in the dts entry but only
  *      sz_min will be read.
  *
  * Search for a property in a device node and read 32-bit value(s) from
  * it.
  *
  * Return: The number of elements read on success, -EINVAL if the property
  * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
  * if the property data is smaller than sz_min or longer than sz_max.
  *
  * The out_values is modified only if a valid u32 value can be decoded.
  */
 int of_property_read_variable_u32_array(const struct device_node *np,
                    const char *propname, u32 *out_values,
                    size_t sz_min, size_t sz_max)
 {
     size_t sz, count;
     const __be32 *val = of_find_property_value_of_size(np, propname,
                         (sz_min * sizeof(*out_values)),
                         (sz_max * sizeof(*out_values)),
                         &sz);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     if (!sz_max)
         sz = sz_min;
     else
         sz /= sizeof(*out_values);
 
     count = sz;
     while (count--)
         *out_values++ = be32_to_cpup(val++);
 
     return sz;
 }
 EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array);
 
 /**
  * of_property_read_u64 - Find and read a 64 bit integer from a property
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_value:  pointer to return value, modified only if return value is 0.
  *
  * Search for a property in a device node and read a 64-bit value from
  * it.
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_value is modified only if a valid u64 value can be decoded.
  */
 int of_property_read_u64(const struct device_node *np, const char *propname,
              u64 *out_value)
 {
     const __be32 *val = of_find_property_value_of_size(np, propname,
                         sizeof(*out_value),
                         0,
                         NULL);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     *out_value = of_read_number(val, 2);
     return 0;
 }
 EXPORT_SYMBOL_GPL(of_property_read_u64);
 
 /**
  * of_property_read_variable_u64_array - Find and read an array of 64 bit
  * integers from a property, with bounds on the minimum and maximum array size.
  *
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to found values.
  * @sz_min: minimum number of array elements to read
  * @sz_max: maximum number of array elements to read, if zero there is no
  *      upper limit on the number of elements in the dts entry but only
  *      sz_min will be read.
  *
  * Search for a property in a device node and read 64-bit value(s) from
  * it.
  *
  * Return: The number of elements read on success, -EINVAL if the property
  * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
  * if the property data is smaller than sz_min or longer than sz_max.
  *
  * The out_values is modified only if a valid u64 value can be decoded.
  */
 int of_property_read_variable_u64_array(const struct device_node *np,
                    const char *propname, u64 *out_values,
                    size_t sz_min, size_t sz_max)
 {
     size_t sz, count;
     const __be32 *val = of_find_property_value_of_size(np, propname,
                         (sz_min * sizeof(*out_values)),
                         (sz_max * sizeof(*out_values)),
                         &sz);
 
     if (IS_ERR(val))
         return PTR_ERR(val);
 
     if (!sz_max)
         sz = sz_min;
     else
         sz /= sizeof(*out_values);
 
     count = sz;
     while (count--) {
         *out_values++ = of_read_number(val, 2);
         val += 2;
     }
 
     return sz;
 }
 EXPORT_SYMBOL_GPL(of_property_read_variable_u64_array);
 
 /**
  * of_property_read_string - Find and read a string from a property
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_string: pointer to null terminated return string, modified only if
  *      return value is 0.
  *
  * Search for a property in a device tree node and retrieve a null
  * terminated string value (pointer to data, not a copy).
  *
  * Return: 0 on success, -EINVAL if the property does not exist, -ENODATA if
  * property does not have a value, and -EILSEQ if the string is not
  * null-terminated within the length of the property data.
  *
  * Note that the empty string "" has length of 1, thus -ENODATA cannot
  * be interpreted as an empty string.
  *
  * The out_string pointer is modified only if a valid string can be decoded.
  */
 int of_property_read_string(const struct device_node *np, const char *propname,
                 const char **out_string)
 {
     const struct property *prop = of_find_property(np, propname, NULL);
     if (!prop)
         return -EINVAL;
     if (!prop->length)
         return -ENODATA;
     if (strnlen(prop->value, prop->length) >= prop->length)
         return -EILSEQ;
     *out_string = prop->value;
     return 0;
 }
 EXPORT_SYMBOL_GPL(of_property_read_string);
 
 /**
  * of_property_match_string() - Find string in a list and return index
  * @np: pointer to node containing string list property
  * @propname: string list property name
  * @string: pointer to string to search for in string list
  *
  * This function searches a string list property and returns the index
  * of a specific string value.
  */
 int of_property_match_string(const struct device_node *np, const char *propname,
                  const char *string)
 {
     const struct property *prop = of_find_property(np, propname, NULL);
     size_t l;
     int i;
     const char *p, *end;
 
     if (!prop)
         return -EINVAL;
     if (!prop->value)
         return -ENODATA;
 
     p = prop->value;
     end = p + prop->length;
 
     for (i = 0; p < end; i++, p += l) {
         l = strnlen(p, end - p) + 1;
         if (p + l > end)
             return -EILSEQ;
         pr_debug("comparing %s with %s\n", string, p);
         if (strcmp(string, p) == 0)
             return i; /* Found it; return index */
     }
     return -ENODATA;
 }
 EXPORT_SYMBOL_GPL(of_property_match_string);
 
 /**
  * of_property_read_string_helper() - Utility helper for parsing string properties
  * @np:     device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_strs:   output array of string pointers.
  * @sz:     number of array elements to read.
  * @skip:   Number of strings to skip over at beginning of list.
  *
  * Don't call this function directly. It is a utility helper for the
  * of_property_read_string*() family of functions.
  */
 int of_property_read_string_helper(const struct device_node *np,
                    const char *propname, const char **out_strs,
                    size_t sz, int skip)
 {
     const struct property *prop = of_find_property(np, propname, NULL);
     int l = 0, i = 0;
     const char *p, *end;
 
     if (!prop)
         return -EINVAL;
     if (!prop->value)
         return -ENODATA;
     p = prop->value;
     end = p + prop->length;
 
     for (i = 0; p < end && (!out_strs || i < skip + sz); i++, p += l) {
         l = strnlen(p, end - p) + 1;
         if (p + l > end)
             return -EILSEQ;
         if (out_strs && i >= skip)
             *out_strs++ = p;
     }
     i -= skip;
     return i <= 0 ? -ENODATA : i;
 }
 EXPORT_SYMBOL_GPL(of_property_read_string_helper);
 
 const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
                    u32 *pu)
 {
     const void *curv = cur;
 
     if (!prop)
         return NULL;
 
     if (!cur) {
         curv = prop->value;
         goto out_val;
     }
 
     curv += sizeof(*cur);
     if (curv >= prop->value + prop->length)
         return NULL;
 
 out_val:
     *pu = be32_to_cpup(curv);
     return curv;
 }
 EXPORT_SYMBOL_GPL(of_prop_next_u32);
 
 const char *of_prop_next_string(struct property *prop, const char *cur)
 {
     const void *curv = cur;
 
     if (!prop)
         return NULL;
 
     if (!cur)
         return prop->value;
 
     curv += strlen(cur) + 1;
     if (curv >= prop->value + prop->length)
         return NULL;
 
     return curv;
 }
 EXPORT_SYMBOL_GPL(of_prop_next_string);
 
 /**
  * of_graph_parse_endpoint() - parse common endpoint node properties
  * @node: pointer to endpoint device_node
  * @endpoint: pointer to the OF endpoint data structure
  *
  * The caller should hold a reference to @node.
  */
 int of_graph_parse_endpoint(const struct device_node *node,
                 struct of_endpoint *endpoint)
 {
     struct device_node *port_node = of_get_parent(node);
 
     WARN_ONCE(!port_node, "%s(): endpoint %pOF has no parent node\n",
           __func__, node);
 
     memset(endpoint, 0, sizeof(*endpoint));
 
     endpoint->local_node = node;
     /*
      * It doesn't matter whether the two calls below succeed.
      * If they don't then the default value 0 is used.
      */
     of_property_read_u32(port_node, "reg", &endpoint->port);
     of_property_read_u32(node, "reg", &endpoint->id);
 
     of_node_put(port_node);
 
     return 0;
 }
 EXPORT_SYMBOL(of_graph_parse_endpoint);
 
 /**
  * of_graph_get_port_by_id() - get the port matching a given id
  * @parent: pointer to the parent device node
  * @id: id of the port
  *
  * Return: A 'port' node pointer with refcount incremented. The caller
  * has to use of_node_put() on it when done.
  */
 struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id)
 {
     struct device_node *node, *port;
 
     node = of_get_child_by_name(parent, "ports");
     if (node)
         parent = node;
 
     for_each_child_of_node(parent, port) {
         u32 port_id = 0;
 
         if (!of_node_name_eq(port, "port"))
             continue;
         of_property_read_u32(port, "reg", &port_id);
         if (id == port_id)
             break;
     }
 
     of_node_put(node);
 
     return port;
 }
 EXPORT_SYMBOL(of_graph_get_port_by_id);
 
 /**
  * of_graph_get_next_endpoint() - get next endpoint node
  * @parent: pointer to the parent device node
  * @prev: previous endpoint node, or NULL to get first
  *
  * Return: An 'endpoint' node pointer with refcount incremented. Refcount
  * of the passed @prev node is decremented.
  */
 struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
                     struct device_node *prev)
 {
     struct device_node *endpoint;
     struct device_node *port;
 
     if (!parent)
         return NULL;
 
     /*
      * Start by locating the port node. If no previous endpoint is specified
      * search for the first port node, otherwise get the previous endpoint
      * parent port node.
      */
     if (!prev) {
         struct device_node *node;
 
         node = of_get_child_by_name(parent, "ports");
         if (node)
             parent = node;
 
         port = of_get_child_by_name(parent, "port");
         of_node_put(node);
 
         if (!port) {
             pr_err("graph: no port node found in %pOF\n", parent);
             return NULL;
         }
     } else {
         port = of_get_parent(prev);
         if (WARN_ONCE(!port, "%s(): endpoint %pOF has no parent node\n",
                   __func__, prev))
             return NULL;
     }
 
     while (1) {
         /*
          * Now that we have a port node, get the next endpoint by
          * getting the next child. If the previous endpoint is NULL this
          * will return the first child.
          */
         endpoint = of_get_next_child(port, prev);
         if (endpoint) {
             of_node_put(port);
             return endpoint;
         }
 
         /* No more endpoints under this port, try the next one. */
         prev = NULL;
 
         do {
             port = of_get_next_child(parent, port);
             if (!port)
                 return NULL;
         } while (!of_node_name_eq(port, "port"));
     }
 }
 EXPORT_SYMBOL(of_graph_get_next_endpoint);
 
 /**
  * of_graph_get_endpoint_by_regs() - get endpoint node of specific identifiers
  * @parent: pointer to the parent device node
  * @port_reg: identifier (value of reg property) of the parent port node
  * @reg: identifier (value of reg property) of the endpoint node
  *
  * Return: An 'endpoint' node pointer which is identified by reg and at the same
  * is the child of a port node identified by port_reg. reg and port_reg are
  * ignored when they are -1. Use of_node_put() on the pointer when done.
  */
 struct device_node *of_graph_get_endpoint_by_regs(
     const struct device_node *parent, int port_reg, int reg)
 {
     struct of_endpoint endpoint;
     struct device_node *node = NULL;
 
     for_each_endpoint_of_node(parent, node) {
         of_graph_parse_endpoint(node, &endpoint);
         if (((port_reg == -1) || (endpoint.port == port_reg)) &&
             ((reg == -1) || (endpoint.id == reg)))
             return node;
     }
 
     return NULL;
 }
 EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
 
 /**
  * of_graph_get_remote_endpoint() - get remote endpoint node
  * @node: pointer to a local endpoint device_node
  *
  * Return: Remote endpoint node associated with remote endpoint node linked
  *     to @node. Use of_node_put() on it when done.
  */
 struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
 {
     /* Get remote endpoint node. */
     return of_parse_phandle(node, "remote-endpoint", 0);
 }
 EXPORT_SYMBOL(of_graph_get_remote_endpoint);
 
 /**
  * of_graph_get_port_parent() - get port's parent node
  * @node: pointer to a local endpoint device_node
  *
  * Return: device node associated with endpoint node linked
  *     to @node. Use of_node_put() on it when done.
  */
 struct device_node *of_graph_get_port_parent(struct device_node *node)
 {
     unsigned int depth;
 
     if (!node)
         return NULL;
 
     /*
      * Preserve usecount for passed in node as of_get_next_parent()
      * will do of_node_put() on it.
      */
     of_node_get(node);
 
     /* Walk 3 levels up only if there is 'ports' node. */
     for (depth = 3; depth && node; depth--) {
         node = of_get_next_parent(node);
         if (depth == 2 && !of_node_name_eq(node, "ports"))
             break;
     }
     return node;
 }
 EXPORT_SYMBOL(of_graph_get_port_parent);
 
 /**
  * of_graph_get_remote_port_parent() - get remote port's parent node
  * @node: pointer to a local endpoint device_node
  *
  * Return: Remote device node associated with remote endpoint node linked
  *     to @node. Use of_node_put() on it when done.
  */
 struct device_node *of_graph_get_remote_port_parent(
                    const struct device_node *node)
 {
     struct device_node *np, *pp;
 
     /* Get remote endpoint node. */
     np = of_graph_get_remote_endpoint(node);
 
     pp = of_graph_get_port_parent(np);
 
     of_node_put(np);
 
     return pp;
 }
 EXPORT_SYMBOL(of_graph_get_remote_port_parent);
 
 /**
  * of_graph_get_remote_port() - get remote port node
  * @node: pointer to a local endpoint device_node
  *
  * Return: Remote port node associated with remote endpoint node linked
  * to @node. Use of_node_put() on it when done.
  */
 struct device_node *of_graph_get_remote_port(const struct device_node *node)
 {
     struct device_node *np;
 
     /* Get remote endpoint node. */
     np = of_graph_get_remote_endpoint(node);
     if (!np)
         return NULL;
     return of_get_next_parent(np);
 }
 EXPORT_SYMBOL(of_graph_get_remote_port);
 
 int of_graph_get_endpoint_count(const struct device_node *np)
 {
     struct device_node *endpoint;
     int num = 0;
 
     for_each_endpoint_of_node(np, endpoint)
         num++;
 
     return num;
 }
 EXPORT_SYMBOL(of_graph_get_endpoint_count);
 
 /**
  * of_graph_get_remote_node() - get remote parent device_node for given port/endpoint
  * @node: pointer to parent device_node containing graph port/endpoint
  * @port: identifier (value of reg property) of the parent port node
  * @endpoint: identifier (value of reg property) of the endpoint node
  *
  * Return: Remote device node associated with remote endpoint node linked
  * to @node. Use of_node_put() on it when done.
  */
 struct device_node *of_graph_get_remote_node(const struct device_node *node,
                          u32 port, u32 endpoint)
 {
     struct device_node *endpoint_node, *remote;
 
     endpoint_node = of_graph_get_endpoint_by_regs(node, port, endpoint);
     if (!endpoint_node) {
         pr_debug("no valid endpoint (%d, %d) for node %pOF\n",
              port, endpoint, node);
         return NULL;
     }
 
     remote = of_graph_get_remote_port_parent(endpoint_node);
     of_node_put(endpoint_node);
     if (!remote) {
         pr_debug("no valid remote node\n");
         return NULL;
     }
 
     if (!of_device_is_available(remote)) {
         pr_debug("not available for remote node\n");
         of_node_put(remote);
         return NULL;
     }
 
     return remote;
 }
 EXPORT_SYMBOL(of_graph_get_remote_node);
 
 static struct fwnode_handle *of_fwnode_get(struct fwnode_handle *fwnode)
 {
     return of_fwnode_handle(of_node_get(to_of_node(fwnode)));
 }
 
 static void of_fwnode_put(struct fwnode_handle *fwnode)
 {
     of_node_put(to_of_node(fwnode));
 }
 
 static bool of_fwnode_device_is_available(const struct fwnode_handle *fwnode)
 {
     return of_device_is_available(to_of_node(fwnode));
 }
 
 static bool of_fwnode_device_dma_supported(const struct fwnode_handle *fwnode)
 {
     return true;
 }
 
 static enum dev_dma_attr
 of_fwnode_device_get_dma_attr(const struct fwnode_handle *fwnode)
 {
     if (of_dma_is_coherent(to_of_node(fwnode)))
         return DEV_DMA_COHERENT;
     else
         return DEV_DMA_NON_COHERENT;
 }
 
 static bool of_fwnode_property_present(const struct fwnode_handle *fwnode,
                        const char *propname)
 {
     return of_property_read_bool(to_of_node(fwnode), propname);
 }
 
 static int of_fwnode_property_read_int_array(const struct fwnode_handle *fwnode,
                          const char *propname,
                          unsigned int elem_size, void *val,
                          size_t nval)
 {
     const struct device_node *node = to_of_node(fwnode);
 
     if (!val)
         return of_property_count_elems_of_size(node, propname,
                                elem_size);
 
     switch (elem_size) {
     case sizeof(u8):
         return of_property_read_u8_array(node, propname, val, nval);
     case sizeof(u16):
         return of_property_read_u16_array(node, propname, val, nval);
     case sizeof(u32):
         return of_property_read_u32_array(node, propname, val, nval);
     case sizeof(u64):
         return of_property_read_u64_array(node, propname, val, nval);
     }
 
     return -ENXIO;
 }
 
 static int
 of_fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
                      const char *propname, const char **val,
                      size_t nval)
 {
     const struct device_node *node = to_of_node(fwnode);
 
     return val ?
         of_property_read_string_array(node, propname, val, nval) :
         of_property_count_strings(node, propname);
 }
 
 static const char *of_fwnode_get_name(const struct fwnode_handle *fwnode)
 {
     return kbasename(to_of_node(fwnode)->full_name);
 }
 
 static const char *of_fwnode_get_name_prefix(const struct fwnode_handle *fwnode)
 {
     /* Root needs no prefix here (its name is "/"). */
     if (!to_of_node(fwnode)->parent)
         return "";
 
     return "/";
 }
 
 static struct fwnode_handle *
 of_fwnode_get_parent(const struct fwnode_handle *fwnode)
 {
     return of_fwnode_handle(of_get_parent(to_of_node(fwnode)));
 }
 
 static struct fwnode_handle *
 of_fwnode_get_next_child_node(const struct fwnode_handle *fwnode,
                   struct fwnode_handle *child)
 {
     return of_fwnode_handle(of_get_next_available_child(to_of_node(fwnode),
                                 to_of_node(child)));
 }
 
 static struct fwnode_handle *
 of_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
                    const char *childname)
 {
     const struct device_node *node = to_of_node(fwnode);
     struct device_node *child;
 
     for_each_available_child_of_node(node, child)
         if (of_node_name_eq(child, childname))
             return of_fwnode_handle(child);
 
     return NULL;
 }
 
 static int
 of_fwnode_get_reference_args(const struct fwnode_handle *fwnode,
                  const char *prop, const char *nargs_prop,
                  unsigned int nargs, unsigned int index,
                  struct fwnode_reference_args *args)
 {
     struct of_phandle_args of_args;
     unsigned int i;
     int ret;
 
     if (nargs_prop)
         ret = of_parse_phandle_with_args(to_of_node(fwnode), prop,
                          nargs_prop, index, &of_args);
     else
         ret = of_parse_phandle_with_fixed_args(to_of_node(fwnode), prop,
                                nargs, index, &of_args);
     if (ret < 0)
         return ret;
     if (!args)
         return 0;
 
     args->nargs = of_args.args_count;
     args->fwnode = of_fwnode_handle(of_args.np);
 
     for (i = 0; i < NR_FWNODE_REFERENCE_ARGS; i++)
         args->args[i] = i < of_args.args_count ? of_args.args[i] : 0;
 
     return 0;
 }
 
 static struct fwnode_handle *
 of_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode,
                   struct fwnode_handle *prev)
 {
     return of_fwnode_handle(of_graph_get_next_endpoint(to_of_node(fwnode),
                                to_of_node(prev)));
 }
 
 static struct fwnode_handle *
 of_fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode)
 {
     return of_fwnode_handle(
         of_graph_get_remote_endpoint(to_of_node(fwnode)));
 }
 
 static struct fwnode_handle *
 of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode)
 {
     struct device_node *np;
 
     /* Get the parent of the port */
     np = of_get_parent(to_of_node(fwnode));
     if (!np)
         return NULL;
 
     /* Is this the "ports" node? If not, it's the port parent. */
     if (!of_node_name_eq(np, "ports"))
         return of_fwnode_handle(np);
 
     return of_fwnode_handle(of_get_next_parent(np));
 }
 
 static int of_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
                       struct fwnode_endpoint *endpoint)
 {
     const struct device_node *node = to_of_node(fwnode);
     struct device_node *port_node = of_get_parent(node);
 
     endpoint->local_fwnode = fwnode;
 
     of_property_read_u32(port_node, "reg", &endpoint->port);
     of_property_read_u32(node, "reg", &endpoint->id);
 
     of_node_put(port_node);
 
     return 0;
 }
 
 static const void *
 of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
                 const struct device *dev)
 {
     return of_device_get_match_data(dev);
 }
 
 static bool of_is_ancestor_of(struct device_node *test_ancestor,
                   struct device_node *child)
 {
     of_node_get(child);
     while (child) {
         if (child == test_ancestor) {
             of_node_put(child);
             return true;
         }
         child = of_get_next_parent(child);
     }
     return false;
 }
 
 static struct device_node *of_get_compat_node(struct device_node *np)
 {
     of_node_get(np);
 
     while (np) {
         if (!of_device_is_available(np)) {
             of_node_put(np);
             np = NULL;
         }
 
         if (of_find_property(np, "compatible", NULL))
             break;
 
         np = of_get_next_parent(np);
     }
 
     return np;
 }
 
 static struct device_node *of_get_compat_node_parent(struct device_node *np)
 {
     struct device_node *parent, *node;
 
     parent = of_get_parent(np);
     node = of_get_compat_node(parent);
     of_node_put(parent);
 
     return node;
 }
 
 /**
  * of_link_to_phandle - Add fwnode link to supplier from supplier phandle
  * @con_np: consumer device tree node
  * @sup_np: supplier device tree node
  *
  * Given a phandle to a supplier device tree node (@sup_np), this function
  * finds the device that owns the supplier device tree node and creates a
  * device link from @dev consumer device to the supplier device. This function
  * doesn't create device links for invalid scenarios such as trying to create a
  * link with a parent device as the consumer of its child device. In such
  * cases, it returns an error.
  *
  * Returns:
  * - 0 if fwnode link successfully created to supplier
  * - -EINVAL if the supplier link is invalid and should not be created
  * - -ENODEV if struct device will never be create for supplier
  */
 static int of_link_to_phandle(struct device_node *con_np,
                   struct device_node *sup_np)
 {
     struct device *sup_dev;
     struct device_node *tmp_np = sup_np;
 
     /*
      * Find the device node that contains the supplier phandle.  It may be
      * @sup_np or it may be an ancestor of @sup_np.
      */
     sup_np = of_get_compat_node(sup_np);
     if (!sup_np) {
         pr_debug("Not linking %pOFP to %pOFP - No device\n",
              con_np, tmp_np);
         return -ENODEV;
     }
 
     /*
      * Don't allow linking a device node as a consumer of one of its
      * descendant nodes. By definition, a child node can't be a functional
      * dependency for the parent node.
      */
     if (of_is_ancestor_of(con_np, sup_np)) {
         pr_debug("Not linking %pOFP to %pOFP - is descendant\n",
              con_np, sup_np);
         of_node_put(sup_np);
         return -EINVAL;
     }
 
     /*
      * Don't create links to "early devices" that won't have struct devices
      * created for them.
      */
     sup_dev = get_dev_from_fwnode(&sup_np->fwnode);
     if (!sup_dev &&
         (of_node_check_flag(sup_np, OF_POPULATED) ||
          sup_np->fwnode.flags & FWNODE_FLAG_NOT_DEVICE)) {
         pr_debug("Not linking %pOFP to %pOFP - No struct device\n",
              con_np, sup_np);
         of_node_put(sup_np);
         return -ENODEV;
     }
     put_device(sup_dev);
 
     fwnode_link_add(of_fwnode_handle(con_np), of_fwnode_handle(sup_np));
     of_node_put(sup_np);
 
     return 0;
 }
 
 /**
  * parse_prop_cells - Property parsing function for suppliers
  *
  * @np:     Pointer to device tree node containing a list
  * @prop_name:  Name of property to be parsed. Expected to hold phandle values
  * @index:  For properties holding a list of phandles, this is the index
  *      into the list.
  * @list_name:  Property name that is known to contain list of phandle(s) to
  *      supplier(s)
  * @cells_name: property name that specifies phandles' arguments count
  *
  * This is a helper function to parse properties that have a known fixed name
  * and are a list of phandles and phandle arguments.
  *
  * Returns:
  * - phandle node pointer with refcount incremented. Caller must of_node_put()
  *   on it when done.
  * - NULL if no phandle found at index
  */
 static struct device_node *parse_prop_cells(struct device_node *np,
                         const char *prop_name, int index,
                         const char *list_name,
                         const char *cells_name)
 {
     struct of_phandle_args sup_args;
 
     if (strcmp(prop_name, list_name))
         return NULL;
 
     if (of_parse_phandle_with_args(np, list_name, cells_name, index,
                        &sup_args))
         return NULL;
 
     return sup_args.np;
 }
 
 #define DEFINE_SIMPLE_PROP(fname, name, cells)                \
 static struct device_node *parse_##fname(struct device_node *np,      \
                     const char *prop_name, int index) \
 {                                     \
     return parse_prop_cells(np, prop_name, index, name, cells);   \
 }
 
 static int strcmp_suffix(const char *str, const char *suffix)
 {
     unsigned int len, suffix_len;
 
     len = strlen(str);
     suffix_len = strlen(suffix);
     if (len <= suffix_len)
         return -1;
     return strcmp(str + len - suffix_len, suffix);
 }
 
 /**
  * parse_suffix_prop_cells - Suffix property parsing function for suppliers
  *
  * @np:     Pointer to device tree node containing a list
  * @prop_name:  Name of property to be parsed. Expected to hold phandle values
  * @index:  For properties holding a list of phandles, this is the index
  *      into the list.
  * @suffix: Property suffix that is known to contain list of phandle(s) to
  *      supplier(s)
  * @cells_name: property name that specifies phandles' arguments count
  *
  * This is a helper function to parse properties that have a known fixed suffix
  * and are a list of phandles and phandle arguments.
  *
  * Returns:
  * - phandle node pointer with refcount incremented. Caller must of_node_put()
  *   on it when done.
  * - NULL if no phandle found at index
  */
 static struct device_node *parse_suffix_prop_cells(struct device_node *np,
                         const char *prop_name, int index,
                         const char *suffix,
                         const char *cells_name)
 {
     struct of_phandle_args sup_args;
 
     if (strcmp_suffix(prop_name, suffix))
         return NULL;
 
     if (of_parse_phandle_with_args(np, prop_name, cells_name, index,
                        &sup_args))
         return NULL;
 
     return sup_args.np;
 }
 
 #define DEFINE_SUFFIX_PROP(fname, suffix, cells)                 \
 static struct device_node *parse_##fname(struct device_node *np,         \
                     const char *prop_name, int index)    \
 {                                        \
     return parse_suffix_prop_cells(np, prop_name, index, suffix, cells); \
 }
 
 /**
  * struct supplier_bindings - Property parsing functions for suppliers
  *
  * @parse_prop: function name
  *  parse_prop() finds the node corresponding to a supplier phandle
  * @parse_prop.np: Pointer to device node holding supplier phandle property
  * @parse_prop.prop_name: Name of property holding a phandle value
  * @parse_prop.index: For properties holding a list of phandles, this is the
  *            index into the list
  * @optional: Describes whether a supplier is mandatory or not
  * @node_not_dev: The consumer node containing the property is never converted
  *        to a struct device. Instead, parse ancestor nodes for the
  *        compatible property to find a node corresponding to a device.
  *
  * Returns:
  * parse_prop() return values are
  * - phandle node pointer with refcount incremented. Caller must of_node_put()
  *   on it when done.
  * - NULL if no phandle found at index
  */
 struct supplier_bindings {
     struct device_node *(*parse_prop)(struct device_node *np,
                       const char *prop_name, int index);
     bool optional;
     bool node_not_dev;
 };
 
 DEFINE_SIMPLE_PROP(clocks, "clocks", "#clock-cells")
 DEFINE_SIMPLE_PROP(interconnects, "interconnects", "#interconnect-cells")
 DEFINE_SIMPLE_PROP(iommus, "iommus", "#iommu-cells")
 DEFINE_SIMPLE_PROP(mboxes, "mboxes", "#mbox-cells")
 DEFINE_SIMPLE_PROP(io_channels, "io-channel", "#io-channel-cells")
 DEFINE_SIMPLE_PROP(interrupt_parent, "interrupt-parent", NULL)
 DEFINE_SIMPLE_PROP(dmas, "dmas", "#dma-cells")
 DEFINE_SIMPLE_PROP(power_domains, "power-domains", "#power-domain-cells")
 DEFINE_SIMPLE_PROP(hwlocks, "hwlocks", "#hwlock-cells")
 DEFINE_SIMPLE_PROP(extcon, "extcon", NULL)
 DEFINE_SIMPLE_PROP(nvmem_cells, "nvmem-cells", NULL)
 DEFINE_SIMPLE_PROP(phys, "phys", "#phy-cells")
 DEFINE_SIMPLE_PROP(wakeup_parent, "wakeup-parent", NULL)
 DEFINE_SIMPLE_PROP(pinctrl0, "pinctrl-0", NULL)
 DEFINE_SIMPLE_PROP(pinctrl1, "pinctrl-1", NULL)
 DEFINE_SIMPLE_PROP(pinctrl2, "pinctrl-2", NULL)
 DEFINE_SIMPLE_PROP(pinctrl3, "pinctrl-3", NULL)
 DEFINE_SIMPLE_PROP(pinctrl4, "pinctrl-4", NULL)
 DEFINE_SIMPLE_PROP(pinctrl5, "pinctrl-5", NULL)
 DEFINE_SIMPLE_PROP(pinctrl6, "pinctrl-6", NULL)
 DEFINE_SIMPLE_PROP(pinctrl7, "pinctrl-7", NULL)
 DEFINE_SIMPLE_PROP(pinctrl8, "pinctrl-8", NULL)
 DEFINE_SIMPLE_PROP(remote_endpoint, "remote-endpoint", NULL)
 DEFINE_SIMPLE_PROP(pwms, "pwms", "#pwm-cells")
 DEFINE_SIMPLE_PROP(resets, "resets", "#reset-cells")
 DEFINE_SIMPLE_PROP(leds, "leds", NULL)
 DEFINE_SIMPLE_PROP(backlight, "backlight", NULL)
 DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
 DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
 
 static struct device_node *parse_gpios(struct device_node *np,
                        const char *prop_name, int index)
 {
     if (!strcmp_suffix(prop_name, ",nr-gpios"))
         return NULL;
 
     return parse_suffix_prop_cells(np, prop_name, index, "-gpios",
                        "#gpio-cells");
 }
 
 static struct device_node *parse_iommu_maps(struct device_node *np,
                         const char *prop_name, int index)
 {
     if (strcmp(prop_name, "iommu-map"))
         return NULL;
 
     return of_parse_phandle(np, prop_name, (index * 4) + 1);
 }
 
 static struct device_node *parse_gpio_compat(struct device_node *np,
                          const char *prop_name, int index)
 {
     struct of_phandle_args sup_args;
 
     if (strcmp(prop_name, "gpio") && strcmp(prop_name, "gpios"))
         return NULL;
 
     /*
      * Ignore node with gpio-hog property since its gpios are all provided
      * by its parent.
      */
     if (of_find_property(np, "gpio-hog", NULL))
         return NULL;
 
     if (of_parse_phandle_with_args(np, prop_name, "#gpio-cells", index,
                        &sup_args))
         return NULL;
 
     return sup_args.np;
 }
 
 static struct device_node *parse_interrupts(struct device_node *np,
                         const char *prop_name, int index)
 {
     struct of_phandle_args sup_args;
 
     if (!IS_ENABLED(CONFIG_OF_IRQ) || IS_ENABLED(CONFIG_PPC))
         return NULL;
 
     if (strcmp(prop_name, "interrupts") &&
         strcmp(prop_name, "interrupts-extended"))
         return NULL;
 
     return of_irq_parse_one(np, index, &sup_args) ? NULL : sup_args.np;
 }
 
 static const struct supplier_bindings of_supplier_bindings[] = {
     { .parse_prop = parse_clocks, },
     { .parse_prop = parse_interconnects, },
     { .parse_prop = parse_iommus, .optional = true, },
     { .parse_prop = parse_iommu_maps, .optional = true, },
     { .parse_prop = parse_mboxes, },
     { .parse_prop = parse_io_channels, },
     { .parse_prop = parse_interrupt_parent, },
     { .parse_prop = parse_dmas, .optional = true, },
     { .parse_prop = parse_power_domains, },
     { .parse_prop = parse_hwlocks, },
     { .parse_prop = parse_extcon, },
     { .parse_prop = parse_nvmem_cells, },
     { .parse_prop = parse_phys, },
     { .parse_prop = parse_wakeup_parent, },
     { .parse_prop = parse_pinctrl0, },
     { .parse_prop = parse_pinctrl1, },
     { .parse_prop = parse_pinctrl2, },
     { .parse_prop = parse_pinctrl3, },
     { .parse_prop = parse_pinctrl4, },
     { .parse_prop = parse_pinctrl5, },
     { .parse_prop = parse_pinctrl6, },
     { .parse_prop = parse_pinctrl7, },
     { .parse_prop = parse_pinctrl8, },
     { .parse_prop = parse_remote_endpoint, .node_not_dev = true, },
     { .parse_prop = parse_pwms, },
     { .parse_prop = parse_resets, },
     { .parse_prop = parse_leds, },
     { .parse_prop = parse_backlight, },
     { .parse_prop = parse_gpio_compat, },
     { .parse_prop = parse_interrupts, },
     { .parse_prop = parse_regulators, },
     { .parse_prop = parse_gpio, },
     { .parse_prop = parse_gpios, },
     {}
 };
 
 /**
  * of_link_property - Create device links to suppliers listed in a property
  * @con_np: The consumer device tree node which contains the property
  * @prop_name: Name of property to be parsed
  *
  * This function checks if the property @prop_name that is present in the
  * @con_np device tree node is one of the known common device tree bindings
  * that list phandles to suppliers. If @prop_name isn't one, this function
  * doesn't do anything.
  *
  * If @prop_name is one, this function attempts to create fwnode links from the
  * consumer device tree node @con_np to all the suppliers device tree nodes
  * listed in @prop_name.
  *
  * Any failed attempt to create a fwnode link will NOT result in an immediate
  * return.  of_link_property() must create links to all the available supplier
  * device tree nodes even when attempts to create a link to one or more
  * suppliers fail.
  */
 static int of_link_property(struct device_node *con_np, const char *prop_name)
 {
     struct device_node *phandle;
     const struct supplier_bindings *s = of_supplier_bindings;
     unsigned int i = 0;
     bool matched = false;
 
     /* Do not stop at first failed link, link all available suppliers. */
     while (!matched && s->parse_prop) {
         if (s->optional && !fw_devlink_is_strict()) {
             s++;
             continue;
         }
 
         while ((phandle = s->parse_prop(con_np, prop_name, i))) {
             struct device_node *con_dev_np;
 
             con_dev_np = s->node_not_dev
                     ? of_get_compat_node_parent(con_np)
                     : of_node_get(con_np);
             matched = true;
             i++;
             of_link_to_phandle(con_dev_np, phandle);
             of_node_put(phandle);
             of_node_put(con_dev_np);
         }
         s++;
     }
     return 0;
 }
 
 static void __iomem *of_fwnode_iomap(struct fwnode_handle *fwnode, int index)
 {
 #ifdef CONFIG_OF_ADDRESS
     return of_iomap(to_of_node(fwnode), index);
 #else
     return NULL;
 #endif
 }
 
 static int of_fwnode_irq_get(const struct fwnode_handle *fwnode,
                  unsigned int index)
 {
     return of_irq_get(to_of_node(fwnode), index);
 }
 
 static int of_fwnode_add_links(struct fwnode_handle *fwnode)
 {
     struct property *p;
     struct device_node *con_np = to_of_node(fwnode);
 
     if (IS_ENABLED(CONFIG_X86))
         return 0;
 
     if (!con_np)
         return -EINVAL;
 
     for_each_property_of_node(con_np, p)
         of_link_property(con_np, p->name);
 
     return 0;
 }
 
 const struct fwnode_operations of_fwnode_ops = {
     .get = of_fwnode_get,
     .put = of_fwnode_put,
     .device_is_available = of_fwnode_device_is_available,
     .device_get_match_data = of_fwnode_device_get_match_data,
     .device_dma_supported = of_fwnode_device_dma_supported,
     .device_get_dma_attr = of_fwnode_device_get_dma_attr,
     .property_present = of_fwnode_property_present,
     .property_read_int_array = of_fwnode_property_read_int_array,
     .property_read_string_array = of_fwnode_property_read_string_array,
     .get_name = of_fwnode_get_name,
     .get_name_prefix = of_fwnode_get_name_prefix,
     .get_parent = of_fwnode_get_parent,
     .get_next_child_node = of_fwnode_get_next_child_node,
     .get_named_child_node = of_fwnode_get_named_child_node,
     .get_reference_args = of_fwnode_get_reference_args,
     .graph_get_next_endpoint = of_fwnode_graph_get_next_endpoint,
     .graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint,
     .graph_get_port_parent = of_fwnode_graph_get_port_parent,
     .graph_parse_endpoint = of_fwnode_graph_parse_endpoint,
     .iomap = of_fwnode_iomap,
     .irq_get = of_fwnode_irq_get,
     .add_links = of_fwnode_add_links,
 };
 EXPORT_SYMBOL_GPL(of_fwnode_ops);

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