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1529 lines
44 KiB
1529 lines
44 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
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* drivers/of/property.c - Procedures for accessing and interpreting |
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* Devicetree properties and graphs. |
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* |
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* Initially created by copying procedures from drivers/of/base.c. This |
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* file contains the OF property as well as the OF graph interface |
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* functions. |
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* |
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* Paul Mackerras August 1996. |
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* Copyright (C) 1996-2005 Paul Mackerras. |
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* |
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. |
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* {engebret|bergner}@us.ibm.com |
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* |
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* Adapted for sparc and sparc64 by David S. Miller [email protected] |
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* |
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* Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and |
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* Grant Likely. |
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*/ |
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|
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#define pr_fmt(fmt) "OF: " fmt |
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|
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/of_device.h> |
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#include <linux/of_graph.h> |
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#include <linux/of_irq.h> |
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#include <linux/string.h> |
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#include <linux/moduleparam.h> |
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|
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#include "of_private.h" |
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|
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/** |
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* of_graph_is_present() - check graph's presence |
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* @node: pointer to device_node containing graph port |
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* |
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* Return: True if @node has a port or ports (with a port) sub-node, |
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* false otherwise. |
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*/ |
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bool of_graph_is_present(const struct device_node *node) |
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{ |
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struct device_node *ports, *port; |
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|
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ports = of_get_child_by_name(node, "ports"); |
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if (ports) |
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node = ports; |
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|
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port = of_get_child_by_name(node, "port"); |
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of_node_put(ports); |
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of_node_put(port); |
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|
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return !!port; |
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} |
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EXPORT_SYMBOL(of_graph_is_present); |
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|
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/** |
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* of_property_count_elems_of_size - Count the number of elements in a property |
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* |
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* @np: device node from which the property value is to be read. |
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* @propname: name of the property to be searched. |
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* @elem_size: size of the individual element |
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* |
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* Search for a property in a device node and count the number of elements of |
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* size elem_size in it. |
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* |
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* Return: The number of elements on sucess, -EINVAL if the property does not |
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* exist or its length does not match a multiple of elem_size and -ENODATA if |
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* the property does not have a value. |
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*/ |
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int of_property_count_elems_of_size(const struct device_node *np, |
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const char *propname, int elem_size) |
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{ |
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struct property *prop = of_find_property(np, propname, NULL); |
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|
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if (!prop) |
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return -EINVAL; |
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if (!prop->value) |
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return -ENODATA; |
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|
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if (prop->length % elem_size != 0) { |
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pr_err("size of %s in node %pOF is not a multiple of %d\n", |
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propname, np, elem_size); |
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return -EINVAL; |
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} |
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|
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return prop->length / elem_size; |
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} |
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EXPORT_SYMBOL_GPL(of_property_count_elems_of_size); |
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|
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/** |
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* of_find_property_value_of_size |
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* |
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* @np: device node from which the property value is to be read. |
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* @propname: name of the property to be searched. |
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* @min: minimum allowed length of property value |
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* @max: maximum allowed length of property value (0 means unlimited) |
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* @len: if !=NULL, actual length is written to here |
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* |
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* Search for a property in a device node and valid the requested size. |
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* |
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* Return: The property value on success, -EINVAL if the property does not |
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* exist, -ENODATA if property does not have a value, and -EOVERFLOW if the |
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* property data is too small or too large. |
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* |
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*/ |
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static void *of_find_property_value_of_size(const struct device_node *np, |
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const char *propname, u32 min, u32 max, size_t *len) |
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{ |
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struct property *prop = of_find_property(np, propname, NULL); |
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|
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if (!prop) |
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return ERR_PTR(-EINVAL); |
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if (!prop->value) |
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return ERR_PTR(-ENODATA); |
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if (prop->length < min) |
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return ERR_PTR(-EOVERFLOW); |
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if (max && prop->length > max) |
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return ERR_PTR(-EOVERFLOW); |
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|
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if (len) |
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*len = prop->length; |
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|
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return prop->value; |
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} |
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|
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/** |
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* of_property_read_u32_index - Find and read a u32 from a multi-value property. |
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* |
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* @np: device node from which the property value is to be read. |
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* @propname: name of the property to be searched. |
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* @index: index of the u32 in the list of values |
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* @out_value: pointer to return value, modified only if no error. |
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* |
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* Search for a property in a device node and read nth 32-bit value from |
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* it. |
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* |
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* Return: 0 on success, -EINVAL if the property does not exist, |
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* -ENODATA if property does not have a value, and -EOVERFLOW if the |
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* property data isn't large enough. |
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* |
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* The out_value is modified only if a valid u32 value can be decoded. |
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*/ |
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int of_property_read_u32_index(const struct device_node *np, |
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const char *propname, |
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u32 index, u32 *out_value) |
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{ |
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const u32 *val = of_find_property_value_of_size(np, propname, |
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((index + 1) * sizeof(*out_value)), |
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0, |
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NULL); |
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|
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if (IS_ERR(val)) |
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return PTR_ERR(val); |
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|
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*out_value = be32_to_cpup(((__be32 *)val) + index); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(of_property_read_u32_index); |
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|
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/** |
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* of_property_read_u64_index - Find and read a u64 from a multi-value property. |
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* |
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* @np: device node from which the property value is to be read. |
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* @propname: name of the property to be searched. |
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* @index: index of the u64 in the list of values |
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* @out_value: pointer to return value, modified only if no error. |
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* |
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* Search for a property in a device node and read nth 64-bit value from |
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* it. |
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* |
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* Return: 0 on success, -EINVAL if the property does not exist, |
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* -ENODATA if property does not have a value, and -EOVERFLOW if the |
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* property data isn't large enough. |
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* |
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* The out_value is modified only if a valid u64 value can be decoded. |
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*/ |
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int of_property_read_u64_index(const struct device_node *np, |
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const char *propname, |
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u32 index, u64 *out_value) |
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{ |
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const u64 *val = of_find_property_value_of_size(np, propname, |
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((index + 1) * sizeof(*out_value)), |
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0, NULL); |
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|
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if (IS_ERR(val)) |
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return PTR_ERR(val); |
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|
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*out_value = be64_to_cpup(((__be64 *)val) + index); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(of_property_read_u64_index); |
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|
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/** |
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* of_property_read_variable_u8_array - Find and read an array of u8 from a |
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* property, with bounds on the minimum and maximum array size. |
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* |
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* @np: device node from which the property value is to be read. |
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* @propname: name of the property to be searched. |
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* @out_values: pointer to found values. |
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* @sz_min: minimum number of array elements to read |
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* @sz_max: maximum number of array elements to read, if zero there is no |
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* upper limit on the number of elements in the dts entry but only |
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* sz_min will be read. |
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* |
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* Search for a property in a device node and read 8-bit value(s) from |
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* it. |
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* |
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* dts entry of array should be like: |
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* ``property = /bits/ 8 <0x50 0x60 0x70>;`` |
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* |
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* Return: The number of elements read on success, -EINVAL if the property |
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* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW |
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* if the property data is smaller than sz_min or longer than sz_max. |
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* |
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* The out_values is modified only if a valid u8 value can be decoded. |
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*/ |
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int of_property_read_variable_u8_array(const struct device_node *np, |
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const char *propname, u8 *out_values, |
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size_t sz_min, size_t sz_max) |
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{ |
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size_t sz, count; |
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const u8 *val = of_find_property_value_of_size(np, propname, |
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(sz_min * sizeof(*out_values)), |
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(sz_max * sizeof(*out_values)), |
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&sz); |
|
|
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if (IS_ERR(val)) |
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return PTR_ERR(val); |
|
|
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if (!sz_max) |
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sz = sz_min; |
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else |
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sz /= sizeof(*out_values); |
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|
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count = sz; |
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while (count--) |
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*out_values++ = *val++; |
|
|
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return sz; |
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} |
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EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array); |
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|
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/** |
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* of_property_read_variable_u16_array - Find and read an array of u16 from a |
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* property, with bounds on the minimum and maximum array size. |
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* |
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* @np: device node from which the property value is to be read. |
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* @propname: name of the property to be searched. |
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* @out_values: pointer to found values. |
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* @sz_min: minimum number of array elements to read |
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* @sz_max: maximum number of array elements to read, if zero there is no |
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* upper limit on the number of elements in the dts entry but only |
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* sz_min will be read. |
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* |
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* Search for a property in a device node and read 16-bit value(s) from |
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* it. |
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* |
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* dts entry of array should be like: |
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* ``property = /bits/ 16 <0x5000 0x6000 0x7000>;`` |
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* |
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* 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 |
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* if the property data is smaller than sz_min or longer than sz_max. |
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* |
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* The out_values is modified only if a valid u16 value can be decoded. |
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*/ |
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int of_property_read_variable_u16_array(const struct device_node *np, |
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const char *propname, u16 *out_values, |
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size_t sz_min, size_t sz_max) |
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{ |
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size_t sz, count; |
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const __be16 *val = of_find_property_value_of_size(np, propname, |
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(sz_min * sizeof(*out_values)), |
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(sz_max * sizeof(*out_values)), |
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&sz); |
|
|
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if (IS_ERR(val)) |
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return PTR_ERR(val); |
|
|
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if (!sz_max) |
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sz = sz_min; |
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else |
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sz /= sizeof(*out_values); |
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|
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count = sz; |
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while (count--) |
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*out_values++ = be16_to_cpup(val++); |
|
|
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return sz; |
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} |
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EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array); |
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|
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/** |
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* of_property_read_variable_u32_array - Find and read an array of 32 bit |
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* integers from a property, with bounds on the minimum and maximum array size. |
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* |
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* @np: device node from which the property value is to be read. |
|
* @propname: name of the property to be searched. |
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* @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. |
|
* |
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* 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. |
|
* |
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* The out_values is modified only if a valid u32 value can be decoded. |
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*/ |
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int of_property_read_variable_u32_array(const struct device_node *np, |
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const char *propname, u32 *out_values, |
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size_t sz_min, size_t sz_max) |
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{ |
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size_t sz, count; |
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const __be32 *val = of_find_property_value_of_size(np, propname, |
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(sz_min * sizeof(*out_values)), |
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(sz_max * sizeof(*out_values)), |
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&sz); |
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|
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if (IS_ERR(val)) |
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return PTR_ERR(val); |
|
|
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if (!sz_max) |
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sz = sz_min; |
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else |
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sz /= sizeof(*out_values); |
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|
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count = sz; |
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while (count--) |
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*out_values++ = be32_to_cpup(val++); |
|
|
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return sz; |
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} |
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EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array); |
|
|
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/** |
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* of_property_read_u64 - Find and read a 64 bit integer from a property |
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* @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. |
|
* |
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* The out_value is modified only if a valid u64 value can be decoded. |
|
*/ |
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int of_property_read_u64(const struct device_node *np, const char *propname, |
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u64 *out_value) |
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{ |
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const __be32 *val = of_find_property_value_of_size(np, propname, |
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sizeof(*out_value), |
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0, |
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NULL); |
|
|
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if (IS_ERR(val)) |
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return PTR_ERR(val); |
|
|
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*out_value = of_read_number(val, 2); |
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return 0; |
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} |
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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) { |
|
of_node_put(of_args.np); |
|
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);
|
|
|