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![Linus Torvalds](/assets/img/avatar_default.png)
Generally minor changes. A bunch of bug fixes, particularly for initialization and some refactoring. Most notable change if feeding the entire flattened tree into the random pool at boot. May not be significant, but shouldn't hurt either. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJSL12LAAoJEEFnBt12D9kB64gP/RBipnYbo3RPanHg+lE/J1V7 KSVFNGKWJHxTg47VVC1YJGIG21jqxAilpdS2MQL5FP7iyd+IzvtHpQiJgp+2G+pq di06yrdyrYErxRgZgGQi8IpR538ZzOEVLCKJGdb09YelkRzPT5au7CC1MAsX3qco yba7PHk0/Nc4hZE4aGbgR1DlRmn86ob7mM0KFE/LORaSN2BueMgWcwKhQXYNGyoh assX4yNhAbUG6Bgw7paBLDGqHh8c5Ei5AppU8yPb+N094jgYHBJryUoDlzzUHD23 qqiEqHhUKT0TpgHNs8KH0WZFugcmjKvYEbzdzadBxqfXnJN4fKSEcdfF3iz4T14j U6EZks89GoHwA523OghUZkKNOqlsUdWfdKz+8/grQqKisYwDcf3fCxEYk/4weDCQ b6fFlOv6+AI3btjXp6F511ZKxyT4ZZzkHjp/ZSrhBygyamNZfax0ma0j+ZS9AZql kPxQS0nOve6NKaP7vXxMmW5sGMnL19ER/Hm31wthGcWI43GVebUdklnzfGaEeSjs pmP8oiCNemceqVpiPKxcOxiguf/eyIjP1SFXbguASygUmQeTDbbJ8n1FYznCitue xJgWttKWsEf/aMR3eJtQ3aBmHR3rijAV4E28Wlq8XMkocwvpQm2zMocS2Z5BJ80S hi1kQVy8+RxNX96tOSp1 =GSWl -----END PGP SIGNATURE----- Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux Pull device tree core updates from Grant Likely: "Generally minor changes. A bunch of bug fixes, particularly for initialization and some refactoring. Most notable change if feeding the entire flattened tree into the random pool at boot. May not be significant, but shouldn't hurt either" Tim Bird questions whether the boot time cost of the random feeding may be noticeable. And "add_device_randomness()" is definitely not some speed deamon of a function. * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: of/platform: add error reporting to of_amba_device_create() irq/of: Fix comment typo for irq_of_parse_and_map of: Feed entire flattened device tree into the random pool of/fdt: Clean up casting in unflattening path of/fdt: Remove duplicate memory clearing on FDT unflattening gpio: implement gpio-ranges binding document fix of: call __of_parse_phandle_with_args from of_parse_phandle of: introduce of_parse_phandle_with_fixed_args of: move of_parse_phandle() of: move documentation of of_parse_phandle_with_args of: Fix missing memory initialization on FDT unflattening of: consolidate definition of early_init_dt_alloc_memory_arch() of: Make of_get_phy_mode() return int i.s.o. const int include: dt-binding: input: create a DT header defining key codes. of/platform: Staticize of_platform_device_create_pdata() of: Specify initrd location using 64-bit dt: Typo fix OF: make of_property_for_each_{u32|string}() use parameters if OF is not enabled
605 lines
17 KiB
C
605 lines
17 KiB
C
#ifndef _LINUX_OF_H
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#define _LINUX_OF_H
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/*
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* Definitions for talking to the Open Firmware PROM on
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* Power Macintosh and other computers.
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*
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
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* Updates for SPARC64 by David S. Miller
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* Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/errno.h>
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#include <linux/kref.h>
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#include <linux/mod_devicetable.h>
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#include <linux/spinlock.h>
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#include <linux/topology.h>
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#include <linux/notifier.h>
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#include <asm/byteorder.h>
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#include <asm/errno.h>
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typedef u32 phandle;
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typedef u32 ihandle;
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struct property {
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char *name;
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int length;
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void *value;
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struct property *next;
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unsigned long _flags;
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unsigned int unique_id;
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};
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#if defined(CONFIG_SPARC)
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struct of_irq_controller;
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#endif
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struct device_node {
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const char *name;
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const char *type;
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phandle phandle;
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const char *full_name;
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struct property *properties;
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struct property *deadprops; /* removed properties */
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struct device_node *parent;
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struct device_node *child;
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struct device_node *sibling;
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struct device_node *next; /* next device of same type */
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struct device_node *allnext; /* next in list of all nodes */
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struct proc_dir_entry *pde; /* this node's proc directory */
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struct kref kref;
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unsigned long _flags;
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void *data;
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#if defined(CONFIG_SPARC)
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const char *path_component_name;
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unsigned int unique_id;
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struct of_irq_controller *irq_trans;
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#endif
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};
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#define MAX_PHANDLE_ARGS 8
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struct of_phandle_args {
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struct device_node *np;
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int args_count;
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uint32_t args[MAX_PHANDLE_ARGS];
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};
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#ifdef CONFIG_OF_DYNAMIC
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extern struct device_node *of_node_get(struct device_node *node);
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extern void of_node_put(struct device_node *node);
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#else /* CONFIG_OF_DYNAMIC */
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/* Dummy ref counting routines - to be implemented later */
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static inline struct device_node *of_node_get(struct device_node *node)
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{
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return node;
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}
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static inline void of_node_put(struct device_node *node) { }
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#endif /* !CONFIG_OF_DYNAMIC */
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#ifdef CONFIG_OF
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/* Pointer for first entry in chain of all nodes. */
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extern struct device_node *of_allnodes;
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extern struct device_node *of_chosen;
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extern struct device_node *of_aliases;
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extern raw_spinlock_t devtree_lock;
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static inline bool of_have_populated_dt(void)
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{
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return of_allnodes != NULL;
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}
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static inline bool of_node_is_root(const struct device_node *node)
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{
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return node && (node->parent == NULL);
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}
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static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
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{
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return test_bit(flag, &n->_flags);
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}
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static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
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{
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set_bit(flag, &n->_flags);
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}
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extern struct device_node *of_find_all_nodes(struct device_node *prev);
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/*
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* OF address retrieval & translation
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*/
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/* Helper to read a big number; size is in cells (not bytes) */
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static inline u64 of_read_number(const __be32 *cell, int size)
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{
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u64 r = 0;
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while (size--)
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r = (r << 32) | be32_to_cpu(*(cell++));
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return r;
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}
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/* Like of_read_number, but we want an unsigned long result */
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static inline unsigned long of_read_ulong(const __be32 *cell, int size)
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{
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/* toss away upper bits if unsigned long is smaller than u64 */
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return of_read_number(cell, size);
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}
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#include <asm/prom.h>
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/* Default #address and #size cells. Allow arch asm/prom.h to override */
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#if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
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#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
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#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
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#endif
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/* Default string compare functions, Allow arch asm/prom.h to override */
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#if !defined(of_compat_cmp)
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#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
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#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
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#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
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#endif
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/* flag descriptions */
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#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
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#define OF_DETACHED 2 /* node has been detached from the device tree */
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#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
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#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
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#define OF_BAD_ADDR ((u64)-1)
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static inline const char *of_node_full_name(const struct device_node *np)
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{
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return np ? np->full_name : "<no-node>";
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}
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extern struct device_node *of_find_node_by_name(struct device_node *from,
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const char *name);
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#define for_each_node_by_name(dn, name) \
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for (dn = of_find_node_by_name(NULL, name); dn; \
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dn = of_find_node_by_name(dn, name))
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extern struct device_node *of_find_node_by_type(struct device_node *from,
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const char *type);
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#define for_each_node_by_type(dn, type) \
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for (dn = of_find_node_by_type(NULL, type); dn; \
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dn = of_find_node_by_type(dn, type))
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extern struct device_node *of_find_compatible_node(struct device_node *from,
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const char *type, const char *compat);
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#define for_each_compatible_node(dn, type, compatible) \
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for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
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dn = of_find_compatible_node(dn, type, compatible))
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extern struct device_node *of_find_matching_node_and_match(
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struct device_node *from,
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const struct of_device_id *matches,
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const struct of_device_id **match);
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static inline struct device_node *of_find_matching_node(
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struct device_node *from,
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const struct of_device_id *matches)
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{
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return of_find_matching_node_and_match(from, matches, NULL);
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}
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#define for_each_matching_node(dn, matches) \
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for (dn = of_find_matching_node(NULL, matches); dn; \
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dn = of_find_matching_node(dn, matches))
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#define for_each_matching_node_and_match(dn, matches, match) \
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for (dn = of_find_matching_node_and_match(NULL, matches, match); \
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dn; dn = of_find_matching_node_and_match(dn, matches, match))
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extern struct device_node *of_find_node_by_path(const char *path);
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extern struct device_node *of_find_node_by_phandle(phandle handle);
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extern struct device_node *of_get_parent(const struct device_node *node);
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extern struct device_node *of_get_next_parent(struct device_node *node);
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extern struct device_node *of_get_next_child(const struct device_node *node,
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struct device_node *prev);
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extern struct device_node *of_get_next_available_child(
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const struct device_node *node, struct device_node *prev);
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extern struct device_node *of_get_child_by_name(const struct device_node *node,
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const char *name);
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#define for_each_child_of_node(parent, child) \
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for (child = of_get_next_child(parent, NULL); child != NULL; \
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child = of_get_next_child(parent, child))
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#define for_each_available_child_of_node(parent, child) \
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for (child = of_get_next_available_child(parent, NULL); child != NULL; \
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child = of_get_next_available_child(parent, child))
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static inline int of_get_child_count(const struct device_node *np)
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{
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struct device_node *child;
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int num = 0;
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for_each_child_of_node(np, child)
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num++;
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return num;
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}
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extern struct device_node *of_find_node_with_property(
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struct device_node *from, const char *prop_name);
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#define for_each_node_with_property(dn, prop_name) \
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for (dn = of_find_node_with_property(NULL, prop_name); dn; \
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dn = of_find_node_with_property(dn, prop_name))
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extern struct property *of_find_property(const struct device_node *np,
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const char *name,
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int *lenp);
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extern 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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extern int of_property_read_u8_array(const struct device_node *np,
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const char *propname, u8 *out_values, size_t sz);
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extern int of_property_read_u16_array(const struct device_node *np,
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const char *propname, u16 *out_values, size_t sz);
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extern int of_property_read_u32_array(const struct device_node *np,
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const char *propname,
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u32 *out_values,
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size_t sz);
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extern int of_property_read_u64(const struct device_node *np,
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const char *propname, u64 *out_value);
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extern int of_property_read_string(struct device_node *np,
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const char *propname,
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const char **out_string);
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extern int of_property_read_string_index(struct device_node *np,
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const char *propname,
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int index, const char **output);
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extern int of_property_match_string(struct device_node *np,
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const char *propname,
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const char *string);
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extern int of_property_count_strings(struct device_node *np,
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const char *propname);
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extern int of_device_is_compatible(const struct device_node *device,
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const char *);
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extern int of_device_is_available(const struct device_node *device);
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extern const void *of_get_property(const struct device_node *node,
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const char *name,
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int *lenp);
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extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
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#define for_each_property_of_node(dn, pp) \
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for (pp = dn->properties; pp != NULL; pp = pp->next)
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extern int of_n_addr_cells(struct device_node *np);
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extern int of_n_size_cells(struct device_node *np);
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extern const struct of_device_id *of_match_node(
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const struct of_device_id *matches, const struct device_node *node);
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extern int of_modalias_node(struct device_node *node, char *modalias, int len);
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extern struct device_node *of_parse_phandle(const struct device_node *np,
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const char *phandle_name,
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int index);
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extern int of_parse_phandle_with_args(const struct device_node *np,
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const char *list_name, const char *cells_name, int index,
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struct of_phandle_args *out_args);
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extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
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const char *list_name, int cells_count, int index,
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struct of_phandle_args *out_args);
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extern int of_count_phandle_with_args(const struct device_node *np,
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const char *list_name, const char *cells_name);
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extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
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extern int of_alias_get_id(struct device_node *np, const char *stem);
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extern int of_machine_is_compatible(const char *compat);
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extern int of_add_property(struct device_node *np, struct property *prop);
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extern int of_remove_property(struct device_node *np, struct property *prop);
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extern int of_update_property(struct device_node *np, struct property *newprop);
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/* For updating the device tree at runtime */
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#define OF_RECONFIG_ATTACH_NODE 0x0001
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#define OF_RECONFIG_DETACH_NODE 0x0002
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#define OF_RECONFIG_ADD_PROPERTY 0x0003
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#define OF_RECONFIG_REMOVE_PROPERTY 0x0004
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#define OF_RECONFIG_UPDATE_PROPERTY 0x0005
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struct of_prop_reconfig {
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struct device_node *dn;
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struct property *prop;
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};
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extern int of_reconfig_notifier_register(struct notifier_block *);
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extern int of_reconfig_notifier_unregister(struct notifier_block *);
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extern int of_reconfig_notify(unsigned long, void *);
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extern int of_attach_node(struct device_node *);
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extern int of_detach_node(struct device_node *);
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#define of_match_ptr(_ptr) (_ptr)
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/*
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* struct property *prop;
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* const __be32 *p;
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* u32 u;
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*
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* of_property_for_each_u32(np, "propname", prop, p, u)
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* printk("U32 value: %x\n", u);
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*/
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const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
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u32 *pu);
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/*
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* struct property *prop;
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* const char *s;
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*
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* of_property_for_each_string(np, "propname", prop, s)
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* printk("String value: %s\n", s);
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*/
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const char *of_prop_next_string(struct property *prop, const char *cur);
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int of_device_is_stdout_path(struct device_node *dn);
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#else /* CONFIG_OF */
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static inline const char* of_node_full_name(struct device_node *np)
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{
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return "<no-node>";
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}
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static inline struct device_node *of_find_node_by_name(struct device_node *from,
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const char *name)
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{
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return NULL;
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}
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static inline struct device_node *of_get_parent(const struct device_node *node)
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{
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return NULL;
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}
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static inline bool of_have_populated_dt(void)
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{
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return false;
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}
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#define for_each_child_of_node(parent, child) \
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while (0)
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static inline struct device_node *of_get_child_by_name(
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const struct device_node *node,
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const char *name)
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{
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return NULL;
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}
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static inline int of_get_child_count(const struct device_node *np)
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{
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return 0;
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}
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static inline int of_device_is_compatible(const struct device_node *device,
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const char *name)
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{
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return 0;
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}
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static inline int of_device_is_available(const struct device_node *device)
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{
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return 0;
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}
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static inline struct property *of_find_property(const struct device_node *np,
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const char *name,
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int *lenp)
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{
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return NULL;
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}
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static inline struct device_node *of_find_compatible_node(
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struct device_node *from,
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const char *type,
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const char *compat)
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{
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return NULL;
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}
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static inline int of_property_read_u32_index(const struct device_node *np,
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const char *propname, u32 index, u32 *out_value)
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{
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return -ENOSYS;
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}
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static inline int of_property_read_u8_array(const struct device_node *np,
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const char *propname, u8 *out_values, size_t sz)
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{
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return -ENOSYS;
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}
|
|
|
|
static inline int of_property_read_u16_array(const struct device_node *np,
|
|
const char *propname, u16 *out_values, size_t sz)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_read_u32_array(const struct device_node *np,
|
|
const char *propname,
|
|
u32 *out_values, size_t sz)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_read_string(struct device_node *np,
|
|
const char *propname,
|
|
const char **out_string)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_read_string_index(struct device_node *np,
|
|
const char *propname, int index,
|
|
const char **out_string)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_count_strings(struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline const void *of_get_property(const struct device_node *node,
|
|
const char *name,
|
|
int *lenp)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_get_cpu_node(int cpu,
|
|
unsigned int *thread)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int of_property_read_u64(const struct device_node *np,
|
|
const char *propname, u64 *out_value)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_match_string(struct device_node *np,
|
|
const char *propname,
|
|
const char *string)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline struct device_node *of_parse_phandle(const struct device_node *np,
|
|
const char *phandle_name,
|
|
int index)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int of_parse_phandle_with_args(struct device_node *np,
|
|
const char *list_name,
|
|
const char *cells_name,
|
|
int index,
|
|
struct of_phandle_args *out_args)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
|
|
const char *list_name, int cells_count, int index,
|
|
struct of_phandle_args *out_args)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_count_phandle_with_args(struct device_node *np,
|
|
const char *list_name,
|
|
const char *cells_name)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_alias_get_id(struct device_node *np, const char *stem)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_machine_is_compatible(const char *compat)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int of_device_is_stdout_path(struct device_node *dn)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline const __be32 *of_prop_next_u32(struct property *prop,
|
|
const __be32 *cur, u32 *pu)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline const char *of_prop_next_string(struct property *prop,
|
|
const char *cur)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#define of_match_ptr(_ptr) NULL
|
|
#define of_match_node(_matches, _node) NULL
|
|
#endif /* CONFIG_OF */
|
|
|
|
#ifndef of_node_to_nid
|
|
static inline int of_node_to_nid(struct device_node *np)
|
|
{
|
|
return numa_node_id();
|
|
}
|
|
|
|
#define of_node_to_nid of_node_to_nid
|
|
#endif
|
|
|
|
/**
|
|
* of_property_read_bool - Findfrom a property
|
|
* @np: device node from which the property value is to be read.
|
|
* @propname: name of the property to be searched.
|
|
*
|
|
* Search for a property in a device node.
|
|
* Returns true if the property exist false otherwise.
|
|
*/
|
|
static inline bool of_property_read_bool(const struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
struct property *prop = of_find_property(np, propname, NULL);
|
|
|
|
return prop ? true : false;
|
|
}
|
|
|
|
static inline int of_property_read_u8(const struct device_node *np,
|
|
const char *propname,
|
|
u8 *out_value)
|
|
{
|
|
return of_property_read_u8_array(np, propname, out_value, 1);
|
|
}
|
|
|
|
static inline int of_property_read_u16(const struct device_node *np,
|
|
const char *propname,
|
|
u16 *out_value)
|
|
{
|
|
return of_property_read_u16_array(np, propname, out_value, 1);
|
|
}
|
|
|
|
static inline int of_property_read_u32(const struct device_node *np,
|
|
const char *propname,
|
|
u32 *out_value)
|
|
{
|
|
return of_property_read_u32_array(np, propname, out_value, 1);
|
|
}
|
|
|
|
#define of_property_for_each_u32(np, propname, prop, p, u) \
|
|
for (prop = of_find_property(np, propname, NULL), \
|
|
p = of_prop_next_u32(prop, NULL, &u); \
|
|
p; \
|
|
p = of_prop_next_u32(prop, p, &u))
|
|
|
|
#define of_property_for_each_string(np, propname, prop, s) \
|
|
for (prop = of_find_property(np, propname, NULL), \
|
|
s = of_prop_next_string(prop, NULL); \
|
|
s; \
|
|
s = of_prop_next_string(prop, s))
|
|
|
|
#if defined(CONFIG_PROC_FS) && defined(CONFIG_PROC_DEVICETREE)
|
|
extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
|
|
extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
|
|
extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
|
|
struct property *prop);
|
|
extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
|
|
struct property *newprop,
|
|
struct property *oldprop);
|
|
#endif
|
|
|
|
#endif /* _LINUX_OF_H */
|