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![Linus Torvalds](/assets/img/avatar_default.png)
Lots of activity in the devicetree code for v3.18. Most of it is related to getting all of the overlay support code in place, but there are other important things in there. There are a few trivial merge conflicts. They shouldn't give you any trouble. Highlights: - OF_RECONFIG notifiers for SPI, I2C and Platform devices. Those subsystems can now respond to live changes to the device tree. - CONFIG_OF_OVERLAY method for applying live changes to the device tree - Removal of the of_allnodes list. This used to be used to iterate over all the nodes in the device tree, but it is unnecessary because the same thing can be done by iterating over the list of child pointers. Getting rid of of_allnodes saves some memory and avoids the possibility of of_allnodes being sorted differently from the child lists. - Support for retrieving original DTB blob via sysfs. Needed by kexec. - More unittests - Documentation and minor bug fixes -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJUiaTJAAoJEMWQL496c2LNdKkP/1rk20JXzJc948Z3VFZPXkzf TUKXC+Qn0FmVjQhESkx6LxLDrMDTQlQLlWBmFuWRB87Fk5E32FEf5zzW7I9oQPS4 msIqJoYf5T7EPlmJ/85156xjK5ezc0OyoKEizn23mcKrJE4bmXQEbVw99UUFhq4R Oz1a1ZPQQSSaMteKftOoRBiE3bJut3tJ3dfufNjwOuXi5rALJ0DVxuOeU/Hba13d t05qlImwocKXGBDd/B4psBI5fZl4Tf4AmGOD9aU7YHxrLg4jOCbvqies3DQQ0q3D o9YZBnuBw7A3tzJJ3F5KajRnFLazJBOV5BKGo7eYuTzT56mpZW/HF6eS9b1DbP9x 4q71Vd5qhIuU9JsQAStfZ6pdx3FBXRNGpIXXfwzbCSdaePIuOKS17zvA/Iy5bWeA 2TyqgMuKZwnXOXxQesMZJYIw2IEnIyobzh0A1wAnvReyos/nHF/tha/SA/Jutq1s +0gOkMlPW2EdpADmlfLPRSHgSqO8bfCPeNPihn672MS2dAv9H+XRLcoKuSNErhdl 1gYtnR7IK+Sl0KmMC5YoMvXPchkV5YS2qEp1f3p+ZmgcMSWyHHKMtf8VwjNTaSBU e1AshH6HvmYEPt0cnntSMAxbw+N596QjkVp4RbHsLpyj7qeUVVY56/K/aiM7M69P BvJkuewrhsAxyM2X2OsD =ak0A -----END PGP SIGNATURE----- Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux Pull devicetree changes from Grant Likely: "Lots of activity in the devicetree code for v3.18. Most of it is related to getting all of the overlay support code in place, but there are other important things in there. Highlights: - OF_RECONFIG notifiers for SPI, I2C and Platform devices. Those subsystems can now respond to live changes to the device tree. - CONFIG_OF_OVERLAY method for applying live changes to the device tree - Removal of the of_allnodes list. This used to be used to iterate over all the nodes in the device tree, but it is unnecessary because the same thing can be done by iterating over the list of child pointers. Getting rid of of_allnodes saves some memory and avoids the possibility of of_allnodes being sorted differently from the child lists. - Support for retrieving original DTB blob via sysfs. Needed by kexec. - More unittests - Documentation and minor bug fixes" * tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (42 commits) of: Delete unnecessary check before calling "of_node_put()" of: Drop ->next pointer from struct device_node spi: Check for spi_of_notifier when CONFIG_OF_DYNAMIC=y of: support passing console options with stdout-path of: add optional options parameter to of_find_node_by_path() of: Add bindings for chosen node, stdout-path of: Remove unneeded and incorrect MODULE_DEVICE_TABLE ARM: dt: fix up PL011 device tree bindings of: base, fix of_property_read_string_helper kernel-doc of: remove select of non-existant OF_DEVICE config symbol spi/of: Add OF notifier handler spi/of: Create new device registration method and accessors i2c/of: Add OF_RECONFIG notifier handler i2c/of: Factor out Devicetree registration code of/overlay: Add overlay unittests of/overlay: Introduce DT overlay support of/reconfig: Add OF_DYNAMIC notifier for platform_bus_type of/reconfig: Always use the same structure for notifiers of/reconfig: Add debug output for OF_RECONFIG notifiers of/reconfig: Add empty stubs for the of_reconfig methods ...
1046 lines
31 KiB
C
1046 lines
31 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/kobject.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 <linux/property.h>
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#include <linux/list.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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struct bin_attribute attr;
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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 fwnode_handle fwnode;
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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 kobject kobj;
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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 16
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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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struct of_reconfig_data {
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struct device_node *dn;
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struct property *prop;
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struct property *old_prop;
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};
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/* initialize a node */
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extern struct kobj_type of_node_ktype;
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static inline void of_node_init(struct device_node *node)
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{
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kobject_init(&node->kobj, &of_node_ktype);
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node->fwnode.type = FWNODE_OF;
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}
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/* true when node is initialized */
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static inline int of_node_is_initialized(struct device_node *node)
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{
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return node && node->kobj.state_initialized;
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}
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/* true when node is attached (i.e. present on sysfs) */
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static inline int of_node_is_attached(struct device_node *node)
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{
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return node && node->kobj.state_in_sysfs;
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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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/* Pointer for first entry in chain of all nodes. */
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extern struct device_node *of_root;
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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 struct device_node *of_stdout;
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extern raw_spinlock_t devtree_lock;
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#ifdef CONFIG_OF
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static inline bool is_of_node(struct fwnode_handle *fwnode)
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{
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return fwnode && fwnode->type == FWNODE_OF;
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}
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static inline struct device_node *of_node(struct fwnode_handle *fwnode)
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{
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return fwnode ? container_of(fwnode, struct device_node, fwnode) : 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 of_root != 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 int of_node_test_and_set_flag(struct device_node *n,
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unsigned long flag)
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{
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return test_and_set_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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static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
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{
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clear_bit(flag, &n->_flags);
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}
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static inline int of_property_check_flag(struct property *p, unsigned long flag)
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{
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return test_bit(flag, &p->_flags);
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}
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static inline void of_property_set_flag(struct property *p, unsigned long flag)
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{
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set_bit(flag, &p->_flags);
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}
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static inline void of_property_clear_flag(struct property *p, unsigned long flag)
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{
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clear_bit(flag, &p->_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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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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#if defined(CONFIG_SPARC)
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#include <asm/prom.h>
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#endif
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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_POPULATED 3 /* device already created for the node */
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#define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */
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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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#define for_each_of_allnodes_from(from, dn) \
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for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
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#define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
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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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extern struct device_node *of_find_node_by_type(struct device_node *from,
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const char *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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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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extern struct device_node *of_find_node_opts_by_path(const char *path,
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const char **opts);
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static inline struct device_node *of_find_node_by_path(const char *path)
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{
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return of_find_node_opts_by_path(path, NULL);
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}
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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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/* cache lookup */
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extern struct device_node *of_find_next_cache_node(const struct device_node *);
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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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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_count_elems_of_size(const struct device_node *np,
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const char *propname, int elem_size);
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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_u64_array(const struct device_node *np,
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const char *propname,
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u64 *out_values,
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size_t sz);
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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_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_read_string_helper(struct device_node *np,
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const char *propname,
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const char **out_strs, size_t sz, int index);
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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 bool 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 void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
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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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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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bool of_console_check(struct device_node *dn, char *name, int index);
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#else /* CONFIG_OF */
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static inline bool is_of_node(struct fwnode_handle *fwnode)
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{
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return false;
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}
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static inline struct device_node *of_node(struct fwnode_handle *fwnode)
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{
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return NULL;
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}
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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 "<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)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_find_node_by_type(struct device_node *from,
|
|
const char *type)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_find_matching_node_and_match(
|
|
struct device_node *from,
|
|
const struct of_device_id *matches,
|
|
const struct of_device_id **match)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_find_node_by_path(const char *path)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_find_node_opts_by_path(const char *path,
|
|
const char **opts)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_get_parent(const struct device_node *node)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_get_next_child(
|
|
const struct device_node *node, struct device_node *prev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_get_next_available_child(
|
|
const struct device_node *node, struct device_node *prev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_find_node_with_property(
|
|
struct device_node *from, const char *prop_name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool of_have_populated_dt(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct device_node *of_get_child_by_name(
|
|
const struct device_node *node,
|
|
const char *name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int of_device_is_compatible(const struct device_node *device,
|
|
const char *name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool of_device_is_available(const struct device_node *device)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct property *of_find_property(const struct device_node *np,
|
|
const char *name,
|
|
int *lenp)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *of_find_compatible_node(
|
|
struct device_node *from,
|
|
const char *type,
|
|
const char *compat)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int of_property_count_elems_of_size(const struct device_node *np,
|
|
const char *propname, int elem_size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_read_u32_index(const struct device_node *np,
|
|
const char *propname, u32 index, u32 *out_value)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int of_property_read_u8_array(const struct device_node *np,
|
|
const char *propname, u8 *out_values, size_t sz)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
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_u64_array(const struct device_node *np,
|
|
const char *propname,
|
|
u64 *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_helper(struct device_node *np,
|
|
const char *propname,
|
|
const char **out_strs, size_t sz, int index)
|
|
{
|
|
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 bool of_console_check(const struct device_node *dn, const char *name, int index)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
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 */
|
|
|
|
#if defined(CONFIG_OF) && defined(CONFIG_NUMA)
|
|
extern int of_node_to_nid(struct device_node *np);
|
|
#else
|
|
static inline int of_node_to_nid(struct device_node *device) { return 0; }
|
|
#endif
|
|
|
|
static inline struct device_node *of_find_matching_node(
|
|
struct device_node *from,
|
|
const struct of_device_id *matches)
|
|
{
|
|
return of_find_matching_node_and_match(from, matches, NULL);
|
|
}
|
|
|
|
/**
|
|
* of_property_count_u8_elems - Count the number of u8 elements in 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 and count the number of u8 elements
|
|
* in it. Returns number of elements on sucess, -EINVAL if the property does
|
|
* not exist or its length does not match a multiple of u8 and -ENODATA if the
|
|
* property does not have a value.
|
|
*/
|
|
static inline int of_property_count_u8_elems(const struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
return of_property_count_elems_of_size(np, propname, sizeof(u8));
|
|
}
|
|
|
|
/**
|
|
* of_property_count_u16_elems - Count the number of u16 elements in 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 and count the number of u16 elements
|
|
* in it. Returns number of elements on sucess, -EINVAL if the property does
|
|
* not exist or its length does not match a multiple of u16 and -ENODATA if the
|
|
* property does not have a value.
|
|
*/
|
|
static inline int of_property_count_u16_elems(const struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
return of_property_count_elems_of_size(np, propname, sizeof(u16));
|
|
}
|
|
|
|
/**
|
|
* of_property_count_u32_elems - Count the number of u32 elements in 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 and count the number of u32 elements
|
|
* in it. Returns number of elements on sucess, -EINVAL if the property does
|
|
* not exist or its length does not match a multiple of u32 and -ENODATA if the
|
|
* property does not have a value.
|
|
*/
|
|
static inline int of_property_count_u32_elems(const struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
return of_property_count_elems_of_size(np, propname, sizeof(u32));
|
|
}
|
|
|
|
/**
|
|
* of_property_count_u64_elems - Count the number of u64 elements in 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 and count the number of u64 elements
|
|
* in it. Returns number of elements on sucess, -EINVAL if the property does
|
|
* not exist or its length does not match a multiple of u64 and -ENODATA if the
|
|
* property does not have a value.
|
|
*/
|
|
static inline int of_property_count_u64_elems(const struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
return of_property_count_elems_of_size(np, propname, sizeof(u64));
|
|
}
|
|
|
|
/**
|
|
* of_property_read_string_array() - Read an array of strings from a multiple
|
|
* strings property.
|
|
* @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.
|
|
*
|
|
* Search for a property in a device tree node and retrieve a list of
|
|
* terminated string values (pointer to data, not a copy) in that property.
|
|
*
|
|
* If @out_strs is NULL, the number of strings in the property is returned.
|
|
*/
|
|
static inline int of_property_read_string_array(struct device_node *np,
|
|
const char *propname, const char **out_strs,
|
|
size_t sz)
|
|
{
|
|
return of_property_read_string_helper(np, propname, out_strs, sz, 0);
|
|
}
|
|
|
|
/**
|
|
* of_property_count_strings() - Find and return the number of strings from a
|
|
* multiple strings 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 tree node and retrieve the number of null
|
|
* terminated string contain in it. Returns the number of strings 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.
|
|
*/
|
|
static inline int of_property_count_strings(struct device_node *np,
|
|
const char *propname)
|
|
{
|
|
return of_property_read_string_helper(np, propname, NULL, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* of_property_read_string_index() - Find and read a string from a multiple
|
|
* strings property.
|
|
* @np: device node from which the property value is to be read.
|
|
* @propname: name of the property to be searched.
|
|
* @index: index of the string in the list of strings
|
|
* @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) in the list of strings
|
|
* contained in that property.
|
|
* Returns 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.
|
|
*
|
|
* The out_string pointer is modified only if a valid string can be decoded.
|
|
*/
|
|
static inline int of_property_read_string_index(struct device_node *np,
|
|
const char *propname,
|
|
int index, const char **output)
|
|
{
|
|
int rc = of_property_read_string_helper(np, propname, output, 1, index);
|
|
return rc < 0 ? rc : 0;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
static inline int of_property_read_s32(const struct device_node *np,
|
|
const char *propname,
|
|
s32 *out_value)
|
|
{
|
|
return of_property_read_u32(np, propname, (u32*) out_value);
|
|
}
|
|
|
|
#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))
|
|
|
|
#define for_each_node_by_name(dn, name) \
|
|
for (dn = of_find_node_by_name(NULL, name); dn; \
|
|
dn = of_find_node_by_name(dn, name))
|
|
#define for_each_node_by_type(dn, type) \
|
|
for (dn = of_find_node_by_type(NULL, type); dn; \
|
|
dn = of_find_node_by_type(dn, type))
|
|
#define for_each_compatible_node(dn, type, compatible) \
|
|
for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
|
|
dn = of_find_compatible_node(dn, type, compatible))
|
|
#define for_each_matching_node(dn, matches) \
|
|
for (dn = of_find_matching_node(NULL, matches); dn; \
|
|
dn = of_find_matching_node(dn, matches))
|
|
#define for_each_matching_node_and_match(dn, matches, match) \
|
|
for (dn = of_find_matching_node_and_match(NULL, matches, match); \
|
|
dn; dn = of_find_matching_node_and_match(dn, matches, match))
|
|
|
|
#define for_each_child_of_node(parent, child) \
|
|
for (child = of_get_next_child(parent, NULL); child != NULL; \
|
|
child = of_get_next_child(parent, child))
|
|
#define for_each_available_child_of_node(parent, child) \
|
|
for (child = of_get_next_available_child(parent, NULL); child != NULL; \
|
|
child = of_get_next_available_child(parent, child))
|
|
|
|
#define for_each_node_with_property(dn, prop_name) \
|
|
for (dn = of_find_node_with_property(NULL, prop_name); dn; \
|
|
dn = of_find_node_with_property(dn, prop_name))
|
|
|
|
static inline int of_get_child_count(const struct device_node *np)
|
|
{
|
|
struct device_node *child;
|
|
int num = 0;
|
|
|
|
for_each_child_of_node(np, child)
|
|
num++;
|
|
|
|
return num;
|
|
}
|
|
|
|
static inline int of_get_available_child_count(const struct device_node *np)
|
|
{
|
|
struct device_node *child;
|
|
int num = 0;
|
|
|
|
for_each_available_child_of_node(np, child)
|
|
num++;
|
|
|
|
return num;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
#define _OF_DECLARE(table, name, compat, fn, fn_type) \
|
|
static const struct of_device_id __of_table_##name \
|
|
__used __section(__##table##_of_table) \
|
|
= { .compatible = compat, \
|
|
.data = (fn == (fn_type)NULL) ? fn : fn }
|
|
#else
|
|
#define _OF_DECLARE(table, name, compat, fn, fn_type) \
|
|
static const struct of_device_id __of_table_##name \
|
|
__attribute__((unused)) \
|
|
= { .compatible = compat, \
|
|
.data = (fn == (fn_type)NULL) ? fn : fn }
|
|
#endif
|
|
|
|
typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
|
|
typedef void (*of_init_fn_1)(struct device_node *);
|
|
|
|
#define OF_DECLARE_1(table, name, compat, fn) \
|
|
_OF_DECLARE(table, name, compat, fn, of_init_fn_1)
|
|
#define OF_DECLARE_2(table, name, compat, fn) \
|
|
_OF_DECLARE(table, name, compat, fn, of_init_fn_2)
|
|
|
|
/**
|
|
* struct of_changeset_entry - Holds a changeset entry
|
|
*
|
|
* @node: list_head for the log list
|
|
* @action: notifier action
|
|
* @np: pointer to the device node affected
|
|
* @prop: pointer to the property affected
|
|
* @old_prop: hold a pointer to the original property
|
|
*
|
|
* Every modification of the device tree during a changeset
|
|
* is held in a list of of_changeset_entry structures.
|
|
* That way we can recover from a partial application, or we can
|
|
* revert the changeset
|
|
*/
|
|
struct of_changeset_entry {
|
|
struct list_head node;
|
|
unsigned long action;
|
|
struct device_node *np;
|
|
struct property *prop;
|
|
struct property *old_prop;
|
|
};
|
|
|
|
/**
|
|
* struct of_changeset - changeset tracker structure
|
|
*
|
|
* @entries: list_head for the changeset entries
|
|
*
|
|
* changesets are a convenient way to apply bulk changes to the
|
|
* live tree. In case of an error, changes are rolled-back.
|
|
* changesets live on after initial application, and if not
|
|
* destroyed after use, they can be reverted in one single call.
|
|
*/
|
|
struct of_changeset {
|
|
struct list_head entries;
|
|
};
|
|
|
|
enum of_reconfig_change {
|
|
OF_RECONFIG_NO_CHANGE = 0,
|
|
OF_RECONFIG_CHANGE_ADD,
|
|
OF_RECONFIG_CHANGE_REMOVE,
|
|
};
|
|
|
|
#ifdef CONFIG_OF_DYNAMIC
|
|
extern int of_reconfig_notifier_register(struct notifier_block *);
|
|
extern int of_reconfig_notifier_unregister(struct notifier_block *);
|
|
extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
|
|
extern int of_reconfig_get_state_change(unsigned long action,
|
|
struct of_reconfig_data *arg);
|
|
|
|
extern void of_changeset_init(struct of_changeset *ocs);
|
|
extern void of_changeset_destroy(struct of_changeset *ocs);
|
|
extern int of_changeset_apply(struct of_changeset *ocs);
|
|
extern int of_changeset_revert(struct of_changeset *ocs);
|
|
extern int of_changeset_action(struct of_changeset *ocs,
|
|
unsigned long action, struct device_node *np,
|
|
struct property *prop);
|
|
|
|
static inline int of_changeset_attach_node(struct of_changeset *ocs,
|
|
struct device_node *np)
|
|
{
|
|
return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
|
|
}
|
|
|
|
static inline int of_changeset_detach_node(struct of_changeset *ocs,
|
|
struct device_node *np)
|
|
{
|
|
return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
|
|
}
|
|
|
|
static inline int of_changeset_add_property(struct of_changeset *ocs,
|
|
struct device_node *np, struct property *prop)
|
|
{
|
|
return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
|
|
}
|
|
|
|
static inline int of_changeset_remove_property(struct of_changeset *ocs,
|
|
struct device_node *np, struct property *prop)
|
|
{
|
|
return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
|
|
}
|
|
|
|
static inline int of_changeset_update_property(struct of_changeset *ocs,
|
|
struct device_node *np, struct property *prop)
|
|
{
|
|
return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
|
|
}
|
|
#else /* CONFIG_OF_DYNAMIC */
|
|
static inline int of_reconfig_notifier_register(struct notifier_block *nb)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int of_reconfig_notify(unsigned long action,
|
|
struct of_reconfig_data *arg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int of_reconfig_get_state_change(unsigned long action,
|
|
struct of_reconfig_data *arg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif /* CONFIG_OF_DYNAMIC */
|
|
|
|
/* CONFIG_OF_RESOLVE api */
|
|
extern int of_resolve_phandles(struct device_node *tree);
|
|
|
|
/**
|
|
* of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
|
|
* @np: Pointer to the given device_node
|
|
*
|
|
* return true if present false otherwise
|
|
*/
|
|
static inline bool of_device_is_system_power_controller(const struct device_node *np)
|
|
{
|
|
return of_property_read_bool(np, "system-power-controller");
|
|
}
|
|
|
|
/**
|
|
* Overlay support
|
|
*/
|
|
|
|
#ifdef CONFIG_OF_OVERLAY
|
|
|
|
/* ID based overlays; the API for external users */
|
|
int of_overlay_create(struct device_node *tree);
|
|
int of_overlay_destroy(int id);
|
|
int of_overlay_destroy_all(void);
|
|
|
|
#else
|
|
|
|
static inline int of_overlay_create(struct device_node *tree)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int of_overlay_destroy(int id)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int of_overlay_destroy_all(void)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* _LINUX_OF_H */
|