mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2017 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef _DM_OF_H
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#define _DM_OF_H
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#include <asm/u-boot.h>
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#include <asm/global_data.h>
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/* integer value within a device tree property which references another node */
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typedef u32 phandle;
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/**
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* struct property: Device tree property
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*
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* @name: Property name
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* @length: Length of property in bytes
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* @value: Pointer to property value
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* @next: Pointer to next property, or NULL if none
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*/
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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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};
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/**
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* struct device_node: Device tree node
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*
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* @name: Node name
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* @type: Node type (value of device_type property) or "<NULL>" if none
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* @phandle: Phandle value of this none, or 0 if none
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* @full_name: Full path to node, e.g. "/bus@1/spi@1100"
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* @properties: Pointer to head of list of properties, or NULL if none
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* @parent: Pointer to parent node, or NULL if this is the root node
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* @child: Pointer to head of child node list, or NULL if no children
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* @sibling: Pointer to the next sibling node, or NULL if this is the last
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*/
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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 device_node *parent;
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struct device_node *child;
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struct device_node *sibling;
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};
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#define OF_MAX_PHANDLE_ARGS 16
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/**
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* struct of_phandle_args - structure to hold phandle and arguments
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*
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* This is used when decoding a phandle in a device tree property. Typically
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* these look like this:
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*
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* wibble {
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* phandle = <5>;
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* };
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*
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* ...
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* some-prop = <&wibble 1 2 3>
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*
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* Here &node is the phandle of the node 'wibble', i.e. 5. There are three
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* arguments: 1, 2, 3.
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*
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* So when decoding the phandle in some-prop, np will point to wibble,
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* args_count will be 3 and the three arguments will be in args.
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*
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* @np: Node that the phandle refers to
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* @args_count: Number of arguments
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* @args: Argument values
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*/
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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[OF_MAX_PHANDLE_ARGS];
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};
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* of_live_active() - check if livetree is active
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*
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* @returns true if livetree is active, false it not
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*/
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#ifdef CONFIG_OF_LIVE
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static inline bool of_live_active(void)
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{
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return gd->of_root != NULL;
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}
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#else
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static inline bool of_live_active(void)
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{
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return false;
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}
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#endif
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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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/* Default #address and #size cells */
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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 */
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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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/* 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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#endif
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