mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
5063e25a30
The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
|
|
* Definitions for building a device tree by calling into the
|
|
* Open Firmware PROM.
|
|
*
|
|
* Copyright (C) 2010 Andres Salomon <dilinger@queued.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _LINUX_OF_PDT_H
|
|
#define _LINUX_OF_PDT_H
|
|
|
|
/* overridable operations for calling into the PROM */
|
|
struct of_pdt_ops {
|
|
/*
|
|
* buf should be 32 bytes; return 0 on success.
|
|
* If prev is NULL, the first property will be returned.
|
|
*/
|
|
int (*nextprop)(phandle node, char *prev, char *buf);
|
|
|
|
/* for both functions, return proplen on success; -1 on error */
|
|
int (*getproplen)(phandle node, const char *prop);
|
|
int (*getproperty)(phandle node, const char *prop, char *buf,
|
|
int bufsize);
|
|
|
|
/* phandles are 0 if no child or sibling exists */
|
|
phandle (*getchild)(phandle parent);
|
|
phandle (*getsibling)(phandle node);
|
|
|
|
/* return 0 on success; fill in 'len' with number of bytes in path */
|
|
int (*pkg2path)(phandle node, char *buf, const int buflen, int *len);
|
|
};
|
|
|
|
extern void *prom_early_alloc(unsigned long size);
|
|
|
|
/* for building the device tree */
|
|
extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops);
|
|
|
|
extern void (*of_pdt_build_more)(struct device_node *dp);
|
|
|
|
#endif /* _LINUX_OF_PDT_H */
|