1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2 | /* |
3 | * Definitions for building a device tree by calling into the |
4 | * Open Firmware PROM. |
5 | * |
6 | * Copyright (C) 2010 Andres Salomon <dilinger@queued.net> |
7 | */ |
8 | |
9 | #ifndef _LINUX_OF_PDT_H |
10 | #define _LINUX_OF_PDT_H |
11 | |
12 | /* overridable operations for calling into the PROM */ |
13 | struct of_pdt_ops { |
14 | /* |
15 | * buf should be 32 bytes; return 0 on success. |
16 | * If prev is NULL, the first property will be returned. |
17 | */ |
18 | int (*nextprop)(phandle node, char *prev, char *buf); |
19 | |
20 | /* for both functions, return proplen on success; -1 on error */ |
21 | int (*getproplen)(phandle node, const char *prop); |
22 | int (*getproperty)(phandle node, const char *prop, char *buf, |
23 | int bufsize); |
24 | |
25 | /* phandles are 0 if no child or sibling exists */ |
26 | phandle (*getchild)(phandle parent); |
27 | phandle (*getsibling)(phandle node); |
28 | |
29 | /* return 0 on success; fill in 'len' with number of bytes in path */ |
30 | int (*pkg2path)(phandle node, char *buf, const int buflen, int *len); |
31 | }; |
32 | |
33 | extern void *prom_early_alloc(unsigned long size); |
34 | |
35 | /* for building the device tree */ |
36 | extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops); |
37 | |
38 | #endif /* _LINUX_OF_PDT_H */ |
39 | |