1 /* 2 * Definitions for building a device tree by calling into the 3 * Open Firmware PROM. 4 * 5 * Copyright (C) 2010 Andres Salomon <dilinger@queued.net> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13 #ifndef _LINUX_OF_PDT_H 14 #define _LINUX_OF_PDT_H 15 16 /* overridable operations for calling into the PROM */ 17 struct of_pdt_ops { 18 /* 19 * buf should be 32 bytes; return 0 on success. 20 * If prev is NULL, the first property will be returned. 21 */ 22 int (*nextprop)(phandle node, char *prev, char *buf); 23 24 /* for both functions, return proplen on success; -1 on error */ 25 int (*getproplen)(phandle node, const char *prop); 26 int (*getproperty)(phandle node, const char *prop, char *buf, 27 int bufsize); 28 29 /* phandles are 0 if no child or sibling exists */ 30 phandle (*getchild)(phandle parent); 31 phandle (*getsibling)(phandle node); 32 33 /* return 0 on success; fill in 'len' with number of bytes in path */ 34 int (*pkg2path)(phandle node, char *buf, const int buflen, int *len); 35 }; 36 37 extern void *prom_early_alloc(unsigned long size); 38 39 /* for building the device tree */ 40 extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops); 41 42 extern void (*of_pdt_build_more)(struct device_node *dp, 43 struct device_node ***nextp); 44 45 #endif /* _LINUX_OF_PDT_H */ 46