1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * OLPC-specific OFW device tree support code.
6  * Copyright (C) 1996-2005 Paul Mackerras.
22 static phandle __init olpc_dt_getsibling(phandle node)  in olpc_dt_getsibling()
27 	if ((s32)node == -1)  in olpc_dt_getsibling()
30 	if (olpc_ofw("peer", args, res) || (s32)node == -1)  in olpc_dt_getsibling()
36 static phandle __init olpc_dt_getchild(phandle node)  in olpc_dt_getchild()
41 	if ((s32)node == -1)  in olpc_dt_getchild()
44 	if (olpc_ofw("child", args, res) || (s32)node == -1) {  in olpc_dt_getchild()
52 static int __init olpc_dt_getproplen(phandle node, const char *prop)  in olpc_dt_getproplen()
58 	if ((s32)node == -1)  in olpc_dt_getproplen()
59 		return -1;  in olpc_dt_getproplen()
63 		return -1;  in olpc_dt_getproplen()
69 static int __init olpc_dt_getproperty(phandle node, const char *prop,  in olpc_dt_getproperty()
76 		return -1;  in olpc_dt_getproperty()
83 			return -1;  in olpc_dt_getproperty()
90 static int __init olpc_dt_nextprop(phandle node, char *prev, char *buf)  in olpc_dt_nextprop()
98 	if ((s32)node == -1)  in olpc_dt_nextprop()
99 		return -1;  in olpc_dt_nextprop()
102 		return -1;  in olpc_dt_nextprop()
107 static int __init olpc_dt_pkg2path(phandle node, char *buf,  in olpc_dt_pkg2path()
113 	if ((s32)node == -1)  in olpc_dt_pkg2path()
114 		return -1;  in olpc_dt_pkg2path()
116 	if (olpc_ofw("package-to-path", args, res) || *len < 1)  in olpc_dt_pkg2path()
117 		return -1;  in olpc_dt_pkg2path()
151 	free_mem -= size;  in prom_early_alloc()
166 static phandle __init olpc_dt_finddevice(const char *path)  in olpc_dt_finddevice()
168 	phandle node;  in olpc_dt_finddevice()
177 	if ((s32) node == -1)  in olpc_dt_finddevice()
191 		return -1;  in olpc_dt_interpret()
203 	phandle node;  in olpc_dt_get_board_revision()
211 	r = olpc_dt_getproperty(node, "board-revision-int",  in olpc_dt_get_board_revision()
219 static int __init olpc_dt_compatible_match(phandle node, const char *compat)  in olpc_dt_compatible_match()
239 	phandle node;  in olpc_dt_fixup()
251 		/* XO-1.5 */  in olpc_dt_fixup()
253 		if (olpc_dt_compatible_match(node, "olpc,xo1.5-battery"))  in olpc_dt_fixup()
256 		/* Add olpc,xo1.5-battery compatible marker to battery node */  in olpc_dt_fixup()
257 		olpc_dt_interpret("\" /battery@0\" find-device");  in olpc_dt_fixup()
258 		olpc_dt_interpret("  \" olpc,xo1.5-battery\" +compatible");  in olpc_dt_fixup()
259 		olpc_dt_interpret("device-end");  in olpc_dt_fixup()
261 		if (olpc_dt_compatible_match(node, "olpc,xo1-battery")) {  in olpc_dt_fixup()
263 			 * If we have a olpc,xo1-battery compatible, then we're  in olpc_dt_fixup()
264 			 * running a new enough firmware that already has  in olpc_dt_fixup()
271 		olpc_dt_interpret("\" /pci/display@1\" find-device");  in olpc_dt_fixup()
272 		olpc_dt_interpret("  new-device");  in olpc_dt_fixup()
273 		olpc_dt_interpret("    \" dcon\" device-name");  in olpc_dt_fixup()
274 		olpc_dt_interpret("    \" olpc,xo1-dcon\" +compatible");  in olpc_dt_fixup()
275 		olpc_dt_interpret("  finish-device");  in olpc_dt_fixup()
276 		olpc_dt_interpret("device-end");  in olpc_dt_fixup()
278 		/* XO-1 */  in olpc_dt_fixup()
280 		if (olpc_dt_compatible_match(node, "olpc,xo1-battery")) {  in olpc_dt_fixup()
282 			 * If we have a olpc,xo1-battery compatible, then we're  in olpc_dt_fixup()
283 			 * running a new enough firmware that already has  in olpc_dt_fixup()
289 		/* Add dcon device, mark RTC as olpc,xo1-rtc */  in olpc_dt_fixup()
290 		olpc_dt_interpret("\" /pci/display@1,1\" find-device");  in olpc_dt_fixup()
291 		olpc_dt_interpret("  new-device");  in olpc_dt_fixup()
292 		olpc_dt_interpret("    \" dcon\" device-name");  in olpc_dt_fixup()
293 		olpc_dt_interpret("    \" olpc,xo1-dcon\" +compatible");  in olpc_dt_fixup()
294 		olpc_dt_interpret("  finish-device");  in olpc_dt_fixup()
295 		olpc_dt_interpret("device-end");  in olpc_dt_fixup()
297 		olpc_dt_interpret("\" /rtc\" find-device");  in olpc_dt_fixup()
298 		olpc_dt_interpret(" \" olpc,xo1-rtc\" +compatible");  in olpc_dt_fixup()
299 		olpc_dt_interpret("device-end");  in olpc_dt_fixup()
302 	/* Add olpc,xo1-battery compatible marker to battery node */  in olpc_dt_fixup()
303 	olpc_dt_interpret("\" /battery@0\" find-device");  in olpc_dt_fixup()
304 	olpc_dt_interpret("  \" olpc,xo1-battery\" +compatible");  in olpc_dt_fixup()
305 	olpc_dt_interpret("device-end");  in olpc_dt_fixup()
310 	phandle root;  in olpc_dt_build_devicetree()