Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * libfdt - Flat Device Tree manipulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (C) 2006 David Gibson, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include "libfdt_env.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <libfdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "libfdt_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 					const char *name, int namelen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 					uint32_t idx, const void *val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 					int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	void *propval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	int proplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 					&proplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	if (!propval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		return proplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	if ((unsigned)proplen < (len + idx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		return -FDT_ERR_NOSPACE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	memcpy((char *)propval + idx, val, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			const void *val, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	const void *propval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	int proplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	if (!propval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		return proplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (proplen != len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return -FDT_ERR_NOSPACE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 						   strlen(name), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 						   val, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void fdt_nop_region_(void *start, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	fdt32_t *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	for (p = start; (char *)p < ((char *)start + len); p++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		*p = cpu_to_fdt32(FDT_NOP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	struct fdt_property *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	if (!prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	fdt_nop_region_(prop, len + sizeof(*prop));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int fdt_node_end_offset_(void *fdt, int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	int depth = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	while ((offset >= 0) && (depth >= 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		offset = fdt_next_node(fdt, offset, &depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	return offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int fdt_nop_node(void *fdt, int nodeoffset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	int endoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	endoffset = fdt_node_end_offset_(fdt, nodeoffset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	if (endoffset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 		return endoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	fdt_nop_region_(fdt_offset_ptr_w(fdt, nodeoffset, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 			endoffset - nodeoffset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }