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| Commit | Line | Data |
|---|---|---|
| 0596d35d SG |
1 | /* |
| 2 | * libfdt - Flat Device Tree manipulation | |
| 3 | * Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au> | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause | |
| 5 | */ | |
| 6feed2a5 | 6 | #include <libfdt_env.h> |
| 0596d35d SG |
7 | |
| 8 | #ifndef USE_HOSTCC | |
| 9 | #include <fdt.h> | |
| 10 | #include <libfdt.h> | |
| 11 | #else | |
| 12 | #include "fdt_host.h" | |
| 13 | #endif | |
| 14 | ||
| 15 | #include "libfdt_internal.h" | |
| 16 | ||
| 17 | int fdt_address_cells(const void *fdt, int nodeoffset) | |
| 18 | { | |
| 19 | const fdt32_t *ac; | |
| 20 | int val; | |
| 21 | int len; | |
| 22 | ||
| 23 | ac = fdt_getprop(fdt, nodeoffset, "#address-cells", &len); | |
| 24 | if (!ac) | |
| 25 | return 2; | |
| 26 | ||
| 27 | if (len != sizeof(*ac)) | |
| 28 | return -FDT_ERR_BADNCELLS; | |
| 29 | ||
| 30 | val = fdt32_to_cpu(*ac); | |
| 31 | if ((val <= 0) || (val > FDT_MAX_NCELLS)) | |
| 32 | return -FDT_ERR_BADNCELLS; | |
| 33 | ||
| 34 | return val; | |
| 35 | } | |
| 36 | ||
| 37 | int fdt_size_cells(const void *fdt, int nodeoffset) | |
| 38 | { | |
| 39 | const fdt32_t *sc; | |
| 40 | int val; | |
| 41 | int len; | |
| 42 | ||
| 43 | sc = fdt_getprop(fdt, nodeoffset, "#size-cells", &len); | |
| 44 | if (!sc) | |
| 45 | return 2; | |
| 46 | ||
| 47 | if (len != sizeof(*sc)) | |
| 48 | return -FDT_ERR_BADNCELLS; | |
| 49 | ||
| 50 | val = fdt32_to_cpu(*sc); | |
| 51 | if ((val < 0) || (val > FDT_MAX_NCELLS)) | |
| 52 | return -FDT_ERR_BADNCELLS; | |
| 53 | ||
| 54 | return val; | |
| 55 | } |