diff options
Diffstat (limited to 'scripts/dtc/libfdt/fdt_ro.c')
| -rw-r--r-- | scripts/dtc/libfdt/fdt_ro.c | 50 |
1 files changed, 35 insertions, 15 deletions
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c index eafc14282892..2c393a100bfc 100644 --- a/scripts/dtc/libfdt/fdt_ro.c +++ b/scripts/dtc/libfdt/fdt_ro.c @@ -144,29 +144,49 @@ static int fdt_string_eq_(const void *fdt, int stroffset, return p && (slen == len) && (memcmp(p, s, len) == 0); } -uint32_t fdt_get_max_phandle(const void *fdt) +int fdt_find_max_phandle(const void *fdt, uint32_t *phandle) { - uint32_t max_phandle = 0; - int offset; + uint32_t max = 0; + int offset = -1; - for (offset = fdt_next_node(fdt, -1, NULL);; - offset = fdt_next_node(fdt, offset, NULL)) { - uint32_t phandle; + while (true) { + uint32_t value; - if (offset == -FDT_ERR_NOTFOUND) - return max_phandle; + offset = fdt_next_node(fdt, offset, NULL); + if (offset < 0) { + if (offset == -FDT_ERR_NOTFOUND) + break; - if (offset < 0) - return (uint32_t)-1; + return offset; + } - phandle = fdt_get_phandle(fdt, offset); - if (phandle == (uint32_t)-1) - continue; + value = fdt_get_phandle(fdt, offset); - if (phandle > max_phandle) - max_phandle = phandle; + if (value > max) + max = value; } + if (phandle) + *phandle = max; + + return 0; +} + +int fdt_generate_phandle(const void *fdt, uint32_t *phandle) +{ + uint32_t max; + int err; + + err = fdt_find_max_phandle(fdt, &max); + if (err < 0) + return err; + + if (max == FDT_MAX_PHANDLE) + return -FDT_ERR_NOPHANDLES; + + if (phandle) + *phandle = max + 1; + return 0; } |