diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/fdt_wrappers.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/common/fdt_wrappers.c b/common/fdt_wrappers.c index 1715a6f0..31dafb2e 100644 --- a/common/fdt_wrappers.c +++ b/common/fdt_wrappers.c @@ -40,7 +40,6 @@ int fdtw_read_cells(const void *dtb, int node, const char *prop, return -1; } - /* Verify that property length accords with cell length */ if (NCELLS((unsigned int)value_len) != cells) { WARN("Property length mismatch\n"); @@ -63,6 +62,45 @@ int fdtw_read_cells(const void *dtb, int node, const char *prop, } /* + * Read cells from a given property of the given node. Any number of 32-bit + * cells of the property can be read. The fdt pointer is updated. Returns 0 on + * success, and -1 on error. + */ +int fdtw_read_array(const void *dtb, int node, const char *prop, + unsigned int cells, void *value) +{ + const uint32_t *value_ptr; + int value_len; + + assert(dtb != NULL); + assert(prop != NULL); + assert(value != NULL); + assert(node >= 0); + + /* Access property and obtain its length (in bytes) */ + value_ptr = fdt_getprop_namelen(dtb, node, prop, (int)strlen(prop), + &value_len); + if (value_ptr == NULL) { + WARN("Couldn't find property %s in dtb\n", prop); + return -1; + } + + /* Verify that property length accords with cell length */ + if (NCELLS((unsigned int)value_len) != cells) { + WARN("Property length mismatch\n"); + return -1; + } + + uint32_t *dst = value; + + for (unsigned int i = 0U; i < cells; i++) { + dst[i] = fdt32_to_cpu(value_ptr[i]); + } + + return 0; +} + +/* * Read string from a given property of the given node. Up to 'size - 1' * characters are read, and a NUL terminator is added. Returns 0 on success, * and -1 upon error. |