diff options
Diffstat (limited to 'cpukit/include')
| -rw-r--r-- | cpukit/include/libfdt.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/cpukit/include/libfdt.h b/cpukit/include/libfdt.h index e1498c3c21..39ff6d5d25 100644 --- a/cpukit/include/libfdt.h +++ b/cpukit/include/libfdt.h @@ -140,6 +140,10 @@ #define FDT_ERR_MAX 17 +/* constants */ +#define FDT_MAX_PHANDLE 0xfffffffe + /* Valid values for phandles range from 1 to 2^32-2. */ + /**********************************************************************/ /* Low-level functions (you probably don't need these) */ /**********************************************************************/ @@ -417,6 +421,21 @@ int fdt_find_max_phandle(const void *fdt, uint32_t *phandle); uint32_t fdt_get_max_phandle(const void *fdt); /** + * fdt_generate_phandle - return a new, unused phandle for a device tree blob + * @fdt: pointer to the device tree blob + * @phandle: return location for the new phandle + * + * Walks the device tree blob and looks for the highest phandle value. On + * success, the new, unused phandle value (one higher than the previously + * highest phandle value in the device tree blob) will be returned in the + * @phandle parameter. + * + * Returns: + * 0 on success or a negative error-code on failure + */ +int fdt_generate_phandle(const void *fdt, uint32_t *phandle); + +/** * fdt_num_mem_rsv - retrieve the number of memory reserve map entries * @fdt: pointer to the device tree blob * |