diff options
| -rw-r--r-- | include/fdtdec.h | 20 | ||||
| -rw-r--r-- | lib/fdtdec.c | 11 |
2 files changed, 28 insertions, 3 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h index b7e35cd87c..3e681099a8 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -918,6 +918,26 @@ int fdtdec_decode_display_timing(const void *blob, int node, int index, struct display_timing *config); /** + * fdtdec_setup_mem_size_base_fdt() - decode and setup gd->ram_size and + * gd->ram_start + * + * Decode the /memory 'reg' property to determine the size and start of the + * first memory bank, populate the global data with the size and start of the + * first bank of memory. + * + * This function should be called from a boards dram_init(). This helper + * function allows for boards to query the device tree for DRAM size and start + * address instead of hard coding the value in the case where the memory size + * and start address cannot be detected automatically. + * + * @param blob FDT blob + * + * @return 0 if OK, -EINVAL if the /memory node or reg property is missing or + * invalid + */ +int fdtdec_setup_mem_size_base_fdt(const void *blob); + +/** * fdtdec_setup_mem_size_base() - decode and setup gd->ram_size and * gd->ram_start * diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 09a7e133a5..3f29e9d647 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1088,18 +1088,18 @@ int fdtdec_decode_display_timing(const void *blob, int parent, int index, return ret; } -int fdtdec_setup_mem_size_base(void) +int fdtdec_setup_mem_size_base_fdt(const void *blob) { int ret, mem; struct fdt_resource res; - mem = fdt_path_offset(gd->fdt_blob, "/memory"); + mem = fdt_path_offset(blob, "/memory"); if (mem < 0) { debug("%s: Missing /memory node\n", __func__); return -EINVAL; } - ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res); + ret = fdt_get_resource(blob, mem, "reg", 0, &res); if (ret != 0) { debug("%s: Unable to decode first memory bank\n", __func__); return -EINVAL; @@ -1113,6 +1113,11 @@ int fdtdec_setup_mem_size_base(void) return 0; } +int fdtdec_setup_mem_size_base(void) +{ + return fdtdec_setup_mem_size_base_fdt(gd->fdt_blob); +} + #if defined(CONFIG_NR_DRAM_BANKS) static int get_next_memory_node(const void *blob, int mem) |