Split fdtdec_setup_mem_size_base() into fdtdec_setup_mem_size_base_fdt(), which allows the caller to pass custom blob into the function and the original fdtdec_setup_mem_size_base(), which uses the gd->fdt_blob. This is useful when configuring the DRAM properties from a FDT blob fragment passed in by the firmware.
Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Nobuhiro Iwamatsu iwamatsu@nigauri.org Cc: Simon Glass sjg@chromium.org Cc: Tom Rini trini@konsulko.com --- include/fdtdec.h | 20 ++++++++++++++++++++ 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 @@ -917,6 +917,26 @@ struct display_timing { 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)