lib: fdt: Split fdtdec_setup_memory_banksize()

Split fdtdec_setup_memory_banksize() into fdtdec_setup_memory_banksize_fdt(),
which allows the caller to pass custom blob into the function and the
original fdtdec_setup_memory_banksize(), 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>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/fdtdec.h b/include/fdtdec.h
index 3e681099a8..ad00f79f20 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -956,6 +956,25 @@ int fdtdec_setup_mem_size_base_fdt(const void *blob);
 int fdtdec_setup_mem_size_base(void);
 
 /**
+ * fdtdec_setup_memory_banksize_fdt() - decode and populate gd->bd->bi_dram
+ *
+ * Decode the /memory 'reg' property to determine the address and size of the
+ * memory banks. Use this data to populate the global data board info with the
+ * phys address and size of memory banks.
+ *
+ * This function should be called from a boards dram_init_banksize(). This
+ * helper function allows for boards to query the device tree for memory bank
+ * information instead of hard coding the information in cases where it 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_memory_banksize_fdt(const void *blob);
+
+/**
  * fdtdec_setup_memory_banksize() - decode and populate gd->bd->bi_dram
  *
  * Decode the /memory 'reg' property to determine the address and size of the