gru: include ram_code in coreboot table

This is needed to ensure that the ram-code node is included in the
device tree by depthcharge.

BRANCH=none
BUG=chrome-os-partner:54566
TEST=built updated firmware, booted on kevin into Linux shell, checked
     the device tree contents:

  localhost ~ # od -tx1 /proc/device-tree/firmware/coreboot/ram-code
  0000000 00 00 00 01
  0000004
  localhost #

Change-Id: Ibe96e3bc8fc0106013241738f5726783d74bd78b
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 53c002114f7044b88728c9e17150cd3a2cf1f80f
Original-Change-Id: Iba573fba9f9b88b87867c6963e48215e254319ed
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/354705
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15566
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 16 insertions, 6 deletions

diff --git a/src/mainboard/google/gru/sdram_configs.c b/src/mainboard/google/gru/sdram_configs.c
index 92e00efdba..f1f889c334 100644
--- a/src/mainboard/google/gru/sdram_configs.c
+++ b/src/mainboard/google/gru/sdram_configs.c
@@ -38,19 +38,29 @@ enum dram_speeds {
 /*	dram_928MHz = 4, */
 };
 
-const struct rk3399_sdram_params *get_sdram_config()
+static enum dram_speeds get_sdram_index(void)
 {
-	enum dram_speeds speed;
-
 	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN))
-		speed = dram_300MHz;
+		return dram_300MHz;
 	else if (IS_ENABLED(CONFIG_BOARD_GOOGLE_GRU))
-		speed = dram_800MHz;
+		return dram_800MHz;
 	else
-		speed = dram_200MHz;
+		return dram_200MHz;
+}
+
+const struct rk3399_sdram_params *get_sdram_config()
+{
+
+	enum dram_speeds speed = get_sdram_index();
 
 	printk(BIOS_INFO, "Using SDRAM configuration for %d MHz\n",
 	       sdram_configs[speed].ddr_freq / (1000 * 1000));
 
 	return &sdram_configs[speed];
 }
+
+
+uint32_t ram_code(void)
+{
+	return get_sdram_index();
+}