mb/google/volteer: add support for ddr4 memory

Add new ddr_memory_cfg structure to support both DDR4 and LPDDR4x
memory types.

Change existing variant code to use the new meminit_ddr() call
instead of calling meminit_lpddr4x() directly.

BUG=b:161772961
TEST='emerge-volteer coreboot chromeos-bootimage' and verify that
volteer still boots.  NOTE that this only tests the lpddr4 side
of the implementation as I do not have a DDR4 board to test this on.

Change-Id: Id4bca2bfa97530f0d04a0e8d90f01b8281d2aea6
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44250
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/mainboard/google/volteer/variants/voxel/memory.c b/src/mainboard/google/volteer/variants/voxel/memory.c
index 455b18045d..40b108660d 100644
--- a/src/mainboard/google/volteer/variants/voxel/memory.c
+++ b/src/mainboard/google/volteer/variants/voxel/memory.c
@@ -54,7 +54,12 @@ static const struct lpddr4x_cfg voxel_memcfg = {
 	.ect = 1, /* Enable Early Command Training */
 };
 
-const struct lpddr4x_cfg *variant_memory_params(void)
+static const struct ddr_memory_cfg board_memcfg = {
+	.mem_type = MEMTYPE_LPDDR4X,
+	.lpddr4_cfg = &voxel_memcfg
+};
+
+const struct ddr_memory_cfg *variant_memory_params(void)
 {
-	return &voxel_memcfg;
+	return &board_memcfg;
 }