[PATCH u-boot-marvell 09/18] ddr: marvell: a38x: allow board specific ODT configuration

[Marek Behún]

commit 2d3b9437cf38c06c4330e0de07f29476197f5e04 upstream.

The ODT enable heuristic based on active chip-selects is not always
correct. Some board might use two chip-selects, but have only one ODT
line connected. Allow board specific mv_ddr_topology_map to directly set
the ODT configuration register value.

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
Reviewed-by: Moti Buskila <motib at marvell.com>
Reviewed-by: Nadav Haklai <Nadav.Haklai at cavium.com>
Reviewed-by: Kostya Porotchkin <Kostya.Porotchkin at cavium.com>
Signed-off-by: Marek Behún <marek.behun at nic.cz>
---
 drivers/ddr/marvell/a38x/ddr3_init.c        | 5 +++++
 drivers/ddr/marvell/a38x/ddr_topology_def.h | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/drivers/ddr/marvell/a38x/ddr3_init.c b/drivers/ddr/marvell/a38x/ddr3_init.c
index a971cc155a..7488770268 100644
--- a/drivers/ddr/marvell/a38x/ddr3_init.c
+++ b/drivers/ddr/marvell/a38x/ddr3_init.c
@@ -104,6 +104,7 @@ int ddr3_init(void)
 static int mv_ddr_training_params_set(u8 dev_num)
 {
 	struct tune_train_params params;
+	struct mv_ddr_topology_map *tm = mv_ddr_topology_map_get();
 	int status;
 	u32 cs_num;
 	int ck_delay;
@@ -136,6 +137,10 @@ static int mv_ddr_training_params_set(u8 dev_num)
 	if (ck_delay > 0)
 		params.ck_delay = ck_delay;
 
+	/* Use platform specific override ODT value */
+	if (tm->odt_config)
+		params.g_odt_config = tm->odt_config;
+
 	status = ddr3_tip_tune_training_params(dev_num, &params);
 	if (MV_OK != status) {
 		printf("%s Training Sequence - FAILED\n", ddr_type);
diff --git a/drivers/ddr/marvell/a38x/ddr_topology_def.h b/drivers/ddr/marvell/a38x/ddr_topology_def.h
index 342c2cf451..3991fec272 100644
--- a/drivers/ddr/marvell/a38x/ddr_topology_def.h
+++ b/drivers/ddr/marvell/a38x/ddr_topology_def.h
@@ -125,6 +125,9 @@ struct mv_ddr_topology_map {
 	/* electrical parameters */
 	unsigned int electrical_data[MV_DDR_EDATA_LAST];
 
+	/* ODT configuration */
+	u32 odt_config;
+
 	/* Clock enable mask */
 	u32 clk_enable;
 
-- 
2.26.2