[U-Boot] [PATCH v3 30/57] ram: rk3399: Map chipselect for lpddr4

Jagan Teki
2019-07-16T11:57:18Z

Assign desired cs_map values for lpddr4 during set memory map.

Initial cs_map values is based on the sdram parameters, so
the same will adjusted based dramtype as LPDDR4.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
---
drivers/ram/rockchip/sdram_rk3399.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index 2ab10da53f..7689711a99 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -188,6 +188,16 @@ static void set_memory_map(const struct chan_info *chan, u32 channel,
clrsetbits_le32(&denali_pi[155], (0x3 << 16) | (0x7 << 24),
((3 - sdram_ch->cap_info.bk) << 16) |
((16 - row) << 24));
+
+ if (IS_ENABLED(CONFIG_RAM_RK3399_LPDDR4)) {
+ if (cs_map == 1)
+ cs_map = 0x5;
+ else if (cs_map == 2)
+ cs_map = 0xa;
+ else
+ cs_map = 0xF;
+ }
+
/* PI_41 PI_CS_MAP:RW:24:4 */
clrsetbits_le32(&denali_pi[41], 0xf << 24, cs_map << 24);
if (sdram_ch->cap_info.rank == 1 && params->base.dramtype == DDR3)
--
2.18.0.321.gffc6fa0e3