Update vref_mode_ac for lpddr4 based on VDDQ/3/2=16.8%
Signed-off-by: Jagan Teki jagan@amarulasolutions.com Signed-off-by: YouMin Chen cym@rock-chips.com --- drivers/ram/rockchip/sdram_rk3399.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index 0e98079468..e3180d0ef2 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -366,7 +366,8 @@ static int phy_io_config(const struct chan_info *chan, vref_value_dq = (rd_vref - 15300) / 521; } vref_mode_ac = 0x6; - vref_value_ac = 0x1f; + /* VDDQ/3/2=16.8% */ + vref_value_ac = 0x3; } else if (params->base.dramtype == LPDDR3) { if (params->base.odt == 1) { vref_mode_dq = 0x5; /* LPDDR3 ODT */