tsel write ca_p and ca_n values need to write on PHY 544, 672 and 800 to configure ds odt.
Configure the same PHY register for lpddr4 would require a mask value of (300 << 8).
Add support for it.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com Signed-off-by: YouMin Chen cym@rock-chips.com --- drivers/ram/rockchip/sdram_rk3399.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index ecc215b9c7..a251fc6045 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -503,9 +503,18 @@ static void set_ds_odt(const struct chan_info *chan,
/* phy_adr_tsel_select_ 8bits DENALI_PHY_544/672/800 offset_0 */ reg_value = tsel_wr_select_ca_n | (tsel_wr_select_ca_p << 0x4); - clrsetbits_le32(&denali_phy[544], 0xff, reg_value); - clrsetbits_le32(&denali_phy[672], 0xff, reg_value); - clrsetbits_le32(&denali_phy[800], 0xff, reg_value); + if (sdram_params->base.dramtype == LPDDR4) { + /* LPDDR4 these register read always return 0, so + * can not use clrsetbits_le32(), need to write32 + */ + writel((0x300 << 8) | reg_value, &denali_phy[544]); + writel((0x300 << 8) | reg_value, &denali_phy[672]); + writel((0x300 << 8) | reg_value, &denali_phy[800]); + } else { + clrsetbits_le32(&denali_phy[544], 0xff, reg_value); + clrsetbits_le32(&denali_phy[672], 0xff, reg_value); + clrsetbits_le32(&denali_phy[800], 0xff, reg_value); + }
/* phy_pad_addr_drive 8bits DENALI_PHY_928 offset_0 */ clrsetbits_le32(&denali_phy[928], 0xff, reg_value);