[U-Boot] [PATCH v3 39/57] ram: rk3399: Update lpddr4 mode_sel based on io settings

Kever Yang
2019-07-16T13:16:56Z

On 2019/7/16 下午7:57, Jagan Teki wrote:
> The mode_sel on lpddr4 value is depending on IO settings
> of rd_vref.
>
> Add support for it.
>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> Signed-off-by: YouMin Chen <cym@rock-chips.com>

Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>

Thanks,
- Kever
> ---
> drivers/ram/rockchip/sdram_rk3399.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
> index 4a2622a440..63763062f9 100644
> --- a/drivers/ram/rockchip/sdram_rk3399.c
> +++ b/drivers/ram/rockchip/sdram_rk3399.c
> @@ -347,7 +347,7 @@ static int phy_io_config(const struct chan_info *chan,
> u32 drv_value, odt_value;
> u32 speed;
>
> - /* vref setting */
> + /* vref setting & mode setting */
> if (params->base.dramtype == LPDDR4) {
> struct io_setting *io = lpddr4_get_io_settings(params, mr5);
> u32 rd_vref = io->rd_vref * 1000;
> @@ -355,15 +355,18 @@ static int phy_io_config(const struct chan_info *chan,
> if (rd_vref < 36700) {
> /* MODE_LV[2:0] = LPDDR4 (Range 2)*/
> vref_mode_dq = 0x7;
> + /* MODE[2:0]= LPDDR4 Range 2(0.4*VDDQ) */
> + mode_sel = 0x5;
> vref_value_dq = (rd_vref - 3300) / 521;
> } else {
> /* MODE_LV[2:0] = LPDDR4 (Range 1)*/
> vref_mode_dq = 0x6;
> + /* MODE[2:0]= LPDDR4 Range 1(0.33*VDDQ) */
> + mode_sel = 0x4;
> vref_value_dq = (rd_vref - 15300) / 521;
> }
> vref_mode_ac = 0x6;
> vref_value_ac = 0x1f;
> - mode_sel = 0x6;
> } else if (params->base.dramtype == LPDDR3) {
> if (params->base.odt == 1) {
> vref_mode_dq = 0x5; /* LPDDR3 ODT */