[U-Boot] [PATCH v3 29/57] ram: rk3399: Configure PHY RX_CM_INPUT for lpddr4

Kever Yang
2019-07-16T13:13:27Z

On 2019/7/16 下午7:57, Jagan Teki wrote:
> Configure PHY RX_CM_INPUT for lpddr4 during phy IO config.
>
> 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 | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
> index c02f936f2a..2ab10da53f 100644
> --- a/drivers/ram/rockchip/sdram_rk3399.c
> +++ b/drivers/ram/rockchip/sdram_rk3399.c
> @@ -39,6 +39,7 @@
> #define PHY_BOOSTN_EN 0x1
> #define PHY_SLEWP_EN 0x1
> #define PHY_SLEWN_EN 0x1
> +#define PHY_RX_CM_INPUT 0x1
>
> #define CRU_SFTRST_DDR_CTRL(ch, n) ((0x1 << (8 + 16 + (ch) * 4)) | \
> ((n) << (8 + (ch) * 4)))
> @@ -384,6 +385,27 @@ static int phy_io_config(const struct chan_info *chan,
> /* PHY_939 PHY_PAD_CS_DRIVE */
> clrsetbits_le32(&denali_phy[939], 0x3 << 17, speed << 17);
>
> + if (IS_ENABLED(CONFIG_RAM_RK3399_LPDDR4)) {
> + /* RX_CM_INPUT */
> + reg_value = PHY_RX_CM_INPUT;
> + /* PHY_924 PHY_PAD_FDBK_DRIVE */
> + clrsetbits_le32(&denali_phy[924], 0x1 << 14, reg_value << 14);
> + /* PHY_926 PHY_PAD_DATA_DRIVE */
> + clrsetbits_le32(&denali_phy[926], 0x1 << 11, reg_value << 11);
> + /* PHY_927 PHY_PAD_DQS_DRIVE */
> + clrsetbits_le32(&denali_phy[927], 0x1 << 13, reg_value << 13);
> + /* PHY_928 PHY_PAD_ADDR_DRIVE */
> + clrsetbits_le32(&denali_phy[928], 0x1 << 19, reg_value << 19);
> + /* PHY_929 PHY_PAD_CLK_DRIVE */
> + clrsetbits_le32(&denali_phy[929], 0x1 << 21, reg_value << 21);
> + /* PHY_935 PHY_PAD_CKE_DRIVE */
> + clrsetbits_le32(&denali_phy[935], 0x1 << 19, reg_value << 19);
> + /* PHY_937 PHY_PAD_RST_DRIVE */
> + clrsetbits_le32(&denali_phy[937], 0x1 << 19, reg_value << 19);
> + /* PHY_939 PHY_PAD_CS_DRIVE */
> + clrsetbits_le32(&denali_phy[939], 0x1 << 19, reg_value << 19);
> + }
> +
> return 0;
> }
>