Re: [PATCH v3 27/57] ram: rk3399: Configure BOOSTP_EN, BOOSTN_EN for lpddr4

[Kever Yang <kever.yang@xxxxxxxxxxxxxx>]

On 2019/7/16 下午7:57, Jagan Teki wrote:
> Configure BOOSTP_EN, BOOSTN_EN for lpddr4 during phy IO config.
>
> Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: YouMin Chen <cym@xxxxxxxxxxxxxx>

Reviewed-by: Kever Yang <Kever.yang@xxxxxxxxxxxxxx>

Thanks,
 - Kever
> ---
>   drivers/ram/rockchip/sdram_rk3399.c | 24 ++++++++++++++++++++++++
>   1 file changed, 24 insertions(+)
>
> diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
> index 7625506458..a9e092c39f 100644
> --- a/drivers/ram/rockchip/sdram_rk3399.c
> +++ b/drivers/ram/rockchip/sdram_rk3399.c
> @@ -35,6 +35,9 @@
>   #define PHY_DRV_ODT_40		0xe
>   #define PHY_DRV_ODT_34_3	0xf
>   
> +#define PHY_BOOSTP_EN		0x1
> +#define PHY_BOOSTN_EN		0x1
> +
>   #define CRU_SFTRST_DDR_CTRL(ch, n)	((0x1 << (8 + 16 + (ch) * 4)) | \
>   					((n) << (8 + (ch) * 4)))
>   #define CRU_SFTRST_DDR_PHY(ch, n)	((0x1 << (9 + 16 + (ch) * 4)) | \
> @@ -312,6 +315,27 @@ static int phy_io_config(const struct chan_info *chan,
>   	/* PHY_939 PHY_PAD_CS_DRIVE */
>   	clrsetbits_le32(&denali_phy[939], 0x7 << 14, mode_sel << 14);
>   
> +	if (IS_ENABLED(CONFIG_RAM_RK3399_LPDDR4)) {
> +		/* BOOSTP_EN & BOOSTN_EN */
> +		reg_value = ((PHY_BOOSTP_EN << 4) | PHY_BOOSTN_EN);
> +		/* PHY_925 PHY_PAD_FDBK_DRIVE2 */
> +		clrsetbits_le32(&denali_phy[925], 0xff << 8, reg_value << 8);
> +		/* PHY_926 PHY_PAD_DATA_DRIVE */
> +		clrsetbits_le32(&denali_phy[926], 0xff << 12, reg_value << 12);
> +		/* PHY_927 PHY_PAD_DQS_DRIVE */
> +		clrsetbits_le32(&denali_phy[927], 0xff << 14, reg_value << 14);
> +		/* PHY_928 PHY_PAD_ADDR_DRIVE */
> +		clrsetbits_le32(&denali_phy[928], 0xff << 20, reg_value << 20);
> +		/* PHY_929 PHY_PAD_CLK_DRIVE */
> +		clrsetbits_le32(&denali_phy[929], 0xff << 22, reg_value << 22);
> +		/* PHY_935 PHY_PAD_CKE_DRIVE */
> +		clrsetbits_le32(&denali_phy[935], 0xff << 20, reg_value << 20);
> +		/* PHY_937 PHY_PAD_RST_DRIVE */
> +		clrsetbits_le32(&denali_phy[937], 0xff << 20, reg_value << 20);
> +		/* PHY_939 PHY_PAD_CS_DRIVE */
> +		clrsetbits_le32(&denali_phy[939], 0xff << 20, reg_value << 20);
> +	}
> +
>   	/* speed setting */
>   	if (params->base.ddr_freq < 400)
>   		speed = 0x0;



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