ram: rk3399: Configure SLEWP_EN, SLEWN_EN for lpddr4

Configure SLEWP_EN, SLEWN_EN for lpddr4 during phy IO config.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index 0c8a7f8..d684722 100644 (file)
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -37,6 +37,8 @@
 
 #define PHY_BOOSTP_EN          0x1
 #define PHY_BOOSTN_EN          0x1
+#define PHY_SLEWP_EN           0x1
+#define PHY_SLEWN_EN           0x1
 
 #define CRU_SFTRST_DDR_CTRL(ch, n)     ((0x1 << (8 + 16 + (ch) * 4)) | \
                                        ((n) << (8 + (ch) * 4)))
@@ -334,6 +336,25 @@ static int phy_io_config(const struct chan_info *chan,
                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);
+
+               /* SLEWP_EN & SLEWN_EN */
+               reg_value = ((PHY_SLEWP_EN << 3) | PHY_SLEWN_EN);
+               /* PHY_924 PHY_PAD_FDBK_DRIVE */
+               clrsetbits_le32(&denali_phy[924], 0x3f << 8, reg_value << 8);
+               /* PHY_926 PHY_PAD_DATA_DRIVE */
+               clrsetbits_le32(&denali_phy[926], 0x3f, reg_value);
+               /* PHY_927 PHY_PAD_DQS_DRIVE */
+               clrsetbits_le32(&denali_phy[927], 0x3f, reg_value);
+               /* PHY_928 PHY_PAD_ADDR_DRIVE */
+               clrsetbits_le32(&denali_phy[928], 0x3f << 8, reg_value << 8);
+               /* PHY_929 PHY_PAD_CLK_DRIVE */
+               clrsetbits_le32(&denali_phy[929], 0x3f << 8, reg_value << 8);
+               /* PHY_935 PHY_PAD_CKE_DRIVE */
+               clrsetbits_le32(&denali_phy[935], 0x3f << 8, reg_value << 8);
+               /* PHY_937 PHY_PAD_RST_DRIVE */
+               clrsetbits_le32(&denali_phy[937], 0x3f << 8, reg_value << 8);
+               /* PHY_939 PHY_PAD_CS_DRIVE */
+               clrsetbits_le32(&denali_phy[939], 0x3f << 8, reg_value << 8);
        }
 
        /* speed setting */