[PATCH 66/92] ram: rk3399: Configure PHY RX_CM_INPUT for lpddr4

Jagan Teki
2019-06-11T14:51:09Z

Configure PHY RX_CM_INPUT for lpddr4 during phy IO config.

Signed-off-by: Jagan Teki <jagan-dyjBcgdgk7Pe9wHmmfpqLFaTQe2KTcn/@public.gmane.org>
Signed-off-by: YouMin Chen <cym-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
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 78e249e164..13c552649c 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)))
@@ -385,6 +386,27 @@ 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 (sdram_params->base.dramtype == 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;
}

--
2.18.0.321.gffc6fa0e3